3Com Switch TR User Manual

SUPERSTACK II SWITCH 2000 TR  
®
USER GUIDE  
Version 4.0  
http://www.3com.com/  
Part No. 99032  
Published October 1997  
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CONTENTS  
Summary of ATM Features 1-10  
The FDDI Module 1-10  
ABOUT THIS GUIDE  
Introduction  
Conventions  
1
Benefits of FDDI 1-11  
Summary of FDDI Module Features 1-11  
The Token Ring-in-Fast Ethernet (TR-in-FE) Module 1-11  
Benefits of TR-in-FE 1-11  
1
Related Publications  
2
Summary of TR-in-FE Module Features 1-12  
Migrating to High-speed Technologies 1-13  
High-speed Cascade Connectors 1-14  
Token Ring Switching Concepts 1-14  
Why Token Ring Switching? 1-14  
Source Route Bridging (SRT) 1-14  
Transparent Bridging (TP) 1-15  
Bridge Table 1-15  
1
OVERVIEW  
About the SuperStack II Switch 2000 TR 1-1  
System Benefits 1-1  
System Features 1-2  
Summary of Features 1-3  
Typical Applications of Token Ring Switching 1-4  
Ring Segmentation 1-5  
The Front Panel 1-6  
Source Route Transparent Bridging 1-16  
Spanning Tree 1-16  
RJ-45 Ports 1-7  
802.1d Spanning Tree 1-16  
Front Panel LEDs 1-7  
IBM Spanning Tree 1-16  
LCD Display Buttons 1-7  
The Rear Panel 1-8  
Congestion Control 1-17  
Forwarding Modes 1-17  
Power Socket 1-9  
VLANs 1-18  
Serial Number 1-9  
Advantages of VLAN 1-18  
Redundant Power System Connector 1-9  
Reset Button 1-9  
2
GETTING STARTED  
Console Port 1-9  
Optional Slide-In Modules 1-9  
The ATM Module 1-9  
Important Safety Information 2-1  
Positioning the Switch 2000 TR 2-2  
Considerations for Placement 2-2  
Benefits of an ATM 1-9  
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Configuration Guidelines 2-3  
Power Supply and Fuse 2-3  
Replacing the Fuse 2-3  
Key Board Shortcuts 3-7  
Correcting Text Entries 3-8  
Default Users 3-8  
Installing the Slide-in Modules 2-3  
Installing the Switch 2000 TR 2-5  
Rack Mounting 2-5  
VT100 Console Menu Map 3-9  
Setting Up the VT100 Console 3-10  
Switch 2000 TR Management Setup Fields 3-11  
MAC Address 3-11  
Wall Mounting 2-5  
Stack Mounting 2-5  
Locally Admin Address 3-11  
Work Group ID 3-12  
Connecting Redundant Power System 2-6  
Connecting to the Serial Port 2-6  
Connecting a VT100 Terminal 2-6  
Device Defaults 2-6  
Device IP Address 3-12  
Device SubNet Mask 3-12  
Default Router 3-12  
SETUP TRAPS 3-12  
SERIAL PORT 3-12  
3
SETTING UP FOR MANAGEMENT  
The LCD Console 3-13  
LCD Console Buttons 3-13  
Enter 3-13  
Switch 2000 TR Management Options 3-1  
VT100 Management Interface 3-2  
Via the Serial Port 3-2  
Via an IP Network Connection 3-2  
Head Unit 3-3  
Right Arrow 3-13  
Up Arrow 3-13  
Down Arrow 3-13  
Cascade Connections 3-3  
Managing over the Network 3-4  
IP Addresses 3-4  
LCD Console Menu Map 3-14  
Setting Up the LCD Console 3-15  
IP Address Setup 3-15  
Setting Up BOOTP 3-16  
Auto Logout 3-18  
Operating IP in a Closed Network 3-4  
Obtaining Network Addresses 3-4  
Management Prerequisites 3-5  
Source Routing Prerequisites 3-6  
Switch 2000 TR Management Consoles 3-6  
The VT100 Console 3-6  
Upgrading Software 3-19  
Upgrading Module Software 3-20  
Resetting the Switch 2000 TR 3-21  
VT100 Console Reset 3-21  
LCD Console Reset 3-21  
Reset Button 3-22  
Choice Field 3-6  
Entry Field 3-7  
Button 3-7  
Power Cycle Reset 3-22  
List Boxes 3-7  
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Unit Configuration 4-14  
Setting Up the Unit 4-14  
Unit ID 4-14  
4
CONFIGURING WITH THE VT100 INTERFACE  
Quick Setup 4-2  
Bridge Configuration 4-3  
Setting Source Routing Transparent (VT100) 4-3  
Setting Source Route Bridging 4-4  
Setting Transparent Bridging 4-4  
Spanning Tree Fields 4-5  
Unit Name 4-14  
Port Capacity 4-14  
Option Slot 4-14  
Power Supply 4-14  
Power On Self Test 4-15  
Roving Analysis 4-15  
Spanning Tree Parameters 4-5  
Port Configuration 4-6  
Administrative Configuration 4-15  
Setting Local Security 4-16  
Creating New Users 4-17  
Deleting Users 4-17  
Setting Up Ports 4-6  
Setting the Port Admin. State 4-6  
Setting VLAN ID 4-6  
Setting Port Personality 4-7  
Setting Port Priorities 4-7  
Setting Congestion Control 4-7  
Setting Port Speed 4-8  
Editing Users and Changing Passwords 4-18  
About the Switch Database (SDB) 4-19  
Database Entries 4-19  
Database Entry Methods 4-19  
Switch Database Configuration 4-20  
Deleting Entries from the Database 4-21  
Finding Entries in the Database 4-21  
SNMP Trap Configuration 4-21  
Serial Port Configuration 4-22  
Connection Type 4-23  
DCD Control 4-23  
Setting Forwarding Mode 4-8  
Dynamic Cut-Thru Threshold% 4-8  
Setting Broadcast Storm Control 4-9  
Rising Threshold% 4-9  
Falling Threshold% 4-9  
Rising Action 4-9  
Falling Action 4-9  
Port Bridge Configuration 4-10  
I/O Module Configuration 4-11  
Stack Configuration 4-11  
Setting Up the Stack 4-11  
Setting sysName 4-12  
DSR Control 4-23  
Flow Control 4-23  
Auto Config 4-23  
Speed 4-23  
Char Size 4-23  
BOOTP Client 4-12  
Parity 4-23  
VLAN Configuration 4-12  
Assigning a Port to a VLAN 4-13  
Specifying a Backbone Port 4-13  
Stop Bit 4-23  
Initializing the Switch 2000 TR 4-24  
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Connecting Common VLANs Between Switch Units 7-4  
Using Non-routable Protocols 7-4  
Using Unique MAC Addresses 7-4  
Extending VLANs into an ATM Network 7-4  
Example 1 7-4  
5
6
7
CONFIGURING WITH THE LCD CONSOLE  
Unit Configuration 5-1  
Bridge Configuration 5-2  
Port Configuration 5-3  
Setting Port ID 5-3  
Viewing Link State 5-3  
Setting Port State 5-4  
Setting Speed 5-4  
A
SOFTWARE UPGRADE UTILITY  
Software Upgrade Utility Command Set A-1  
Starting the Software Upgrade Utility A-2  
Using the Commands A-3  
Setting Port Personality 5-5  
I/O Module Configuration 5-5  
Resetting to Factory Defaults A-3  
Downloading a New Software Image A-3  
MONITORING THE SWITCH 2000 TR  
Locating Statistics 6-1  
Unit Statistics 6-2  
Port Statistics 6-3  
Port Statistics (Traffic) 6-4  
Status Messages A-4  
B
C
SCREEN ACCESS RIGHTS  
Status 6-7  
Fault Log 6-8  
SERIAL PORT CABLE PIN-OUTS  
Remote Polling (PING) 6-9  
LCD Status 6-10  
Cabling for Module Options C-1  
VIRTUAL LANS  
What are VLANs? 7-1  
D
E
TROUBLESHOOTING  
Troubleshooting Procedures D-1  
Benefits of VLANs 7-2  
How VLANs Ease Change and Movement 7-2  
How VLANs Control Broadcast Traffic 7-2  
How VLANs Provide Extra Security 7-2  
VLANs and the Switch 2000 TR 7-3  
SWITCH 2000 TR  
TECHNICAL SPECIFICATIONS  
Specifications for Module Options E-2  
The Default VLAN and Moving Ports From the Default  
VLAN 7-3  
Connecting VLANs to a Router 7-3  
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F
TECHNICAL SUPPORT  
Online Technical Services F-1  
World Wide Web Site F-1  
3Com Bulletin Board Service F-1  
Access by Analog Modem F-1  
Access by Digital Modem F-2  
3ComFacts Automated Fax Service F-2  
3ComForum on CompuServe Online Service F-3  
Support from Your Network Supplier F-3  
Support from 3Com F-3  
Returning Products for Repair F-4  
3COM CORPORATION LIMITED WARRANTY  
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ABOUT THIS GUIDE  
Introduction  
How to Use This Guide  
This guide provides the information you need to  
install and configure the SuperStack II™ Switch 2000  
TR (3C510600) into your Token Ring network for  
maximum benefit.  
This table lists where specific information can be found.  
Chapter  
Information  
1
Overview  
2
Getting Started  
This guide is intended for use by network administra-  
tors responsible for installing and setting up network-  
ing equipment. It assumes a basic working  
knowledge of Local Area Networks and Token Ring in  
particular.  
3
Setting Up Management  
Configuring with the VT100 Interface  
Configuring with the LCD Console  
Monitoring the Switch 2000 TR  
Virtual LANs  
4
5
6
NOTE: If the information in the release notes shipped  
with the Switch 2000 TR differs from the information  
in this guide, follow the release notes.  
7
Appendix  
A
B
C
D
E
Software Upgrade Utility  
Screen Access Rights  
Serial Port Cable Pin-outs  
Troubleshooting  
Technical Specifications  
Technical Support  
F
Conventions  
The following tables list icon and text conventions  
that are used throughout this guide.  
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2
ABOUT THIS GUIDE  
Table 1 Notice Icons  
Related Publications  
Icon  
Type  
Description  
Within the Switch 2000 TR document set:  
Information  
Note  
Information notes call attention to impor-  
tant features or instructions.  
Switch 2000 TR Quick Reference Guide. (Part  
Number #99033)  
Caution  
Cautions contain directions that you must  
follow to avoid immediate system damage  
or loss of data.  
Switch 2000 TR User Guide. (Part Number #99032)  
Switch 2000 TR Release Notes. (Part Number  
Warning  
Warnings contain directions that you must  
follow for your personal safety. Follow all  
instructions carefully.  
#99034)  
SuperStack II Switch 2000 TR ATM OC-3 Module  
User Guide (Part Number #99041)  
Table 2 Text Conventions  
Convention Description  
SuperStack II Switch 2000 TR FDDI Module User  
Guide (Part Number #99048)  
SuperStack II Switch 2000 TR TR-in-FE Module  
Italics  
Italics are used for emphasis or to denote new terms.  
User Guide (Part Number #99045)  
“Enter” vs.  
“Press”  
The word “enter” means to type something and then  
press the Return or Enter key. Do not press the Return  
or Enter key when an instruction simply says “press.”  
Text repre-  
sented as  
screen  
This typefaceis used to represent displays that  
appear on your terminal screen; for example:  
Select a menu option  
display  
Keys  
When specific keys are referred to in the text, they are  
called out by their labels, such as the “Return key” or  
the “Escape key,” or they may be shown as [Return]  
or [Esc].  
If two or more keys are to be pressed simultaneously,  
the keys are linked with a plus sign (+); for example:  
Press [Ctrl]+[Alt]+[Del].  
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1
OVERVIEW  
This chapter describes the major features, compo-  
nents, and concepts of the Switch 2000 TR, including:  
About the SuperStack II Switch 2000 TR  
The SuperStack II Switch 2000 TR is a multiport inter-  
networking switch for Token Ring networks.  
Designed to satisfy the high demand for bandwidth in  
expanding Token Ring networks while preserving the  
investment in existing equipment, the Switch 2000 TR  
provides a natural migration path for network growth  
and high-speed technologies, including ATM and  
FDDI.  
About the SuperStack™ II Switch 2000 TR  
Summary of Features  
Typical Applications of Token Ring Switching  
The Front Panel  
The Rear Panel  
Optional Slide-In Modules  
Token Ring Switching Concepts  
The Switch 2000 TR is a 12-port Token Ring stackable  
switch that supports throughput rates of more than  
400,000 packets per second. Designed to fit comfort-  
ably within the data center or the workgroup environ-  
ments, the Switch 2000 TR supports up to 72 rings  
per stack at 4 or 16 Mbps.  
System Benefits  
Network segmentation—When used in place of  
low- performance PC bridges or routers, the  
Switch 2000 TR provides a simple method for seg-  
menting Token Ring networks into smaller, more  
manageable workgroups.  
Increased bandwidth—A key benefit of segmen-  
tation is reduced traffic load, which translates into  
increased bandwidth and improved manageability.  
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1-2  
CHAPTER 1: OVERVIEW  
Port population—High density port population  
relieves traffic congestion and supports 4 and 16  
Mbps data rates. In addition, the Switch 2000 TR  
has four custom-configurable ports designed for  
direct workstation or dedicated server connection.  
The ATM module supplies 155 Mbps UNI inter-  
face, and retains all virtual LAN emulation con-  
figuration data, provides ATM signaling, and  
offers standard LAN emulation.  
The TR-in-FE module combines Token Ring and  
Ethernet for the purpose of utilizing Fast Ether-  
net as a backbone and method of server attach-  
ment for Token Ring networks. Through a  
process known as tunneling or encapsula-  
tion, TR-in-FE uses Fast Ethernet to transport  
natively formatted Token Ring frames.  
Network management—Switch 2000 TR is sup-  
®
ported by the Transcend Enterprise Manager  
applications for UNIX and Microsoft Windows  
®
95 . Both network management applications pro-  
vide Simple Network Management Protocol  
Remote Monitoring Management Information  
Base (SNMP RMON MIB) data using an intuitive  
graphical interface to report historical and perfor-  
mance statistics.  
High-speed Cascade Interface—The high-speed  
cascade interface enables multiple Switch 2000  
TRs to connect to form a single, large switched  
domain while reducing the cost typically incurred  
with FDDI or ATM functionality. This connection  
allows as many as six Switch 2000 TRs to be  
stacked.  
System Features  
Congestion Control—The Congestion Control  
feature optimizes available buffer space in the  
Switch 2000 TR by using the buffering ability in all  
Token Ring end stations. This is especially useful  
when many ports are transmitting to a common  
port such as a server connection. Having conges-  
tion control eliminates the chances of dropped  
packets in high-traffic client-server environments.  
VLAN Support—The Switch 2000 TR supports vir-  
tual LAN (VLAN) operation by allowing any switch  
port to become a member of any one of 15 unique  
VLANs (workgroups). By establishing VLANs, LAN  
administration tasks such as adds, moves, and  
changes become easier while bulk downloads and  
configurations remain across workgroups. VLANs  
also enhance security and increase network effi-  
ciency by controlling traffic flow and containing  
broadcasts. VLANs are preserved over the High  
Speed Cascade Interface. In addition, indus-  
try-standard LAN emulation over ATM provides a  
method for creating enterprise-wide virtual LANs  
that reflect how networks actually function.  
Slide-in Option Slot—Optional downlink mod-  
ules are available for the Switch 2000 TR. These  
modules provide downlinks to high-speed back-  
bones such as FDDI, ATM, and Fast Ethernet.  
The FDDI module supplies a 100 Mbps point of  
aggregation for multiple Token Ring switched  
segments and supports either Single Attached  
Stations (SAS) or Dual Attached Stations (DAS).  
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Summary of Features  
1-3  
Roving Analysis—The Roving Analysis Port (RAP)  
feature allows you to configure the SuperStack II  
Switch 2000 TR to capture and monitor traffic on  
any Token Ring LAN connected to the switch using  
any industry-standard LAN analyzer.  
Summary of Features  
12 switched shielded RJ-45 Token Ring ports  
4 ports selectable for direct end station attachment  
High-speed cascade interface  
This feature operates on Port 1 of the Switch 2000  
TR and applies to all ports of the same switch. To  
view traffic on other switches in a stack you must  
connect to Port 1 of the appropriate switch and  
select the port you wish to view.  
Front Panel LCD Console for fast configuration  
Flexible Option Slot for FDDI, ATM, or TR-in-FE  
expansion  
400,000 packet-per-second aggregate forwarding  
rate  
Network Analyzer  
Cut-Thru, Store-and-Forward, or Dynamic Cut-thru  
modes  
Switch 2000 TR Port 1  
(configured as Hub port)  
Low latency in cut-through mode  
SuperStack II  
Switch 2000 TR  
LINK STATUS  
green  
yellow  
=link OK  
=MGMT partition  
flashing yellow =auto error partition  
1x  
6x  
off  
=inactive  
1
1
2
2
3
3
4
4
5
5
6
6
Packet  
Status  
Power  
MGMT  
Packet  
Status  
7
7
8
8
9
9
10 11 12  
10 11 12  
O
O
C
C
7x  
12x  
ENTER  
Option Slot  
Cascade  
No forwarded errors propagated in  
store-and-forward mode  
Switch 2000 TR Port 12  
Dynamic Cut-thru monitors error rates and  
selects Cut-thru or Store and Forward as appro-  
priate  
Ring to be monitored  
Source route, transparent, and SRT bridging modes  
supported  
Figure 1-1 Roving Analysis  
IBM and 802.1d Spanning Tree protocols sup-  
ported with configurable BPDU addresses for addi-  
tional flexibility  
Congestion Control  
SNMP network management support  
®
Transcend Enterprise Manager for HP Open-  
View, NetView/6000, SunNet Manager,  
®
Microsoft Windows 95  
SmartAgent support  
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1-4  
CHAPTER 1: OVERVIEW  
SNMP over IP  
SNMP MIB II  
Bridge MIB  
SR Bridge MIB  
BOOTP  
Typical Applications of Token Ring Switching  
Token Ring switches are best suited for, although not  
limited to, expanding Token Ring networks. These  
networks demand high bandwidth, performance,  
monitoring, management, and a logical migration  
path for the continued growth of the network while  
preserving your investment in existing infrastructure.  
Switch 2000 TR Private (3Com Private)  
Part of SuperStack II architecture  
Offering a significant advantage over traditional  
inter-networking equipment, Token Ring switches  
bring immediate relief to networks, solving through-  
put and management problems. By replacing low per-  
formance two-port PC bridges or routers, Token Ring  
switching provides the ability to perform Source  
Route bridging, transparent bridging, or both with  
Source Route Transparent (SRT) bridging. The follow-  
ing illustrations depict some possible uses of the  
Switch 2000 TR, including ring segmentation and  
migration to high-speed technologies.  
Redundant Power System  
Uninterruptable Power Supply  
Integrated network management  
One RS-232 DB-9 connector for local configura-  
tion  
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Ring Segmentation  
1-5  
Ring Segmentation  
High-speed switches offer a more efficient solution over 2-port PC bridges or routers. As illustrated below, segmentation  
with a Token Ring switch brings immediate improvement over existing networks by re-distributing traffic  
.
Figure 1-2 Using Switch 2000 TR to Segment Network  
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1-6  
CHAPTER 1: OVERVIEW  
The Front Panel  
This section describes the front panel components and LEDs of the SuperStack II Switch 2000 TR. Figure 1-3 shows the front  
panel.  
LCD Status Display  
Status and Activity LEDs  
SuperStack II  
Switch 2000 TR  
Link Status  
green  
yellow  
=link OK  
=MGMT partition  
flashing yellow =auto error  
1
7
6
off  
=inactive  
6
4
4
5
1
2
2
3
3
Packet—  
Status —  
Power  
MGMT  
5
6
1
12  
12  
C
C
Packet—  
Status —  
7
7
9
9
O
O
8
8
10 11  
10 11  
12  
ENTER  
Option Slot  
Cascade  
Option Slot  
Status LEDs  
LCD Control Buttons  
Power LED  
Cascade  
Status LEDs  
12 x RJ-45 ports  
MGMT LED  
Figure 1-3 SuperStack II Switch 2000 TR Front Panel RJ-45 Ports  
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The Front Panel  
1-7  
Table 1-1 LED States  
RJ-45 Ports  
12 RJ-45 ports support unshielded Twisted Pair (UTP)  
LED Name  
Color  
Indicates  
or Shielded Twisted Pair cabling (STP) at 4 Mbps or 16  
Mbps wire speed.  
Flashing green Activity on link  
Power  
Green  
Yellow  
Off  
Power ON  
All 12 ports default to adapter mode for connection  
to a Token Ring hub. Additionally, ports 1 through 4  
can be configured to hub mode to allow direct  
attachment of workstations or servers.  
RPS w/alarm  
Operation normal  
MGMT  
Flashing green (slow) Software download  
Flashing green (fast) Power On Self Test  
(POST)  
Front Panel LEDs  
Yellow  
POST has failed  
The LEDs on the front panel of the Switch 2000 TR  
reflect the current status of the switch. Use Table 1-2  
to interpret the LED states.  
LCD Display Buttons  
Table 1-1 LED States  
Use the LCD display on the front panel of the Switch  
2000 TR to select ports, change system parameters,  
receive status information, and set the Unit ID num-  
ber.  
LED Name  
Color  
Indicates  
Packet LEDs  
Green  
Traffic present  
Error frames present  
Flashing yel-  
low  
Right and Left buttonsChange or move  
digits or go to the previous menu.  
Status LEDs  
Green  
Yellow  
Port inserted  
Up and Down buttonsScroll up or down in  
specific menu and increase or decrease digit  
value.  
Partitioned via management  
Auto Error Partition  
Flashing yel-  
low  
Enter buttonEnter a menu or use to enter  
Off  
Port not inserted  
the edit mode.  
I
Option Slot  
Sta-  
tus/Packet  
Green  
Presence of Option card  
ENTER  
Flashing green Activity on link  
Green Cascade connection present  
Figure 1-4 LCD Display Buttons  
Cascade  
Status/  
Packet  
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1-8  
CHAPTER 1: OVERVIEW  
The Rear Panel  
This section describes the rear panel components of the Switch 2000 TR. Figure 1-5 shows the rear panel.  
Reset  
IEC Power Socket  
Optional Slide-In Module Slot*  
Reset Button  
High-Speed Cascade Connectors  
Serial Number  
and Fuse Holder Redundant Power  
RS-232 Console  
System Connector  
Figure 1-5 Switch 2000 TR Rear Panel  
* Refer to the appropriate module installation manual for more information.  
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Optional Slide-In Modules  
1-9  
Power Socket  
The Switch 2000 TR automatically adjusts to the  
Optional Slide-In Modules  
Option modules provide alternate downlinks for the  
Switch 2000 TR.  
supply voltage. The fuse is suitable for both 110 AC  
and 220-240 AC operation. Refer to “Replacing the  
Fuse in Chapter 2 for information on replacing fuses.  
NOTE: Be sure the filler plate cover is installed when  
the module slot is not occupied.  
NOTE: The Switch 2000 TR has no ON/OFF switch.  
Slide-in modules are available for the following:  
Serial Number  
Refer to this number if you need to report a fault.  
The ATM Module  
The SuperStack II Switch TR ATM OC-3 module pro-  
vides a high-speed ATM connection between the  
Switch 2000 TR and ATM networks. When positioned  
in workgroup or departmental LANs, the ATM down-  
link module offers a 155 Mbps data path to building,  
campus or ATM network backbones directly from the  
Switch 2000 TR. Perfect for providing cost-effective  
ATM access to smaller isolated LANs or bandwidth  
intensive and mission critical applications, the ATM  
downlink also provides a logical migration path for  
existing Token Ring LANs to mainstream high-speed  
networking technologies.  
Redundant Power System Connector  
Use this connector to attach a Redundant Power  
System (RPS) to the Switch 2000 TR. Disconnect the  
AC plug when using an RPS.  
Reset Button  
Using the Reset button simulates a power on/off  
cycle. You can also perform a software reset using the  
VT100 interface. Refer to “Setting Up the VT100  
Console in Chapter 3.  
Redundant links can protect your Switch 2000 TR  
from network failure or equipment inconsistencies.  
The built-in Software Upgrade feature allows you to  
download software revisions easily.  
Console Port  
Use the RS-232 console port for connecting a termi-  
nal for serial remote or local out-of-band manage-  
ment and configuration. Use the following settings to  
configure the VT100:  
Benefits of an ATM  
9600 baud  
8 bit  
ATM is the only computer networking technology  
designed to carry video, voice and data traffic simul-  
taneously. ATM provides the level of service necessary  
No parity  
1 stop bit  
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1-10  
CHAPTER 1: OVERVIEW  
to run each of these bandwidth-intensive applications  
across networks.  
AAL5 ATM Adaptation Layer  
16 Virtual LANs (VLANs)  
The primary benefits of ATM include:  
Data buffer to store 40,000 ATM cells  
Wire Rate Transmission on ATM port  
ATM is a cell-based communications technology  
that easily scales from T1 or ATM 25 to OC-3 (155  
Mbps), OC-12 (622 Mbps), OC-48 (2.488 Gbps),  
and OC-192 (10 Gbps).  
Low Latency (68 microseconds between ATM and  
Token Ring components).  
3Com SmartAgent support, including:  
Additional services are easily added to existing  
SNMP management using 3Coms Transcend  
Enterprise Manager.  
ATM networks.  
ATM networks are designed for growth and pro-  
Telnet management using VT100 interface.  
vide future scalability.  
ATM provides LAN Emulation (LANE) technology  
which provides interoperability between existing  
Token Ring, Ethernet, and ATM devices.  
The FDDI Module  
The SuperStack II Switch TR FDDI module provides a  
high-speed connection between the Switch 2000 TR  
and FDDI backbone networks. When positioned in  
workgroup or departmental LANs, the FDDI downlink  
module offers a 100 MB data path to building,  
campus or FDDI network backbones directly from the  
Switch 2000 TR. Perfect for providing cost-effective  
FDDI access to smaller isolated LANs or bandwidth  
intensive and mission critical applications. The FDDI  
downlink also provides a logical migration path for  
existing Token Ring LANs to mainstream networking  
technologies.  
Summary of ATM Features  
The following list summarizes the features of the  
SuperStack II Switch 2000 TR ATM module.  
Conforms to ATM Forum Standards  
Meets OC-3c 155 Mbps interface  
SONET (STS 3c) and SDH (STM-1) compliant  
Multimode Fiber, SC connections  
LAN Emulation (LANE) version 1.0  
Redundant links can protect your Switch 2000 TR  
from network failure or equipment inconsistencies.  
The built-in Software Upgrade feature allows you to  
download software revisions easily.  
16 Emulated LAN Clients  
512 Virtual Circuits  
1024 remote MAC addresses  
User-to-Network Interface (UNI) 3.1  
Interim Local Management Interface (ILMI)  
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Optional Slide-In Modules  
1-11  
Benefits of FDDI  
The Token Ring-in-Fast Ethernet (TR-in-FE) Module  
Fiber Distributed Data Interface (FDDI) is a 100-Mbps  
fiber optic local area network standard supported by  
the ANSI committee.  
TR-in-FE is a 3Com developed technology that encap-  
sulates Token Ring frames in Fast Ethernet frames.  
Bridging the gap between Token Ring and Ethernet,  
this technology offers a more cost-effective integra-  
tion than traditional bridging and routing, and allows  
Token Ring users to expand their bandwidth while  
preserving their TR infrastructure.  
The primary benefits of FDDI include:  
A 100 Mbps point of aggregation for multiple  
Token Ring segments.  
Supports Single Attached Station (SAS) or Dual  
TR-in-FE is a unique way of combining Token Ring  
and Ethernet for the purpose of utilizing Fast Ethernet  
as a backbone and method of server attachment for  
TR networks. Through a process known as tunneling  
or encapsulation, TR-in-FE uses Fast Ethernet to  
transport natively formatted Token Ring frames. This  
means that both source route and transparent TR  
frames addressing information is maintained through  
Fast Ethernet (FE) so that it may be interpreted and  
utilized by either a destination Token Ring (TR) switch  
or FE server.  
Attached Station (DAS) functions.  
Supports server connections via Token Ring FDDI  
translation of IP, SNA, IPX, and NetBIOS.  
Additional services are easily added to existing  
FDDI networks.  
FDDI networks are designed for growth and pro-  
vide future scalability.  
Summary of FDDI Module Features  
The following list summarizes the features of the  
SuperStack II Switch 2000 TR FDDI module.  
Benefits of TR-in-FE  
TR-in-FE offers improvement in the following areas:  
Scalability  
Conforms to FDDI ANSI Standards  
Wire Rate Transmission on FDDI port  
Low Latency.  
TR switching  
3Com SmartAgent support, including:  
High-speed technologies  
Wire-speed performance  
SNMP management using 3Coms Transcend  
Enterprise Manager.  
Flexibility  
Telnet management using VT100 interface.  
High-speed flexibility (choice of D/L technology)  
Desktop flexibility (TR, Ethernet)  
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1-12  
CHAPTER 1: OVERVIEW  
Manageability  
Summary of TR-in-FE Module Features  
Simple to configure and administer  
The following lists summarize the features of the  
SuperStack II Switch 2000 TR TR-in-FE module.  
TR-in-FE allows both Token Ring and Ethernet to  
share the same Fast Ethernet physical wiring infra-  
structure and server base without impacting network  
performance. TR-in-FE accomplishes this by introduc-  
ing routing or traditional bridging via Source-Route to  
Transparent translation.  
Full duplex operation  
Automatic configuration through PCI registration  
RJ-45 connector for 100 Mbps data rates over cat-  
egory 5 UTP wiring up to 100 meters  
LEDs to indicate link integrity and link activity  
Fast Ethernet is relatively well understood and easy to  
configure. Additionally, many tools exist to manage  
and administer Fast Ethernet due to its wide accep-  
tance in the industry and its similarity to Ethernet.  
Promiscuous mode support for NDIS 3.0 and  
ODI32 drivers  
Compliance with FCC Class B, CISPR B, and CE  
Software configurable  
TR-in-FE benefits MIS managers most interested in:  
Preserving existing investments in TR infrastructure  
Seeking low-cost, high-speed connectivity  
DOS diagnostics and configuration utility  
Support for frame sizes up to 3992 bytes  
Combining Ethernet and Token Ring for common  
server access  
Fast Ethernet is less expensive than other options,  
such as FDDI and ATM. Using FE, the price per port  
for server attachment is 20% that of ATM and FDDI.  
Token Ring switching allows the install base of TR  
equipment and its configuration to remain intact and  
operational while allowing for an upgrade to higher  
performance through microsegmentation and inter-  
faces to higher speed technologies. TR-in-FE repre-  
sents one option for integrating Fast Ethernet into the  
TR switched environment.  
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Migrating to High-speed Technologies  
1-13  
Migrating to High-speed Technologies  
Managers want to migrate to FDDI, ATM, or TR-in-FE easily. Using Switch 2000 TRs, critical resources attach directly to  
high-speed technologies while preserving the investment in Token Ring hardware. They also merge easily with existing net-  
work management applications. These features allow network managers to introduce additional switches, servers, and sta-  
tions seamlessly via direct connections. Switch 2000 TRs can be contained in data centers while remaining connected to  
high-speed links with single ATM, FDDI, or TR-in-FE module.  
Figure 1-6 Using Switch 2000 TR for Migration to High-Speed Technologies  
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1-14  
CHAPTER 1: OVERVIEW  
wire speed. This 16 Mbps of bandwidth is shared  
between all stations on the ring. As applications  
become more sophisticated, or as work-stations  
become more powerful, or as the number of users  
per ring grows, the demand for bandwidth increases.  
As a result, stations are limited not by their own pro-  
cessing power but by the limitations of the physical  
network.  
High-speed Cascade Connectors  
These connectors provide a high-speed cascade con-  
nection between Switch 2000 TRs in a stack. You can  
connect multiple units to form a single switched  
domain. You can connect up to six Switch 2000 TRs  
with these connectors.  
A stack of Switch 2000 TRs act as a single multiport  
switch. The setup configuration parameters are  
shared among switches and the entire stack can be  
managed and downloaded as a single IP entity.  
In an effort to reduce the traffic per ring and increase  
the overall bandwidth availability, existing rings have  
been divided into multiple smaller rings. This division  
provides more bandwidth per station.  
Token Ring Switching Concepts  
With an optional FDDI or ATM downlink module,  
Token Ring switching also solves problems found in  
client-server applications where a shared 100 Mbps  
(FDDI) or 155 Mbps (ATM) pipeline can provide easy  
access to servers and WAN links.  
This section describes Token Ring Switching and  
unique features of the Switch 2000 TR, including:  
Why Token Ring Switching?  
Source Route Bridging  
Transparent Bridging  
Source Route Transparent Bridging  
Spanning Tree (802.1d and IBM)  
Store-and-Forward  
The major benefits of Token Ring switching are:  
Bandwidth relief  
Migration path to high-speed technologies  
Cost-effective method for achieving LAN intercon-  
nectivity  
Cut-through  
Dynamic Cut-through  
Congestion Control  
Source Route Bridging (SRT)  
Source Route Bridging is a method of allowing a ring  
station (node) on a Token Ring network to communi-  
cate with another ring station on a different ring  
interconnected by bridges. The “source” ring station,  
in other words, the node initiating the communica-  
tion, is responsible for dynamically determining and  
then maintaining information about the “route” to  
Workgroups  
Why Token Ring Switching?  
Existing Token Ring networks are built around shared  
media technology and typically operate at 16 Mbps  
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Token Ring Switching Concepts  
1-15  
the destination ring station. A route is simply the path  
a packet takes through a source route bridged net-  
work from the source ring station to the destination  
ring station.  
parallel source routing switches to provide fault toler-  
ance. In the event one switch fails, the other parallel  
switch can be configured to automatically maintain  
connectivity, providing an alternate route for data  
between the two rings.  
In a multiple ring environments, nodes on different  
rings need additional bridging information before  
they can communicate with each other. A source ring  
station must first determine if one or more routes  
exist to another station on a remote ring.  
Transparent Bridging (TP)  
Transparent bridging provides the simplest data com-  
munication method. In transparent bridging end sta-  
tions are not aware of existing intermediate bridges.  
As such, a transparent bridge learns about its sur-  
rounding network from the source addresses of the  
packets that it receives. Forwarding decisions are  
based on the destination addresses contained in the  
MAC header. Transparent bridges consult their bridg-  
ing table (see “Bridge Table) to determine which port  
should forward the traffic on to the destination port.  
In general, the source ring station determines the  
route by sending a “discovery” packet out across the  
multi-ring network. Source routing bridges forward  
this “discovery” packet while adding path informa-  
tion. Likewise, switches forward any response from  
the destination ring station to the “discovery” packet  
originator. When a source ring station receives a  
information. After determining the optimal path, the  
ring stations include the path information in every  
packet transmitted between them.  
Bridge Table  
A switch dynamically manages and updates its bridg-  
ing table. All switches receive every packet transmit-  
ted on the segments attached to its ports. As a result,  
a switch is able to “learn” the source MAC addresses  
of each station that transmits packets on its attached  
segments. Since a switch never places its own MAC  
address in a packet that it forwards, the received  
source MAC address always identifies the original  
transmitter of the packet.  
Switching provides connectivity between LANs, form-  
ing enterprise-wide networks. In a Token Ring envi-  
ronment, source routing switches connect Token Ring  
LANs and enable peer-to-peer and terminal-to-host  
communications across both local and wide area  
Token Ring networks. Both PC workgroup protocols  
and IBMs Systems Network Architecture (SNA) net-  
works are supported by source routing switches.  
A switch uses the received source address information  
to construct its bridging table. The bridging table con-  
tains a list of all received MAC addresses and the  
ports on which they were learned. From its bridging  
Another advantage of switching is that it allows the  
segmentation of the Token Ring network into multi-  
ple rings to reduce traffic on any one particular ring  
segment. The adjacent rings may be connected by  
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1-16  
CHAPTER 1: OVERVIEW  
table, a switch knows which port must be used to  
reach each known MAC address.  
802.1d Spanning Tree  
IBM Spanning Tree  
Every time a switch receives a packet, it examines its  
bridging table to determine if the source MAC  
address is contained in its bridging table. If it is not, it  
creates a new entry. The switch then searches its  
bridging table for the address contained in the  
packets destination address field. The switch then  
forwards the packet to the port associated with the  
destination MAC address. If the port specified in the  
bridging table is the same port on which the packet  
was received, the switch discards the packet.  
802.1d Spanning Tree  
Spanning Tree is an industry standard protocol  
(802.1d) which prevents redundant paths (loops)  
from existing within a network. By ensuring that only  
one active data path exists between any two rings,  
the Spanning Tree protocol prevents the following:  
Packet duplications  
Broadcast storms  
Packet misordering  
The “learned” entries in the switchs bridge table are  
subject to aging. That means that if the switch does  
not receive a packet from each entry before the  
entrys Age Timer expires, the switches bridging table  
deletes the entry. This feature allows entries associ-  
ated with dormant stations to be removed from the  
switchs bridge table.  
In addition, Spanning Tree also provides fault toler-  
ance within the network by automatically reconfigur-  
ing the active topology if a fault is detected in the  
network. This provides contingency paths in the event  
that the active path is disabled and guarantees stabil-  
ity.  
IBM Spanning Tree  
Source Route Transparent Bridging  
IBM Spanning Tree operates the same as 802.1d in  
that it resolves network loops. However, IBM Span-  
ning Tree uses different addresses and parameters  
which do not interoperate with 802.1d Spanning  
Tree.  
As the name implies, source route transparent (SRT)  
bridge performs both source routing and transparent  
bridging. If a frame with routing information is  
received at the bridge, the bridge performs source  
route bridging. Likewise, if a frame without routing  
information is received at the switch, the switch per-  
forms transparent bridging.  
The IBM Spanning Tree algorithm reduces the number  
of broadcast frames in source routed networks. A  
single path is formed between networks from the  
root bridge. IBM Spanning Tree applies only to Span-  
ning Tree Explorer frames (STEs). All Route Explorer  
frames (AREs), and Specifically Routed Frames (SRFs)  
Spanning Tree  
Spanning Tree support is provided in the Switch 2000  
TR.  
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Token Ring Switching Concepts  
1-17  
can use any path in the network. ARE packets are  
flooded through all bridges onto all rings. This creates  
multiple copies if redundant paths exist in the net-  
work.  
ery of packets with known good or free  
destinations.  
Off—In Off mode there is no congestion control.  
Packet transfers are based on queue availability in  
the receive buffer. If there is no buffer space on the  
receiving port, packets are dropped.  
When multiple requests are received at the destina-  
tion; each one causes a response. Implementing  
Spanning Tree ensures that the number of broadcast  
packets are significantly reduced.  
Forwarding Modes  
Switch 2000 TR provides three forwarding methods.  
For more information on Spanning Tree, refer to  
“Spanning Tree Fields in Chapter 4.  
Store-and-Forward—Switch 2000 TR can use a  
conventional store-and-forward method typically  
found in bridges. In this mode, packets are  
received and buffered (stored) in their entirety  
before they are forwarded. This guarantees that  
errored frames on the source ring are not for-  
warded to the destination. Although  
Congestion Control  
Congestion control prevents loss of packets due to  
congestion on destination ports. You have a choice  
among:  
store-and-forward guarantees packet stability, it  
also involves a transit delay depending on the  
length of the packet.  
Flow Control—Flow control balances the band-  
width use of the client ring to that of the server  
ring. This is especially useful in focused load condi-  
tions where many ports are sending data to a  
single port.  
Cut-thru—Cut-thru avoids the transit delay found  
in standard store-and-forward methods. Although  
cut-through can be applied only between ports  
that are operating at the same wire speed or from  
a high speed port to a low speed port, it does pro-  
vide better transit rates by forwarding a frame as  
soon as enough information is available to deter-  
mine the destination port.  
Flow control monitors buffer usage and shifts the  
load onto the end station. This allows the Switch  
2000 TR to use the available bandwidth to access  
the port by balancing traffic on the sending ports.  
Nonblocking—Occasionally packets that are des-  
tined for a particular port cannot be delivered. This  
is especially true if a ring is busy or not operating.  
These packets inadvertently impede the delivery of  
packets destined for known good or free rings.  
Nonblocking provides a means for discarding pack-  
ets that can not be delivered while ensuring deliv-  
Dynamic Cut-thru—In Dynamic Cut-thru mode  
the switch monitors error rates on the source. If a  
user set threshold is exceeded, the switch port  
changes to store and forward mode until the error  
rate reduces. At this point the port reverts to  
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1-18  
CHAPTER 1: OVERVIEW  
Cut-thru mode. The default mode for the Switch  
2000 TR is Dynamic Cut-thru.  
VLANs facilitate the administration of logical groups  
of stations that can communicate as though they  
were on the same LAN. VLANs also facilitate moves,  
adds, and changes of members of logical groups.  
VLANs  
A VLAN is defined as a group of location- and topol-  
ogy- independent devices that communicate as  
though they were on the same physical LAN. This  
means that they are not restricted by the hardware  
that physically connects them, and segments are  
defined by flexible user groups created by the user.  
For example, with VLANS, the user can define a net-  
work according to:  
Traffic between VLANs is firewalled. This limits the  
propagation of multicast and broadcast traffic  
between VLANs.  
Each distinct VLAN is uniquely identified throughout  
the bridged LAN. A consistent representation of a  
VLAN exists across a VLAN fabric (including ATM).  
This means that the shared VLAN knowledge of a par-  
ticular packet remains the same as the packet travels  
from one point to another.  
Department Groups—A VLAN could be created for  
the Marketing Department, another VLAN for the  
Finance Department, and still another for the Devel-  
opment Department.  
Hierarchical Groups—A VLAN could be created for  
directors, another for managers, and still another for  
general staff.  
Usage Groups—A VLAN could be created for Email  
users, another for multimedia users, and so on.  
Advantages of VLAN  
All 802 media and shared media support VLANs. In  
addition, implementing VLANs:  
Eases the change of devices  
Helps control broadcast traffic  
Provides extra security  
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GETTING STARTED  
2
This chapter describes the installation and setup pro-  
cedures for the Switch 2000 TR:  
Important Safety Information  
Important Safety Information  
Positioning the Switch 2000 TR  
Installing the Slide-in Modules  
Installing the Switch 2000 TR  
Connecting Redundant Power System  
Connecting to the Serial Port  
Device Defaults  
NOTE: Warnings contain directions that you must  
follow for your personal safety. Follow all instructions  
carefully. Please read the following safety information  
before installing the Switch 2000 TR.  
Installation or removal of any add-in module or  
cable must be performed by qualified personnel  
only.  
The Switch 2000 TR must be attached to a  
grounded power source.  
The power cord must comply with the standards of  
the country in which the Switch 2000 TR is to be  
installed.  
For USA and Canada:  
The cord must be UL-approved and CSA certi-  
fied.  
The minimum specifications for the flexible  
cord:  
No. 18 AWG  
Type SV or SJ  
3-conductor  
The cord must have a rated current capacity of  
at least 10 Amps.  
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2-2  
CHAPTER 2: GETTING STARTED  
If the power supply plug is unsuitable and you  
must replace it, refer to the following specifica-  
tions:  
Positioning the Switch 2000 TR  
The Switch 2000 TR is suited for data center and  
workgroup applications. It can be mounted in a stan-  
dard 19-inch rack, on a wall, or free-standing on a  
table or similar surface. A mounting kit with two  
brackets is provided for wall or rack mounting.  
Brown wire to the Live (Line) plug terminal. The  
terminal may be marked with the letter L or col-  
ored red.  
Blue wire to the Neutral plug terminal. The ter-  
minal may be marked with the letter N or col-  
ored black.  
Considerations for Placement  
Be aware of the following considerations when  
installing the Switch 2000 TR:  
Yellow/green wire to the Ground (earth) plug  
terminal which may be marked with the letter  
(E) or the earth symbol or colored yellow/green.  
Can cable lengths and media be supported prop-  
erly?  
The Switch 2000 TR operates under SELV condi-  
tions (Safety Extra Low Voltage) according to IEC  
950. This standard is complied with only when the  
unit is connected to equipment following the same  
standard.  
Is cabling located away from sources of electrical  
noise such as radios, transmitters and other radio  
frequency equipment?  
Are all objects removed from the top of the unit or  
stack?  
Use only fuses of the same type and manufacture  
with the Switch 2000 TR.  
Is air flow adequate through the side vents?  
Is unit installed in moisture and water-proof envi-  
CAUTION: Never remove the cover. The Switch 2000  
TR contains no user-serviceable parts.  
ronment?  
CAUTION: Never remove an Optional Slide-in  
module filler plate without disconnecting the power  
source first.  
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Installing the Slide-in Modules  
2-3  
Configuration Guidelines  
The cable topology rules for Token Ring are shown  
Fuse location  
below:  
Media  
4 Mbps  
16 Mbps  
Category 3 UTP  
Category 4, 5 UTP  
Type 1 STP  
660 ft/200m  
1,320 ft/400m  
2,000 ft/600m  
330 ft/100m  
660 ft/200m  
1,000 ft/300m  
Power Supply and Fuse  
AC connector  
The Switch 2000 TR automatically adjusts to the sup-  
plied voltage. The fuse is suitable for either 90-110V  
A.C. or 220-240V A.C. A spare fuse is provided in the  
fuse drawer.  
Figure 2-1 Switch 2000 TR Fuse Location  
3 Slide out the fuse holder drawer and remove the fuse.  
Replacing the Fuse  
4 Install the replacement fuse and close the fuse  
drawer.  
Refer to Figure 2-1 for the location of the fuse. When  
necessary, replace the Switch 2000 TR fuse with a  
fuse that has the following specifications:  
5 Re-insert the power cord and apply power.  
250 volts — 4A Slo-Blo  
Installing the Slide-in Modules  
1 Power down the Switch 2000 TR by removing the AC  
This section explains how to install the three optional  
modules into a SuperStack II Switch 2000 TR device.  
The modules are:  
power cord or the Redundant Power System cords.  
2 Gently pry open the fuse holder cover with a small  
flat-blade screwdriver.  
ATM  
FDDI  
TR-in-FE  
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2-4  
CHAPTER 2: GETTING STARTED  
CAUTION: Always follow Electrostatic Discharge  
(ESD) procedures when installing an I/O Module.  
1 If the Switch is connected to the network, turn off the  
power and disconnect the switch from the main  
power supply and the network.  
2 Place the Switch on a flat, clean, hard, work surface.  
3 Locate and remove the blanking plate that covers the  
slot. See Figure 2-2. Retain the blanking plate and the  
screws for future use.  
TokenRing-In-FastEthernetModule  
3C510620  
Rx  
Tx  
Board postions with  
electronics facing down  
FullDuplex  
PortStatus  
Tx  
Rx  
Reset  
ConsolePort  
9600,8,1,N  
4 Use the guide rails within the Switch slot to align the  
module. The location of the guide rails and the cor-  
rect positioning of the plate is shown in Figure 2-2.  
5 Slide the module into the slot without touching the  
top or bottom of the circuit board, which positions  
upside down on the plate. Ensure that the module is  
pushed fully into the unit.  
Figure 2-2 Inserting a Slide-in Module into a Switch 2000 TR  
6 Use the thumb screws attached to the module to fix  
the module firmly into place.  
7 Connect the cable to the module port.  
NOTE: For cable specifications see the guide that  
came with your module.  
8 Each end of the cable has a transmit (Tx) and receive  
(Rx) connector. Connect the Rx connector to the  
ports Tx socket. Connect the Tx connector to the  
ports Rx socket. Do the same at the other end of the  
connection.  
9 Power up the switch. The link status LED turns green  
once a valid connection is made.  
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Installing the Switch 2000 TR  
2-5  
for mounting the unit. A flat, smooth surface that is  
dry and sturdy is best.  
Installing the Switch 2000 TR  
Rack Mounting  
1 Unpack the Switch 2000 TR and place on a hard, flat  
surface.  
The Switch 2000 TR fits a standard 19-inch data com-  
munications rack typically found in wiring closets.  
2 Position one of the enclosed mounting brackets over  
the mounting holes and attach. See Figure 2-4.  
1 Unpack the Switch 2000 TR and place it on a hard,  
flat surface.  
2 Position one of the enclosed mounting brackets over  
the mounting holes and attach. See Figure 2-3.  
Figure 2-4 Wall Mounting the Switch 2000 TR  
3 Repeat the process for the second bracket.  
4 Mount the Switch 2000 TR to the wall. Be sure to  
Figure 2-3 Rack Mounting the Switch 2000 TR  
allow for adequate ventilation.  
3 Repeat the process for the second bracket.  
Stack Mounting  
4 Insert the Switch 2000 TR in the rack and secure it  
with suitable screws (not included). Be sure to allow  
for adequate ventilation.  
The Switch 2000 TR can be stacked with other com-  
ponents of the SuperStack system using the four  
enclosed self-adhesive rubber pads. Apply the rubber  
adhesive pads to the underside of the unit. Stack the  
units, ensuring that the pads of the upper unit sit in  
the recesses in the cover of the lower unit.  
Wall Mounting  
The Switch 2000 TR can be mounted to a wall with  
the enclosed brackets. Be sure that the wall is suitable  
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2-6  
CHAPTER 2: GETTING STARTED  
Connecting a VT100 Terminal  
Connecting Redundant Power System  
To connect a VT100 terminal directly to the serial port  
on the Switch 2000 TR you need a standard null  
modem cable. Follow these steps:  
To install an RPS, proceed as follows:  
1 Power down by disconnecting the AC power cord on  
the Switch 2000 TR.  
1 Connect one end of the cable to the serial port on the  
Switch 2000 TR and the other end to the serial port  
on the VT100 terminal.  
2 Connect an RPS cable assembly to the RPS connector  
on the back panel of the Switch 2000 TR.  
2 Ensure that your terminal is configured to the appro-  
3 Connect the other end of the RPS cable assembly to  
priate settings listed above.  
the RPS connector on the back panel of the RPS unit.  
Device Defaults  
Connecting to the Serial Port  
The Switch 2000 TR serial port settings are set to:  
Character size—8  
The tables list the factory defaults for the Switch 2000  
TR.  
Table 2-1 Unit Defaults  
Unit ID  
Parity—None  
#6  
Stop Bit—1  
Baud Rate—9600  
CAUTION: Setting the Unit # ensures that all configu-  
ration parameters are retained when connecting  
additional switches. Change this number to reflect  
position of switch in stack. The first (bottom) switch  
should be set to 1.  
Terminals connected to the Switch 2000 TR must be  
configured to these same settings before you can  
communicate.  
Connection to the serial port can be direct for local  
management or through a modem for remote man-  
agement.  
Table 2-2 Port Defaults  
Admin State  
Enabled  
Workgroup ID  
Personality  
Unit 1  
For more information on the serial port console, refer  
to “Setting Up the VT100 Console in Chapter 3.  
Ports 1 through 12 adapter  
Normal  
Internal Priority  
Congestion Control  
Token Priority  
Non-blocking  
Normal  
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Device Defaults  
2-7  
Speed  
16 Mbps  
Spanning Tree Support  
Disabled  
Forwarding Mode  
Cut-through  
Spanning Tree Parame-  
ters:  
802.1d  
Dynamic Cut-thru  
Rising  
20%  
10%  
Priority  
32768  
Falling  
Max Age  
20 seconds  
200 seconds  
15 seconds  
Broadcast Storm  
Rising Threshold  
Hello Time  
60%  
50%  
none  
none  
Forward Delay  
Transparent Parameter:  
Entry Age  
Falling Threshold  
Rising Action  
Falling Action  
Port Bridge Defaults  
Priority  
300 seconds  
100  
Path Cost  
62  
Attached LAN ID  
Max-Route Desc.  
STE Mode  
FFFF (hex)  
8
Auto-Span  
Table 2-3 Stack Defaults  
BootP Client  
Enable  
Table 2-4 Workgroup Defaults  
WorkGroup Name  
WGroup Created (single)  
Table 2-5 Bridge Defaults  
Number of Ports  
12  
Bridge Type  
SRT  
BPDU Address  
C0-00-00-00-01-00  
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2-8  
CHAPTER 2: GETTING STARTED  
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SETTING UP FOR MANAGEMENT  
3
This chapter describes background information for  
configuration and the procedures for initial setup of  
the SuperStack II Switch 2000 TR, including:  
Switch 2000 TR Management Options  
You manage the Switch 2000 TR using one of the fol-  
lowing communication methods:  
Switch 2000 TR Management Options  
Configuring Switch 2000 TR in Stack  
Managing over the Network  
Management Prerequisites  
Switch 2000 TR Management Consoles  
Setting Up the VT100 Console  
Setting Up the LCD Console  
Setting Up BOOTP  
Use an SNMP network manager such as Tran-  
®
scend Enterprise Manager over a network run-  
ning IP protocols. Each network manager  
application provides its own user interface.  
Use the VT100 interface for out-of-band commu-  
nications by connecting a VT100 terminal (or  
workstation with terminal emulation software) to  
the serial port of the Switch 2000 TR.  
Use the VT100 interface over a TCP/IP network for  
in-band communications using a workstation run-  
ning a VT100 terminal emulation program and Tel-  
net.  
Auto Logout  
Upgrading Software  
Resetting the Switch 2000 TR  
Use the front panel liquid crystal display (LCD) and  
associated buttons.  
The first step required for setup is assigning a Unit ID  
number which you configure with the LCD Console.  
Refer to “Management Prerequisites, Setting Unit ID”  
for instructions on assigning the Unit ID. You have  
two methods for the initial setup—VT100 or LCD  
console. When the switch has been configured for  
management, you assign the remainder of the  
parameters as described in Chapters 4 and 5.  
These communications methods are summarized in  
the following table and explained in detail in follow-  
ing sections.  
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3-2  
CHAPTER 3: SETTING UP FOR MANAGEMENT  
Table 3-1 Switch 2000 TR Management Options  
serial port or via a modem connection. This method is  
especially useful for initial setup and configuration or  
if the device is not reachable via network manage-  
ment applications.  
Access mechanism Allows you to. . .  
Using . . .  
Serial Port  
Establish an  
VT100 Console  
out-of-band connec-  
tion to the VT100 con-  
sole.  
This method allows you to manage the Switch 2000  
TR when:  
IP  
Establish in-band  
connection to the  
VT100 console  
Telnet on TCP/IP  
protocol stack  
You configure and initialize the system.  
The LAN is unable to provide reliable service.  
SNMP  
LCD  
Manage devices using  
SNMP network man-  
agement application  
SNMP on TCP/IP  
protocol stack  
The network manager does not have direct LAN  
connection.  
Set basic parameter,  
view port status, and  
set Unit ID  
Front panel  
display  
The network manager software does not support  
SNMP.  
When a connection has been established, the main  
Switch 2000 TR banner appears and you can log on.  
VT100 Management Interface  
The menu-driven interface for the Switch 2000 TR is  
known as the VT100 interface or Local Management  
interface. Using a simple series of menus, the VT100  
interface provides access to switch functions, includ-  
ing port, stack, unit, bridge, switch, and workgroup  
settings and statistics; communication parameters,  
and security levels for individual users. Refer to “The  
VT100 Console” for more information.  
Via an IP Network Connection  
Access the management interface via a Telnet utility  
over a network running TCP/IP. The console interface  
is the same as that of the interface for the serial port.  
The Telnet application requires a VT100 terminal emu-  
lation application interface.  
Before you can start a Telnet session, you must set up  
the IP parameters. To open a Telnet session, you must  
specify the IP address of the device you want to man-  
age. Up to three Telnet sessions can exist simulta-  
neously.  
You establish VT100 management communications  
with the Switch 2000 TR via the serial port or an IP  
Network connection as explained next.  
Via the Serial Port  
When a connection has been established, the main  
Switch 2000 TR banner appears and you can log on.  
Access the management interface via a VT100 termi-  
nal or using VT100 terminal emulation software. You  
can connect directly to the Switch 2000 TR using the  
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Configuring Switch 2000 TR in Stack  
3-3  
Unit ID #  
Configuring Switch 2000 TR in Stack  
Head Unit  
SuperStack II  
Switch 2000 TR  
LINK STATUS  
green  
yellow  
=link OK  
=MGMT partition  
flashing yellow =auto error partition  
1x  
7x  
6x  
off  
=inactive  
1
1
2
2
3
3
4
4
5
5
6
6
Packet  
Status  
Power  
MGMT  
Packet  
Status  
7
7
8
8
9
9
10 11 12  
10 11 12  
O
O
C
C
12x  
ENTER  
Option Slot  
Cascade  
6
5
4
3
2
SuperStack II  
Switch 2000 TR  
LINK STATUS  
green  
yellow  
=link OK  
=MGMT partition  
flashing yellow =auto error partition  
1x  
7x  
6x  
off  
=inactive  
1
1
2
2
3
3
4
4
5
5
6
6
Packet  
Status  
Power  
MGMT  
Packet  
Status  
7
7
8
8
9
9
10 11 12  
10 11 12  
O
O
C
C
12x  
ENTER  
Option Slot  
Cascade  
One of the unique characteristics of the Switch 2000  
TR is its ability to be part of a stack. When installed as  
members of a stack, up to 6 Switch 2000 TRs form  
the equivalent of a switching chassis, managed using  
the same IP address. All traffic, management, moni-  
toring, and configuration tasks and inquiries operate  
the rear of each unit. See Figure 3-1.  
SuperStack II  
Switch 2000 TR  
LINK STATUS  
green  
yellow  
=link OK  
=MGMT partition  
flashing yellow =auto error partition  
1x  
7x  
6x  
off  
=inactive  
1
1
2
2
3
3
4
4
5
5
6
6
Packet  
Status  
Power  
MGMT  
Packet  
Status  
7
7
8
8
9
9
10 11 12  
10 11 12  
O
O
C
C
12x  
ENTER  
Option Slot  
Cascade  
SuperStack II  
Switch 2000 TR  
LINK STATUS  
green  
yellow  
=link OK  
=MGMT partition  
flashing yellow =auto error partition  
1x  
7x  
6x  
off  
=inactive  
1
1
2
2
3
3
4
4
5
5
6
6
Packet  
Status  
Power  
MGMT  
Packet  
Status  
7
7
8
8
9
9
10 11 12  
10 11 12  
O
O
C
C
12x  
ENTER  
Option Slot  
Cascade  
SuperStack II  
Switch 2000 TR  
LINK STATUS  
green  
yellow  
=link OK  
=MGMT partition  
flashing yellow =auto error partition  
1x  
7x  
6x  
off  
=inactive  
1
1
2
2
3
3
4
4
5
5
6
6
Packet  
Power  
MGMT  
Status  
Packet  
Status  
7
7
8
8
9
9
10 11 12  
10 11 12  
O
O
C
C
12x  
ENTER  
Option Slot  
Cascade  
SuperStack II  
Switch 2000 TR  
LINK STATUS  
green  
yellow  
=link OK  
=MGMT partition  
flashing yellow =auto error partition  
1x  
7x  
6x  
off  
=inactive  
1
1
2
2
3
3
4
4
5
5
6
6
Packet  
Status  
Power  
MGMT  
Packet  
Status  
7
7
8
8
9
9
10 11 12  
10 11 12  
O
O
C
C
12x  
ENTER  
1 Head Unit  
Option Slot  
Cascade  
Configuration rules for the Switch 2000 TR are sim-  
ple:  
Figure 3-1 Switch 2000 TR in stack setting.  
Cascade Connections  
The head unit must have the lowest Unit ID  
number in the stack.  
Cascade connectors must attach from the top con-  
nector of bottom unit to the bottom connector of  
next highest unit, up through the stack. See  
Figure 3-2.  
The head unit should be at the bottom of the  
stack.  
It is recommended that each consecutive unit have  
sequential Unit IDs.  
To ensure redundancy each consecutive unit  
should have the same IP address setting as the  
head unit.  
Figure 3-2 Switch 2000 TR Cascade Connections  
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3-4  
CHAPTER 3: SETTING UP FOR MANAGEMENT  
Assigning unique device addresses is the responsi-  
bility of your network organization.  
Managing over the Network  
Any network manager application running Simple  
Network Management Protocol (SNMP) can manage  
the Switch 2000 TR, provided the Management Infor-  
mation Base (MIB) is installed correctly on the man-  
agement station. SNMP files for all 3Com products  
are available on the “3Com Bulletin Board Service” in  
Appendix F.  
Operating IP in a Closed Network  
If you are the manager of a network that has no con-  
nection to the outside world, you might not need  
uniquely assigned network addresses. If you are using  
the IP protocol for internal management of your net-  
work, you can assign arbitrary addresses, provided  
each device is unique.  
Network management applications provide their own  
user interface to the management facilities. 3Coms  
If you decide to use the IP protocol internally we sug-  
gest using addresses in the 192.100.X.Y, series where  
X and Y are numbers between 1 and 254.  
®
Transcend family of network managers, for instance,  
have all the facilities for managing the Switch 2000  
TR. The Switch 2000 TR supports SNMP over TCP/IP  
protocol.  
If you later connect to the outside world, you will  
have to re-assign new, valid network numbers  
assigned to your network by the NIC or other interna-  
tional organization. Refer to “Obtaining Network  
Addresses”.  
IP Addresses  
Internet Protocol (IP) addresses are designed using  
dotted decimal notation, such as n.n.n.n, where n is a  
number between 0 and 255.  
A subnet address is a filtering system for IP addresses.  
We suggest using a general mask such as  
255.255.255.0 if you are unsure what mask to use.  
A sample IP address is 192.128.40.120.  
IP addresses have two parts:  
Obtaining Network Addresses  
The first part of the address (192.128.40 in the  
example) identifies the network on which the  
device resides. Network addresses are assigned by  
international organizations. Each set of network  
numbers is unique within the context of the Inter-  
net.  
Contact one of the following organizations to obtain  
a valid set of network addresses.  
In the United States  
InterNIC Registration Services  
505 Huntmar Park Drive  
Herndon, VA 22070  
The second part of the address (.120 in the exam-  
ple) identifies the device within the network.  
Telephone number:  
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Management Prerequisites  
3-5  
1-800-444-4345, 1-619-455-4600, 1-703-742-4777  
In Europe  
Management Prerequisites  
Before you can successfully operate and manage  
the Switch 2000 TR you must assign a Unit ID  
number to the device. This section describes the  
necessary steps for assigning a Unit ID#.  
RIPE NCC  
Kruislaan 409  
NL-1098 SJ  
Amsterdam  
The Netherlands  
Telephone number:  
The only method for assigning a Unit number is via  
the LCD Console located on the front panel of the  
Switch 2000 TR.  
+31 20 592 5065  
Locate the LCD Console and proceed as follows:  
In Asia Pacific  
1 Power on the Switch 2000 TR.  
Asia Pacific Network Information Center (APNIC-DOM)  
c/o Computer Center, University of Tokyo  
2-11-16 Yayoi  
Switch 2000 TR>Unit ID 6 appears in the LCD Console.  
This is the factory default.  
Bunkyo-ku, Tokyo 113  
Japan  
2 Press [Enter] to enter the working menu of the LCD  
Console.  
Telephone number:  
Switch 2000 TR>Unit appears.  
3 Press [Enter].  
+81 3 3580 3782  
UNIT>Unit # appears.  
4 Press [Enter].  
Unit #>6 appears.  
5 Press the [Down Arrow] once. The number 1 appears.  
6 Press [Enter]. The Unit ID number has now been set.  
7 Press [Left Arrow] twice to return to the main LCD  
Console menu.  
Continue with the management setup as described in  
the remainder of this chapter.  
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3-6  
CHAPTER 3: SETTING UP FOR MANAGEMENT  
Source Routing Prerequisites  
Switch 2000 TR Management Consoles  
If you plan to operate the Switch 2000 TR in a source  
routing environment, you need to assign a segment  
ID. Follow the instructions below, from the Port Setup  
screen:  
The following sections describe how to get started  
managing your Switch 2000 TR. If you plan to  
manage the Switch 2000 TR using IP or SNMP, you  
will have to assign an IP address to the Switch 2000  
TR using one of these interfaces:  
1 Select Bridge from the bottom of the Port Setup  
screen.  
VT100 Console Interface. See Chapter 4.  
LCD Console Interface. See Chapter 5.  
The Port Bridge Setup screen appears.  
BootP may also be used to assign IP address. Refer  
to “Setting Up BOOTP”.  
The VT100 Console  
This section describes the screen conventions used in  
the Switch 2000 TR VT100 console interface. The  
VT100 interface allows you to set and/or view these  
switch parameters:  
IP and associated addresses and management  
Port personality, speed, and state  
Figure 3-3 Port Bridge Setup Screen (Attached LAN ID Setting)  
Bridge type, bridge number and Spanning Tree  
state  
2 Assign an Attached LAN ID under the Source Routing  
Switch 2000 TR status and hardware and software  
heading on the right side of the screen.  
version numbers  
The Attached LAN ID is set to FFFF which is the  
default setting for “not assigned.”  
Choice Field  
Example display:  
*text*  
You must assign a value to this field to perform  
source routing. Refer to “Setting Source Route Bridg-  
ing in Chapter 4 for more information.  
Text enclosed with asterisks is a list from which you  
can select one option. Press [Space] to cycle through  
the options. When your choice is highlighted press  
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Switch 2000 TR Management Consoles  
3-7  
[Down Arrow] or [Return] to move to the next field.  
Refer to “Switch 2000 TR VT100 Console Interface  
Menu Map”.  
A list box allows you to select one or more items from  
a list. These keys allow you to select from a list:  
[Return]—moves the cursor to the next field. Car-  
ries out a buttons action.  
Entry Field  
Example display:  
[text]  
[Space Bar]moves through a text list for a field.  
Use it to highlight the item or value you want.  
[Down Arrow]—moves down a list item by item  
Text enclosed in square brackets on the screen indi-  
cates a text entry field. This field may be text, numeric  
data, or hexadecimal data.  
and starts over again at the top.  
[Ctrl] + [U]—moves the cursor one screen up the  
list box.  
Password fields are hidden, meaning the text you type  
is not shown on the screen.  
[Ctrl] + [D]—moves the cursor one page down the  
list box.  
In some cases an Entry field has a default entry. To  
change the default value, simply type in a new value  
for this field and the default entry will be erased.  
Press [Down Arrow] or [Return] to move on to the  
next field.  
Key Board Shortcuts  
Here are some shortcuts you can use to navigate  
within the console screens:  
[Tab]—Moves from one field on a form to the next  
on any screen without making a change.  
Button  
[Return]—Moves you to the next form field after  
Example display:  
you have made an entry.  
OK  
[Left Arrow]—Moves you to the previous field on  
the screen or the previous character in an editable  
field.  
Text for button is always shown in uppercase letters.  
Buttons carry out actions. For example OK: or CAN-  
CEL. To select a button, move the cursor to the  
button and press [Return].  
[Right Arrow]—Moves you to the next field on  
the screen or the next character in an editable  
field.  
List Boxes  
[Ctrl] + [R]—Refreshes the screen.  
Example display:  
[Ctrl] + [B]—Moves the cursor to the next button.  
[Ctrl] + [P]—Returns to the previous screen.  
monitor, manager, or security  
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3-8  
CHAPTER 3: SETTING UP FOR MANAGEMENT  
[Ctrl] + [N]—Moves to the next screen after imple-  
menting current screen settings.  
[Ctrl] + [K]—Displays list of key strokes.  
Correcting Text Entries  
Use [Delete] on a VT100 terminal or [Backspace] on a  
PC. This key moves the cursor one space to the left  
and deletes a character. To delete more than one  
character, press the key once for each character.  
NOTE: Check carefully before using the Control keys.  
If you are using Telnet or a terminal emulation pro-  
gram you may find that some Control keys do not  
work the same or that they control other functions.  
Refer to the documentation that accompanies your  
Telnet or terminal emulation software.  
Default Users  
Three default user types are allowed by the resident  
management console. They cannot be deleted or  
altered by the network administrator. Refer to  
Table 3-2 for default names and passwords. Refer to  
Appendix B for a listing of Screen Access Rights.  
Table 3-2 Default User Names and Passwords  
Default Name  
monitor  
Password  
monitor  
manager  
security  
Access Level  
monitor  
manager  
manager  
security  
security  
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VT100 Console Menu Map  
3-9  
VT100 Console Menu Map  
Figure 3-4 displays the menu structure for the Switch 2000 TR VT100 console interface.  
Switch 2000  
Main Banner  
Switch 2000  
Logon  
Switch 2000  
Main Menu  
Quick  
Config  
User  
Access  
Levels  
Switch  
Management  
Software  
Upgrade  
Management  
Setup  
Remote  
Poll  
Status  
Initialize  
Reset  
Logoff  
Bridge  
Config  
Fault  
Log  
Local  
Security  
Poll  
Setup  
Traps  
Stack  
TR Port  
Config  
Unit  
Port  
Create  
User  
Serial  
Port  
Delete  
Users  
Change  
User  
VLAN  
Bridge  
I/O Module  
Figure 3-4 Switch 2000 TR VT100 Console Interface Menu Map  
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3-10  
CHAPTER 3: SETTING UP FOR MANAGEMENT  
4 Log on using the default name security and pass-  
word security. See Figure 3-6.  
Setting Up the VT100 Console  
This section provides instructions for setting up the  
VT100 console for local or remote management.  
1 Connect a VT100-compatible terminal to the serial  
port of the Switch 2000 TR. Configure the terminal to  
the following settings:  
9600 baud  
8 data bits  
1 stop bit  
No parity  
2 Press [Return] one or more times until the Switch  
Figure 3-6 Logon Screen  
2000 Main Banner appears. See Figure 3-5.  
5 Select OK. The Main Menu appears. See Figure 3-7.  
Figure 3-5 Main Banner  
NOTE: You cannot modify these settings. If your ter-  
minal is already set up with these values, the Main  
Banner appears as soon as power-up completes.  
Figure 3-7 Main Menu  
6 Select the Management Setup option.  
The 3Com Switch 2000 TR Management Setup screen  
appears. See “Switch 2000 TR Management Setup Fields.  
3 Press [Return] at the Main Banner.  
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Setting Up the VT100 Console  
3-11  
Switch 2000 TR Management Setup Fields  
MAC Address  
Displays the Switch 2000 TR unit MAC address.  
Locally Admin Address  
Use this field to assign locally administered addresses  
to the management port. You need to reset the  
Switch 2000 TR for the address to take effect. The  
Locally Administered Address field allows you to  
assign a unique MAC address to the unit. This feature  
is useful for identifying specific units by their  
addresses.  
Figure 3-8 Switch 2000 TR Management Setup Screen  
7 Fill in the following fields:  
Device IP Address  
To set a Locally Administered Address, take these  
steps.  
Device Subnet Mask (if applicable)  
Default Router (if applicable)  
1 Enter address in hexadecimal from the Locally Admin.  
field. This must be in the range of 400000 000000 to  
7FFFFF FFFFFF.  
8 Select OK when you have finished Management  
2 Select OK.  
Setup. You will be asked to confirm your settings.  
3 Reset the Switch 2000 TR.  
9 Press [Enter]. Settings are confirmed.  
10 Reboot the Switch 2000 TR by returning to the main  
menu and selecting RESET. See “Resetting the Switch  
2000 TR” on page 3-18.  
NOTE: The Locally Administered address will not be  
valid unless the Switch 2000 TR is reset. Refer to  
“Resetting the Switch 2000 TR” for instructions on  
resetting.  
You are now ready to communicate with the Switch  
2000 TR using IP and an SNMP-based management  
application.  
To reverse the Locally Administered address and revert  
to the resident MAC address you must enter all zeros  
and reset the Switch 2000 TR.  
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3-12  
CHAPTER 3: SETTING UP FOR MANAGEMENT  
Work Group ID  
The workgroup number for purposes of manage-  
ment. Management is only part of a single work-  
group and should be viewed as a sub-net. If you  
move your management setup to a new or different  
subnet, you will need to change the workgroup ID.  
Device IP Address  
You must assign a unique address to the device in this  
field. You change the IP address using this field.  
Device SubNet Mask  
You must assign a suitable network mask to the  
device in this field. For a class B address, 255.255.0.0  
is suitable. You change the Device SubNet Mask using  
this field.  
Default Router  
Enter the IP address of the router with which the  
Switch 2000 TR communicates. You can change the  
Default Router IP address using this field.  
NOTE: The above IP address parameters and Work  
Group ID will not be valid unless the Switch 2000 TR  
is reset.  
SETUP TRAPS  
Select this button to display the setup screen for  
SNMP trap parameters. Refer to Chapter 4.  
SERIAL PORT  
Select this button to display the setup screen for serial  
port parameters. Refer to Chapter 4.  
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The LCD Console  
3-13  
Left Arrow  
The LCD Console  
This section describes the LCD Console. The LCD  
Console allows you to enter specific configuration  
parameters and obtain status data on the Switch  
2000 TR without using a management workstation  
console or application.  
Use the left arrow to go to the previous menu.  
Right Arrow  
Switch 2000 TR  
Unit Id. 1  
Use the right arrow to move to a specific digit on any  
data field line.  
Up Arrow  
ENTER  
Figure 3-9 Switch 2000 TR LCD Console  
Use the up arrow to scroll up in a specific menu or to  
decrease the value of a highlighted digit.  
Use the left, right, up, down, and enter buttons to  
view, enter, edit, or delete configuration parameters.  
Down Arrow  
Unit ID  
IP and associated addresses and management  
Port personality, speed, state  
Use the down arrow to scroll down in a specific menu  
or to increase the value of a highlighted digit.  
Bridge type and Spanning Tree state  
Switch status; hardware and software versions  
LCD Console Buttons  
Enter  
ENTER  
Use this button to accept or change data on any field  
or scroll further down in LCD menu.  
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3-14  
CHAPTER 3: SETTING UP FOR MANAGEMENT  
LCD Console Menu Map  
Figure 3-10 displays the menu structure for the LCD console interface on the front panel of the Switch 2000 TR.  
Switch 2000 TR  
Switch 2000 TR  
Unit Id. 1  
ENTER  
ENTER  
ENTER Switch 2000 TR  
> Unit  
ENTER  
ENTER  
Unit #  
Port ID  
Port ID  
Personality  
Speed  
Port State  
Link State  
Port ID  
Personality  
Speed  
Port State  
Link State  
Personality  
Speed  
Switch 2000 TR  
> Port  
ENTER  
Port State  
Link State  
Legend:  
Module Type  
ENTER accepts  
selection and moves  
to next menu  
ENTER  
Module State  
HW Version  
ENTER  
Switch 2000 TR  
> I/O Module  
ENTER  
SW Version  
LEFT ARROW returns  
to previous menu  
Boot SW Version  
SRT  
Transparent  
Source-Route  
ENTER  
ENTER  
ENTER  
ENTER  
Switch 2000 TR  
> Bridge  
ENTER  
ENTER  
Bridge Type  
Spanning Tree  
RIGHT ARROW moves  
to next digit  
802.1d  
IBM  
Disabled  
UP/DOWN ARROWS  
scroll through a  
specific menu  
IP Mgmt  
Switch 2000 TR  
> Management  
IP Address  
Subnet Mask  
Default Router  
IP Address  
Subnet Mask  
Default Router  
ENTER  
ENTER  
ENTER  
ENTER  
IP Mgmt  
HW Version  
SW Version  
Boot SW Ver  
ENTER  
ENTER  
Switch 2000 TR  
> Status  
Confirm RESET?  
Switch 2000 TR  
> Reset  
Confirm RESET?  
Y<ENTER> : N <-  
Switch 2000 TR  
RESETTING . . . .  
Figure 3-10 Switch 2000 TR LCD Console Menu Map  
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Setting Up the LCD Console  
3-15  
A blank decimal notation appears on the IP Address.  
Setting Up the LCD Console  
3 Enter IP address as follows:  
This section provides instructions for setting up the  
LCD console for local or remote management.  
Select the value of the digit by moving the  
[Up or Down Arrow] until the desired value  
appears. Choose from 0 through 9 and “.”.  
1 Press the [Enter] button on the front panel LCD to  
enter the main menu.  
Select the next digit by moving the [Right  
Arrow].  
Switch 2000 TR  
Unit Id. 1  
NOTE: Be sure to use standard dotted decimal nota-  
tion for the IP address.  
ENTER  
4 Press [Enter] to accept the address.  
If the address is valid, you return to the previous  
menu by pressing [Enter]. If the address is invalid an  
error message displays and returns you to the previ-  
ous menu when you press [Enter].  
Figure 3-11 Front Panel LCD Main Banner  
2 Press [Down Arrow] until the Switch 2000 TR >Man-  
agement screen appears.  
5 Press [Down Arrow].  
3 Press [Enter] to enter the management menu and  
select the desired management type.  
The IP Mgmt >Subnet Mask screen appears.  
6 Press [Enter].  
At this point you can choose IP.  
If you choose IP, you need to assign an IP address,  
subnet mask and default router in order to com-  
municate with the Switch 2000 TR. Refer to “IP  
Address Setup” on.  
A blank decimal notation appears in the Subnet Mask  
field.  
7 Enter the Subnet Mask address as follows:  
Select the value of the digit by moving the  
[Up or Down Arrow] until the desired value  
appears. Choose from 0 through 9 and “.”.  
IP Address Setup  
From the Management>IP Mgmt screen, proceed  
as follows:  
Select the first digit by moving the [Right Arrow].  
8 Press [Enter] to accept the address.  
9 Press [Down Arrow].  
1 Press [Enter] to select IP address field.  
The IP Mgmt >IP Address screen appears.  
2 Press [Enter].  
The IP Mgmt >Default Router screen appears.  
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3-16  
CHAPTER 3: SETTING UP FOR MANAGEMENT  
10 Press [Enter].  
Setting Up BOOTP  
A blank decimal notation appears in the Default  
Router field.  
The BOOTP option allows you to enable or disable the  
bootstrap protocol. The BOOTP (bootstrap protocol)  
allows the switch to discover and learn its own IP  
address and routing table information. To configure a  
Switch 2000 TR with the BOOTP option you will need  
a BOOTP server program. The MAC address, recorded  
on a label on the rear panel of the Switch 2000 TR,  
must be entered in the BOOTP server program along  
with the corresponding IP address of the Switch 2000  
TR and its default route information. This allows the  
BOOTP request from the agent to be logged by the  
BOOTP server which then supplies the required IP  
information.  
11 Enter the Default Router address as follows:  
Select the value of the digit by moving the  
[Up or Down Arrow] until the desired value  
appears. Choose from 0 through 9 and “.”.  
Select the desired digit by moving the [Right  
Arrow].  
12 Press [Enter] to accept the address.  
13 Press [Left Arrow] to return to the higher level screens  
in the LCD console.  
NOTE: RESET the Switch 2000 TR for any address set-  
tings to take effect. Refer to “Resetting the Switch  
2000 TR” for instructions.  
Table 3-3  
BOOTP State IP Address Configured BOOTP Requests. . .  
Enabled  
(default)  
No  
Sent continuously (approx.  
every 512 secs.) until  
address is discovered  
You are now ready to communicate with the Switch  
2000 TR using IP and an SNMP-based management  
application. Refer to Chapter 5 for more information  
on configuring the bridge, port, and other manage-  
Enabled  
Disabled  
Yes  
Not sent, IP address is  
known  
Yes/No  
Not sent  
Follow the instructions below to set the BootP com-  
munications parameters.  
1 Log on to the Switch 2000 TR.  
2 Select Switch Management from the main menu.  
3 Select *Stack*  
4 Select Setup.  
The Stack Setup screen appears. See Figure 3-12.  
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Setting Up BOOTP  
3-17  
Figure 3-12 Stack Setup Screen (BootP Setup)  
5 (Optional) Enter a sysname for the stack.  
6 Toggle the [Space Bar] to Enable or Disable BootP.  
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3-18  
CHAPTER 3: SETTING UP FOR MANAGEMENT  
4 Press [Enter].  
Auto Logout  
You return to the screen you were viewing before the  
inactivity timer expired. Refer to Table 3-2 for pass-  
words.  
The Switch 2000 TR has a built-in auto logout feature  
which disables the VT100 interface after approxi-  
mately three minutes without keyboard activity. This  
feature provides a level of security for network man-  
agers.  
To view the Auto Logout screen proceed as follows:  
1 After approximately three minutes without keyboard  
activity from any VT100 screen the following message  
appears at the bottom of the screen:  
“Warning:Inactivity timer expiring within 10 sec-  
onds.” After the above warning is posted the follow-  
ing message appears:  
“Inactivity timer expired.”  
2 Press [Enter].  
The Auto Logout screen appears. See Figure 3-13.  
Figure 3-13 Switch 2000 TR Auto Logout Screen  
3 Enter your password.  
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Upgrading Software  
3-19  
Upgrading Software  
The Software Upgrade feature allows you to down-  
load new software images using TFTP running over  
UDP/IP.  
When 3Com Corporation issues a new version of the  
software image for the Switch 2000 TR, you can  
obtain it from the 3Com Bulletin Board Service. See  
“3Com Bulletin Board Service in Appendix F.  
You can download a version of the software image  
from a single unit in a stack. In most cases this unit  
will be the head unit. The file name “Unit # n” (see  
the Field Name field in Figure 3-14) is reserved for  
that purpose, where “n” specifies the ID of the unit  
from which the download occurs.  
Figure 3-14 Software Upgrade Screen  
3 In the Destination field, press [Space Bar] until  
*Switch 2000 TR* appears.  
The Destination field identifies the device that will  
receive the software upgrade.  
The following download procedure assumes that you  
have more than one switch in your stack and that the  
download proceeds from the head unit:  
4 Enter the name of the file in File Name field.  
This name identifies the file that contains the soft-  
ware image to be downloaded. You must place the  
image file in a location where it is accessible to the  
TFTP load request. Check with your system adminis-  
trator if you are unsure of where to place the image  
file.  
1 From the Switch 2000 TR main menu, select SOFT-  
WARE UPGRADE.  
2 Press [Return].  
The Software Upgrade screen appears. See  
Figure 3-14.  
5 Enter the address of the Server where the image is  
stored.  
The address identifies the host that contains the soft-  
ware image.  
6 Select OK.  
The software download begins. While the download  
is under way, the MGMT LED flashes green and the  
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3-20  
CHAPTER 3: SETTING UP FOR MANAGEMENT  
screen locks. When the download completes, the  
Switch 2000 TR automatically resets and re-boots  
with the new software image.  
7 In the File Name field, enter “UNIT # n”.  
Where “n” specifies the unit ID of the unit from  
which the download occurs. In most cases this unit  
will be the head unit: Unit # 1.  
This procedure downloads the software image from  
“Unit # 1” to all other units in the stack  
Upgrading Module Software  
The ATM, FDDI, and TR-in-FE Modules have their own  
software which is upgraded independently of the  
Switch software. If you own one of these modules,  
you will need to upgrade the software.  
To perform a software upgrade for a module, follow  
the steps in “Upgrading Software” above, except in  
Step 3 select ATM Module, FDDI Module, or TR-in-FE  
Module in the Destination field.  
For more information regarding these modules, see:  
SuperStack II Switch 2000 TR ATM OC-3 Module  
User Guide (Part Number #99041)  
SuperStack II Switch 2000 TR FDDI Module User  
Guide (Part Number #99048)  
SuperStack II Switch 2000 TR Token Ring-in-Fast  
Ethernet Module User Guide (Part Number  
#99045)  
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Resetting the Switch 2000 TR  
3-21  
The Switch 2000 TR resets.  
Resetting the Switch 2000 TR  
This section provides instructions for resetting the  
Switch 2000 TR.  
Because some configurable parameters require that  
you reset the Switch 2000 TR after making changes, it  
is important to understand the reset procedure before  
proceeding.  
You have four different ways to reset the Switch 2000  
TR:  
VT100 Console  
LCD Console  
Reset button  
Power cycle  
Figure 3-15 Switch 2000 TR Reset Screen  
LCD Console Reset  
When you make certain parameter changes using the  
front panel LCD console, you must commit them to  
system memory by performing a reset.  
VT100 Console Reset  
The Switch 2000 TR must be reset after making cer-  
tain changes using the VT100 interface. You may  
make more than one change before committing them  
to memory by resetting.  
To reset the Switch 2000 TR using the LCD, proceed  
as follows:  
1 Press [Up or Down Arrow] until Switch 2000  
TR>Reset appears.  
To reset the Switch 2000 TR from the VT100 interface  
when you have made changes, take these steps:  
2 Press [Enter].  
The Confirm RESET? screen appears.  
3 Press [Enter] to confirm.  
1 Select RESET from the Switch 2000 TR Main Menu.  
The Switch 2000 TR TR Reset screen appears. See  
Figure 3-15.  
If you decide not to reset at this point you may press  
[Left Arrow] to cancel and return to the previous  
screen.  
2 Select OK to confirm the reset or CANCEL to stop the  
reset. If you select OK you will be prompted to con-  
firm again.  
The Switch 2000 TR resets.  
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3-22  
CHAPTER 3: SETTING UP FOR MANAGEMENT  
Reset Button  
The Switch 2000 TR has a reset button on the rear  
panel of the unit. See Figure 3-16.  
To reset the Switch 2000 TR using the Reset button,  
proceed as follows:  
1 Locate the Reset button on the rear panel of the  
Switch 2000 TR.  
2 Press the switch once.  
Power Cord  
Reset Button  
The Switch 2000 TR resets.  
NOTE: The rear panel Reset button also provides  
access to the Emergency Software Download facility.  
Press switch twice quickly to view. Refer to  
Appendix A for more information.  
Figure 3-16 Location of Reset Button and Power Cord on the rear  
panel of the Switch 2000 TR.  
Power Cycle Reset  
The Switch 2000 TR can also be reset by removing the  
power cord from the rear panel of the unit.  
To reset the Switch 2000 TR by removing the power  
cord, take these steps:  
1 Locate the power cord on the rear panel of the Switch  
2000 TR.  
2 Remove the power cord from the power socket.  
3 Insert the power cord.  
The Switch 2000 TR resets.  
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CONFIGURING WITH THE VT100 INTERFACE  
4
The VT100 console is accessed via the serial console  
and provides access to all configuration, manage-  
ment, and monitoring facilities.  
Switch 2000  
Main Banner  
Quick Setup  
Switch 2000  
Logon  
Bridge Configuration  
Port Configuration  
Switch 2000  
Main Menu  
Port Bridge Configuration  
I/O Module Configuration  
Stack Configuration  
Create Users  
Delete Users  
Edit User  
Quick  
Config  
User  
Access  
Levels  
Switch  
Management  
VLAN Configuration  
Statistics  
Setup  
Bridge  
Config  
Stack  
Unit  
Unit Configuration  
Statistics  
SDB  
Setup  
Administrative Configuration  
About the Switch Database (SDB)  
Switch Database Configuration  
SNMP Trap Configuration  
Serial Port Configuration  
Initializing the Switch 2000 TR  
TR Port  
Config  
Statistics  
Setup  
Port  
Setup  
Setup  
VLAN  
Bridge  
I/O Module  
Figure 4-1 illustrates the portion of the VT100 inter-  
face that pertains to the configuration parameters.  
For more information on the VT100 interface, refer to  
Chapter 3.  
Statistics  
Setup  
*Switch database view  
Figure 4-1 VT100 Configuration Path  
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4-2  
CHAPTER 4: CONFIGURING WITH THE VT100 INTERFACE  
Quick Setup  
The Quick Setup option provides direct access to the  
Bridge Setup and TR Port Setup screens.  
1 Log on to the Switch 2000 TR.  
The Main Menu appears. See Figure 4-2.  
Figure 4-3 Quick Config Screen  
3 From the Quick Config screen, select either Bridge  
Setup or TR Port Setup.  
See the “Bridge Configuration” and “Port Configura-  
tion” sections for information about the setup  
screens.  
Figure 4-2 Main Menu with Quick Setup Highlighted  
2 From the Main Menu, select Quick Setup.  
The Quick Config screen appears. See Figure 4-3.  
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Bridge Configuration  
4-3  
5 Select OK.  
Bridge Configuration  
6 Select *SRT*. Press [Space Bar] to change.  
7 Press [Return].  
The bridge configuration section includes information  
on the following:  
8 Select *IBM*, *802.1d*, or *disabled* in the Span-  
ning Tree Support field. A BPDU value is automatically  
assigned:  
Source Routing Transparent (SRT)  
Source Route (SR)  
Transparent (TP)  
802.1d Spanning Tree—80-01-43-00-00-00  
IBM Spanning Tree—C0-00-00-00-01-00  
Spanning Tree Fields  
9 Assign a Bridge Number. Enter in Hex. Choose from 0  
Setting Source Routing Transparent (VT100)  
to f.  
NOTE:This bridge setting requires that you reset the  
switch. Refer to “Resetting the Switch 2000 TR in  
Chapter 3 for instructions.  
10 Select OK.  
11 From the Main Menu, press [Space Bar] until *Port*  
appears. Select the proper unit and port ID to config-  
ure.  
1 Log on to the Switch 2000 TR.  
12 Select SETUP. The TR Port Setup screen appears. See  
2 Select Switch Management from the Main Menu.  
3 Press [Space Bar] and select *Bridge*.  
Figure 4-5.  
4 Select SETUP. The TR Bridge Setup screen appears.  
Figure 4-5 TR Port Setup Screen  
Figure 4-4 TR Bridge Setup Screen  
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4-4  
CHAPTER 4: CONFIGURING WITH THE VT100 INTERFACE  
13 At the bottom of the TR Port Setup screen, select  
BRIDGE. The Port Bridge Setup screen appears. See  
Figure 4-6.  
7 Assign a Bridge Number. Enter in Hex from 0 to F.  
8 In the Max Age field, type 6.  
9 In the Forward Delay field, type 4.  
10 Select OK.  
11 In the TR Management screen, press [Space Bar] until  
*Port* appears. Select SETUP. The TR Port Setup  
screen appears.  
12 At the bottom of the TR Port Setup screen, select  
BRIDGE. The TR Port Bridge Setup screen appears.  
13 In the attached Lan Id field, enter a LAN ID in hex  
(0-FFF).  
NOTE:A value of FFFF indicates an unassigned LAN  
ID. Use FFFF if the port is either unused or attached to  
a transparent-only segment.  
Figure 4-6 Port Bridge Setup Screen  
14 In the Attached LAN ID field, enter the LAN ID in hex.  
15 From the STE Mode field, select *Auto-Span*.  
16 Select OK. Repeat for all ports as desired.  
14 In the STE Mode field, select *Auto-span*.  
15 Select OK. Repeat for all ports as desired.  
Setting Transparent Bridging  
Setting Source Route Bridging  
NOTE:This bridge setting requires that you reset the  
switch. Refer to “Resetting the Switch 2000 TR in  
Chapter 3 for instructions.  
1 Log on to the Switch 2000 TR.  
2 From the Main Menu, select Switch Management.  
3 Press [Space Bar] and select *Bridge*.  
4 Select SETUP. The TR Bridge Setup screen appears.  
1 Log on to the Switch 2000 TR.  
2 From the Main Menu, select Switch Management.  
5 In the Bridge Type field, select *Source-route only* by  
3 Press [Space Bar] and select *Bridge*. The TR Bridge  
toggling the [Space Bar].  
Setup screen appears.  
6 In the Spanning Tree Support field, select *IBM*. The  
BPDU value is automatically assigned:  
C0-00-00-00-01-00  
4 In the Bridge Type field, select *Transparent-only*.  
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Bridge Configuration  
4-5  
5 In the Spanning Tree field, select *802.1d* to enable  
802.1d compliant Spanning Tree for the Switch 2000  
TR. The BPDU value is automatically assigned:  
80-01-43-00-00-00.  
Bridge Hello TimeThe period of time between  
the generation of configuration messages by a  
root bridge is known as Hello Time.  
In networks where the probability of losing config-  
uration messages is high, a short Hello Time is  
desirable. In networks that are fairly stable, a  
longer time lowers the overhead of the Spanning  
Tree algorithm.  
6 Select OK. Repeat for all ports as desired.  
Spanning Tree Fields  
Spanning Tree is an algorithm designed to eliminate  
loops in networks. The algorithm detects and logically  
prohibits redundant paths by placing some bridge  
ports in the blocking state so that only one route exits  
between any two LANs and therefore any two sta-  
tions. After Spanning Tree eliminates redundant  
paths, the network reconfigures and stabilizes. Any  
time the network topology changes the algorithm  
automatically re-learns the new configuration and  
adjusts the bridge ports accordingly. This guarantees  
that all stations are connected.  
Bridge Max. AgeMaximum Age determines  
the amount of time the current Spanning Tree con-  
figuration data is judged too old and discarded  
from the Switch 2000 TRs memory. Maximum Age  
should never be reached in a properly configured  
Spanning Tree.  
If this value is too small, the Spanning Tree must  
configure too frequently. If this setting is too high  
the network requires more time to adjust to  
changes in the topology.  
Forward DelayThe Forward Delay value deter-  
mines the amount of time the Switch 2000 TR  
spends in the “listening “and “learning” states.  
This prevents the forwarding of data packets until  
all parts of the topology have been notified of a  
change in the topology.  
Spanning Tree Parameters  
The following parameters are components of the  
Spanning Tree algorithm. These are set to factory  
defaults.  
PriorityThis setting influences the choice  
between the root bridge and the designated  
bridge. The bridge with the lowest priority is the  
one most likely to be used as the root bridge by  
Spanning Tree.  
A low value can result in temporary loops as the  
Spanning Tree reconfigures the topology. A setting  
that is too high forces the network to wait longer  
for Spanning Tree to reconfigure the topology.  
Entry Age—The period of time that must  
expire between sends before a MAC address is  
“aged out” (removed) from the switch data  
base (transparent bridging table).  
NOTE:For more information on Spanning Tree and  
bridging concepts refer to Interconnections:Bridges  
and Routers by Radia Perlman. Addison-Wesley Pub-  
lishing Company, Reading MA. © 1992.  
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4-6  
CHAPTER 4: CONFIGURING WITH THE VT100 INTERFACE  
3 Press [Space Bar] and select *Port*.  
4 Enter the desired port and unit ID.  
Port Configuration  
The Port configuration section includes directions for  
configuring ports of the Switch 2000 TR, including:  
5 Select SETUP. The TR Port Setup screen appears.  
Admin State  
VLAN ID  
Port Personality  
Internal Priority  
Congestion Control  
Token Priority  
Speed  
Forwarding Mode  
Cut-Thru Threshold%  
Locally Administered Address  
Broadcast Storm Control  
Port Bridge Settings  
Spanning Tree Fields  
Figure 4-7 TR Port Setup Screen  
Setting the Port Admin. State  
Use the Admin. State field to enable or disable indi-  
vidual ports.  
1 Set this field by toggling the [Space Bar].  
2 Press [Return].  
NOTE:All settings in the Port Setup screens are “live”  
settings. They take effect immediately unless other-  
wise noted.  
Setting VLAN ID  
For more information on the port, refer to “Port Sta-  
tistics in Chapter 6.  
The VLAN ID field allows you to assign ports to a  
VLAN (workgroup) which can only communicate with  
other ports in the same VLAN. You have the ability to  
assign ports to up to 15 separate VLANS. VLANs are  
Setting Up Ports  
1 Log on to the Switch 2000 TR.  
2 Select Switch Management from the Main Menu.  
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Port Configuration  
4-7  
identified by their VLAN ID. All ports are configured  
by default to VLAN 1.  
For example: In Normal-priority a token level of 4 is  
reserved and all packets are transmitted with a token  
priority of 4 or higher, if necessary. In High-priority  
mode, a token level of 6 is reserved and all packets  
are transmitted with a token priority of 6 or higher, if  
necessary.  
1 Set this field by entering the desired VLAN number for  
the current port.  
2 Press [Return].  
If Token Priority is disabled on a port, then packets are  
transmitted from that port with the priority token  
that is available at the time. Token Priority is turned  
off if disabled.  
Setting Port Personality  
Ports 1 through 4 on the Switch 2000 TR can be set  
to *Adapter* or *Hub*. In “adapter” mode, the port  
can connect to a token ring hub such as a SuperStack  
II Hub TR. In “hub” mode, the port acts like a hub  
port and can support a directly-connected worksta-  
tion or server. Ports 5 through 12 support “adapter”  
mode only.  
1 Set this field by toggling the [Space Bar].  
2 Press [Return].  
Setting Congestion Control  
An external adapter cable can be used to directly  
attach workstations to ports 5 through12.  
Congestion Control provides a method for determin-  
ing how the Switch 2000 TR reacts in high-traffic load  
scenarios. Rather than discarding packets, this unique  
feature allows you to control the flow of traffic by  
assigning alternate methods for traffic handling.  
Choices:  
1 Set this field by toggling the [Space Bar] to your  
choice.  
2 Press [Return].  
Flow Control—Flow Control allows you to elimi-  
nate frame loss by buffering excess frames at the  
end station where space is available until the  
Switch 2000 TRs buffers are free. Once the buffers  
on the Switch 2000 TR are free, the end stations  
buffers are emptied to the Switch 2000 TR and  
packet loss is eliminated.  
Setting Port Priorities  
Switch 2000 TR has two fields for setting priority:  
Internal Priority—The Internal Priority field allows  
you to distribute the available bandwidth among  
the ports. High-priority ports are given priority  
access to internal resources, taking priority over  
Normal priority ports. Settings are High or Normal.  
Non-blocking—Non-blocking is the factory  
default state. In this mode frames are forwarded to  
available destination rings. This occurs even if a  
frame has been buffered due to a busy or down  
Token Priority—The Token Priority field deter-  
mines the priority of a token ring port on the  
Switch 2000 TR when transmitting to a segment.  
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4-8  
CHAPTER 4: CONFIGURING WITH THE VT100 INTERFACE  
ring ahead in the queue. The frame that has been  
buffered for the busy or down queue is discarded  
so that deliverable packets can proceed.  
Dynamic Cut-thru—Dynamic Cut-thru monitors  
the error rates on the port. If a user-defined thresh-  
old is exceeded, the switch port changes to  
store-and-forward until the error rate reduces.  
Once the error rate is reduced, the switch returns  
to cut-thru mode.  
DisabledIn the disabled mode, neither Flow  
Control or Non-blocking are in use.  
1 Set this field to one of the aforementioned fields by  
1 Set this field by toggling the [Space Bar].  
2 Press [Return].  
toggling the [Space Bar].  
2 Press [Return].  
Dynamic Cut-Thru Threshold%  
Setting Port Speed  
Speed sets the data rate of ports. Choices:  
The Dynamic Cut-Thru Threshold% field allows you  
to view the forwarding mode threshold percentage,  
which determines the degree to which errored pack-  
ets are allowed to pass before the Switch 2000 TR  
reverts to Store & Forward mode. These thresholds  
apply only when the Switch 2000 TR is configured in  
Dynamic Cut-thru mode. The two threshold fields are:  
16 Mbps (default)  
4 Mbps  
1 Set this field by toggling the [Space Bar].  
2 Press [Return].  
Rising ThresholdWhen this threshold is  
exceeded, the Switch 2000 TR reverts to  
Store&Forward mode.  
Setting Forwarding Mode  
Set the forwarding mode for individual ports using  
this field. Choices:  
Falling ThresholdWhen this threshold is  
crossed, the Switch 2000 TR reverts to Cut-thru  
mode.  
Store & Forward—In this mode, packets are  
received and buffered (stored) in their entirety until  
they are forwarded. Errored frames will not be for-  
warded on the source ring. Although this guaran-  
tees packet stability, it also involves a transit delay.  
Setting the Locally Admin. Address  
The Locally Administered Address field allows you to  
assign individual MAC addresses to each port. This  
feature is useful for identifying specific ports by their  
addresses.  
Cut-thru—Cut-thru avoids the transit delay found  
in standard store-and-forward methods. Cut-thru  
can only be applied between ports that are operat-  
ing at the same wire speed or from a high-speed  
port to a low-speed port.  
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Port Configuration  
4-9  
To set a Locally Administered Address, take these  
steps in the Locally Admin. field:  
Falling Threshold%  
The Falling threshold percentage setting determines  
the level at which the broadcast threshold will be  
reset. This setting prevents the rising threshold events  
from being triggered continuously. Events are only  
enabled after the Falling Threshold is met. The default  
setting is 50%.  
1 Enter address in hexadecimal.  
This should be between 400000 000000 and  
7FFFFF FFFFFF.  
2 Press [OK].  
3 Reset the Switch 2000 TR.  
1 Set the threshold fields by entering a number  
between 0 and 99.  
NOTE:The Locally Administered address will not be  
valid until the Switch 2000 TR is reset. Refer to  
“Resetting the Switch 2000 TR in Chapter 3 for  
instructions on resetting.  
2 Press [Return].  
Rising Action  
Use this field to set alarm action for the rising thresh-  
old. You have the following choices:  
To reverse the Locally Administered address and revert  
to the resident MAC address enter all zeros and reset  
the Switch 2000 TR.  
None—No action  
Event—Event generated for SNMP  
Blip—Port disabled, then enabled after 5 seconds  
Setting Broadcast Storm Control  
The Switch 2000 TR automatically creates an alarm  
on each of its ports for monitoring broadcast levels if  
an alarm is set. This field allows you to set broadcast  
threshold levels on each port. You can also set the  
threshold action per port. Thresholds are calculated  
using a moving 20 second window.  
Event+blip—Port disabled, then enabled after 5  
seconds and event generated  
Falling Action  
Use this field to set the action for the falling thresh-  
old. Choices:  
Rising Threshold%  
None—No action. Default  
Event—Event generated  
The Rising threshold percentage setting determines  
the amount of broadcast traffic that will be allowed  
before an alarm is sent. The default setting is 60%.  
1 Set the action fields by toggling [Space Bar] to the  
desired threshold actions.  
2 Press [Return].  
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4-10  
CHAPTER 4: CONFIGURING WITH THE VT100 INTERFACE  
Priority—Port priority determines the choice of  
port when the Switch 2000 TR has two ports con-  
nected to the same LAN, creating a loop.  
Port Bridge Configuration  
Set the Spanning Tree and Source Routing fields for  
the Port using the Bridge selection, located at the  
bottom of the Port Setup screen. Choices are:  
The port with the lowest value has the highest pri-  
ority and is deleted by Spanning Tree first.  
Priority  
Path Cost—Path cost determines the amount of  
overhead required to forward packets to the root  
through this port.  
Path Cost  
Attached LAN ID  
Max. Route-Desc  
STE Mode  
The higher the path cost, the less likely Spanning  
Tree will use a port for forwarding. The lower the  
cost, the more likely Spanning Tree will use a port  
for routing.  
From the Port Setup screen, perform these steps.  
3 Set the Source Routing parameters by toggling the  
1 Select *Bridge* from the lower portion of the Port  
[Space Bar] as follows:  
Setup screen.  
Attached LAN ID—A unique number that identi-  
fies the segment to which port is connected. This  
value can be set between 0 and FFF (0-4095). A  
value of FFFF (65535) indicates that no segment  
number has been assigned to this port.  
The Switch 2000 TR Port Bridge Setup screen  
appears. See Figure 4-8.  
Max. Route-Desc—This value describes the  
number of routing descriptions allowed in All  
Route Explorer (ARE) or Spanning Tree Explorer  
(STE) frames. This is also referred to as “hop  
count” limit since it limits the number of rings a  
packet can traverse.  
STE Mode—This value determines how this port  
responds when presented with Spanning Tree  
Explorer (STE) packets. Set fields accordingly by  
toggling the [Space Bar].  
Figure 4-8 Switch 2000 TR Port Bridge Setup Screen  
2 Set Spanning Tree parameters as follows:  
Disabled—Indicates that the port will not  
accept or propagate STE packets and any pack-  
ets received will be discarded.  
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I/O Module Configuration  
4-11  
Forced— Indicates that the port will always  
accept and propagate STE packets.  
Stack Configuration  
Stack configuration allows you to set these stack  
attributes:  
Auto-Span—Indicates that the port will accept  
and propagate STE packets when its Spanning  
Tree state is forwarding.  
sysName  
BootP Client  
NOTE:Spanning Tree does not have to be enabled for  
this to function correctly.  
NOTE:All settings in the Stack Setup screens are  
“live” settings. They take effect immediately.  
4 Select OK to save changes.  
For more information on the stack, refer to “Stack  
Status in Chapter 6.  
I/O Module Configuration  
I/O Module configuration allows you to set up for the  
following module options:  
Setting Up the Stack  
1 Log on to the Switch 2000 TR.  
FDDI  
2 Select Switch Management from the Main Menu.  
3 Press [Space Bar] and select *Stack*.  
ATM  
TR-in-FE  
4 Select SETUP. The TR Stack Setup screen appears. See  
Figure 4-9.  
For detailed information on configuring your module  
option, see their respective manuals:  
SuperStack II Switch 2000 TR ATM OC-3 Module  
User Guide  
SuperStack II Switch 2000 TR FDDI Module User  
Guide  
SuperStack II Switch 2000 TR TR-in-FE Module  
User Guide  
Figure 4-9 TR Stack Setup Screen  
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4-12  
CHAPTER 4: CONFIGURING WITH THE VT100 INTERFACE  
Setting sysName  
The sysName field allows you to assign an identifying  
name to the stack. This name is displayed on the top  
level form.  
1 Enter any combination of up to 30 alpha or numeric  
characters as an identifier. Spaces are allowed.  
2 Select OK.  
BOOTP Client  
If BOOTP Client is enabled and you have a BootP  
server on your network, an IP address will be assigned  
automatically to the Switch 2000 TR at power up.  
Figure 4-10 VLAN Setup Screen  
The screen shows a listbox containing three fields:  
VLAN Configuration  
Port—This field allows you to select the ID of the  
The VLAN Setup screen allows you to:  
port that you want to set up.  
Assign ports to VLANs, if those ports use Port  
Type—This field displays information about the  
VLAN Mode  
setup of the port:  
Define a backbone port for each VLAN  
Bp—The port is a Backbone port for the  
VLAN(s) specified in the VLAN Membership  
field.  
View VLAN setup information for the Switch  
To access the VLAN Setup screen:  
A backbone port is used to connect each VLAN  
to the backbone of your network, and has the  
following attributes:  
1 From the VT100 Main Menu, select SWITCH MAN-  
AGEMENT. The Switch Management screen appears.  
2 In the Management Level field, choose VLAN.  
Addresses received on the port are not stored in  
the Switch Database.  
3 Choose the SETUP button. The VLAN Setup screen  
appears as shown in Figure 4-10.  
Frames with unknown addresses received by the  
Switch are forwarded to the port.  
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VLAN Configuration  
4-13  
ATM—The port is an ATM OC-3c Module port.  
For more information, see the SuperStack II  
Switch ATM OC-3c Module User Guide.  
APPLYThis button applies any changes to the VLAN  
database.  
VLAN LEC Setup—If the port is an ATM OC-3c  
Module port, this button allows you access the VLAN  
LEC Setup screen for extending your VLANs into an  
ATM network. For more information, see the Super-  
Stack II Switch ATM OC-3c Module User Guide.  
VLAN Membership—This field displays the ID of  
the VLAN(s) to which the port belongs.  
Port ID—This field displays the ID of the port  
currently selected in the listbox.  
VLAN IDThis field allows you to enter the ID  
of the VLAN to which the port is assigned. All  
ports by default belong to VLAN 1.  
Assigning a Port to a VLAN  
1 In the Port ID field, type the ID of the required port.  
2 In the VLAN ID field, type the ID of the required  
Backbone Port—If the port specified in the Port ID  
field uses Port VLAN Mode, this field allows you to  
specify whether the port is a backbone port. Any port  
in a VLAN can be designated as the backbone port for  
that VLAN, but you can only have one backbone port  
per VLAN. By default, all ports belong to the Default  
VLAN (VLAN 1). Because of this, an unconfigured  
Switch unit can only have one backbone port.  
VLAN.  
3 Select APPLY.  
CAUTION: Initially, all Switch ports belong to the  
Default VLAN (VLAN 1). This VLAN is the only VLAN  
which allows an SNMP Network Manager to access  
the management agent of the unit. If you remove all  
ports from VLAN 1, then an SNMP Network Manager  
cannot manage the Switch.  
If you specify that an ATM OC-3c Module port is a  
backbone port, the port becomes a backbone port for  
all the VLANs on which it is active. It cannot be the  
backbone port for one VLAN and a standard port for  
another.  
Specifying a Backbone Port  
1 In the Port ID field, type the ID of the required port.  
2 In the VLAN ID field, type the ID of the required  
VLAN.  
NOTE: If you fit a Plug-in Module into a Switch with  
no specified backbone ports, the Module automati-  
cally becomes the backbone port for the Default  
VLAN when you power up or initialize the Switch. If a  
Switch has no Plug-in Module, the high speed cas-  
cade interface becomes the backbone port for the  
Default VLAN when you power up or initialize the  
Switch.  
3 In the Select Port Type field, select Backbone Port.  
4 Select APPLY.  
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4-14  
CHAPTER 4: CONFIGURING WITH THE VT100 INTERFACE  
Unit Configuration  
Unit configuration allows you to view these unit  
parameters:  
Unit ID  
Unit Name  
Port Capacity  
Option Slot  
Power Supply  
Figure 4-11 TR Unit Setup Screen  
For more information on the unit, refer to “Unit Sta-  
tistics in Chapter 6.  
Unit Name  
Unit Name identifies the type of unit.  
Setting Up the Unit  
1 Log on to the Switch 2000 TR.  
For example: Switch 2000 TR  
2 Select Switch Management from the Main Menu.  
3 Press [Space Bar] and select *Unit*.  
Port Capacity  
Indicates the number of ports on a unit.  
4 Enter the ID of the unit you wish to set up.  
Option Slot  
5 Select SETUP. The TR Unit Setup screen appears. See  
Figure 4-11.  
Identifies any module options activated within the  
unit.  
Unit ID  
Power Supply  
The Unit ID identifies the number of the unit for pur-  
poses of network management. If you are managing  
the Switch 2000 TR using Transcend Enterprise Man-  
ager, this ID allows you to identify the unit in a stack.  
Unit number 1 appears at the bottom of the stack.  
Unit number 6 appears at the top of the stack.  
Identifies the power source as follows:  
Internal—Through the internal power supply of  
the Switch 2000 TR.  
External—Through a Redundant Power System  
(RPS).  
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Administrative Configuration  
4-15  
Power On Self Test  
Administrative Configuration  
Use this field to specify the type of self-test to run at  
start-up:  
This section provides information on the Administra-  
tive settings for the Switch 2000 TR.  
Normal—A 10 second test that verifies the Switch  
1 Log on and select USER ACCESS LEVELS from the  
Main Menu. The TR User Access Levels menu appears.  
See Figure 4-12.  
2000 TRs basic functions.  
Extended—A more comprehensive test that lasts  
up to 300 seconds.  
Roving Analysis  
Use the following fields to set up the Roving Analysis  
function:  
Administrative State—Allows you to *enable*  
or *disable* the Roving Analysis function of port 1  
of the Switch 2000 TR. When this field is enabled,  
port 1 of the Switch 2000 TR can be connected to  
a LAN analyzer. Roving Analysis is disabled by  
default.  
Figure 4-12 TR User Access Levels Screen  
Analyzer on Port—Indicates that Port 1 is the  
analyzer port. This field cannot be changed.  
The User Access Levels menu allows you to control  
access to the Switch 2000 TR. Choices:  
Port 1 Attached to Port—Use to select the port  
you wish to analyze. Choose from ports 2 through  
12.  
LOCAL SECURITY—Allows you to view the secu-  
rity for access methods, including serial port,  
remote Telnet, and Community-SNMP.  
NOTE: The speed of the Roving Analysis Port must  
match the speed of the port you are roving into. Port  
1 returns to its original state after the Roving Analysis  
has been disabled.  
CREATE USER—Allows you to add as many as ten  
new users.  
DELETE USERS—Allows you to delete any user  
except the default users.  
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4-16  
CHAPTER 4: CONFIGURING WITH THE VT100 INTERFACE  
EDIT USERAllows you to change your password  
and community. You cannot change other pass-  
words or community strings.  
2 Select the menu item you want and see the appropri-  
ate description and instructions on the following  
pages.  
Setting Local Security  
The TR Local Security screen displays a matrix of  
access options for security levels. Choices:  
Figure 4-13 TR Local Security Screen  
MonitorAllows read-only access to a restricted  
set of manageable parameters.  
2 Fill in the fields according to these descriptions:  
Secure MonitorAllows read-only access to all  
manageable parameters.  
Serial Port—Allows or prevents access to the  
management facilities via the serial port. You can  
enable or disable access for each of the security  
levels, including, Monitor, Secure Monitor, Man-  
ager, Specialist.  
ManagerAllows read and write access to opera-  
tional parameters of the Switch 2000 TR, but not  
special or security features.  
SpecialistAllows access to most manageable  
For security reasons, the serial port access for security  
level is enabled by default and cannot be changed.  
parameters except security features.  
Security Allows access to all manageable  
Remote Telnet—Allows or prevents access to the  
management facilities via the TCP/IP Telnet proto-  
col. Because Telnet has no provision for security  
and provides access to everyone, you can disable it  
if your network has important or sensitive data.  
parameters.  
From the TR USER ACCESS LEVELS screen, take these  
steps:  
1 Select LOCAL SECURITY  
Community-SNMP—Allows or prevents access to  
the management facilities via SNMP using a  
remote network management application.  
Although SNMP has limited security features, it is  
an unsecured protocol. You can disable SNMP  
access if your network has important or sensitive  
data.  
The Local Security screen appears. See Figure 4-13.  
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Administrative Configuration  
4-17  
3 Select OK when you are finished filling in the fields.  
characters and are case-sensitive. Passwords are  
not displayed on screen.  
Creating New Users  
3 Assign access levels according to these descriptions  
and your network needs. Toggle the [Space Bar] to  
view the levels.  
Follow these steps to create new users and assign  
access levels to the Switch 2000 TR.  
Access Level—Allows you to assign access level  
for new user as follows:  
From the TR USER ACCESS LEVELS screen:  
1 Select CREATE USER.  
Monitor  
Secure monitor  
Manager  
Specialist  
Security  
The TR Create User screen appears. See Figure 4-14.  
4 Press [Return] after assigning a level.  
Community String—Assign a community string  
using any text string of 32 characters or less. The  
community string is only needed for SNMP access.  
If you are using a remote SNMP network manager,  
the community string specified in the network  
managers database must be the same as that for  
the device. The user name is the default.  
Figure 4-14 TR Create User Screen  
5 Select OK when you are finished filling in the fields.  
2 Fill in the name and password fields according to  
these descriptions and your network needs. Press  
[Return] after filling in each field.  
Deleting Users  
The following steps allow you to delete users from  
the Switch 2000 TR database. From the TR USER  
ACCESS LEVELS screen, take these steps:  
User Name—Enter a name for the new user using  
no more than 10 characters. This field is case sensi-  
tive.  
1 Select DELETE USER.  
Password—Allows you to enter the password for  
The Delete Users screen appears. See Figure 4-15.  
the new user. Passwords can contain up to 10  
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4-18  
CHAPTER 4: CONFIGURING WITH THE VT100 INTERFACE  
2 Scroll using the [Down Arrow] until you highlight the  
user you want to delete. You cannot delete default  
users or the current user (that is, yourself).  
User Name—This read-only field displays the  
name of the user. This field cannot be changed  
using this screen. To change the name of the user,  
delete the user and create a new name.  
Old Password—Enter the old password for this  
user.  
New Password—Enter the new password for this  
user.  
Confirm Password—Re-enter the new password  
for verification.  
Community String—Enter a new community  
string.  
Figure 4-15 Delete User Screen  
3 Press [Return] to delete user.  
An asterisk appears next to the name you have chosen to  
delete.  
4 Select DELETE USERS to delete the user from the User  
list.  
Editing Users and Changing Passwords  
You can edit information about existing users in the  
Switch 2000 TR database. From the TR USER ACCESS  
LEVELS screen, take these steps:  
Figure 4-16 TR Change User Screen  
3 Select OK when you have completed the changes.  
1 Select EDIT USER.  
NOTE:If you forget your password while logged into  
the Switch 2000 TR, contact your local technical sup-  
port representative for the next step.  
The TR Change User screen appears. See Figure 4-16.  
2 Fill in fields you wish to edit, including:  
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About the Switch Database (SDB)  
4-19  
time (aging time). This practice prevents the data-  
base from filling with obsolete entries. When a  
device is removed from the network, its entry is  
deleted from the database. Using an SNMP-based  
management application or the VT100 console  
(serial port or Telnet session), you can set the aging  
time (set in seconds) with a default of 5 minutes.  
Aging entries are deleted if the Switch 2000 TR is  
reset or turned off.  
About the Switch Database (SDB)  
The Switch 2000 TR supports a database of transpar-  
ent addresses received on its local ports. Using this  
information, the Switch 2000 TR determines whether  
a transparent frame should be forwarded or filtered.  
The database holds a maximum of 2000 entries, each  
of which includes the MAC address and an identifier  
for the port on which it was received.  
Permanent Entries—Permanent entries are  
retained in the database even when the Switch  
2000 TR is reset or powered down. Addresses are  
made permanent by a system administrator via a  
network manager application and the switch data-  
base. Refer to “Switch Database Configuration”  
for more information.  
to set up, maintain, and view the Switch 2000 TR  
database.  
SNMP Traps report the database status as follows:  
Database 90% full  
Database 100% full  
Database Entry Methods  
These traps indicate that the maximum number of users  
has been or is about to be met. When the maximum  
number has been met, you cannot add any more users to  
the database until some are removed. This limitation does  
not apply to users connected to the remainder of the net-  
work.  
Entries to the database happen in two ways:  
The Switch 2000 TR can learn up to 2000  
addresses. Addresses include the source MAC  
address and the port identifier of the port on  
which the source MAC address is seen. Addresses  
are not learned on the designated downlink.  
Database Entries  
The system administrator can enter and update  
entries using an SNMP MIB browser, a network  
manager application, or the Switch 2000 TR data-  
base screen. Refer to “Switch Database Configura-  
tion” for more information.  
The Switch 2000 TR database has two types of  
entries:  
Aging Entries—Initially, all entries in the database  
are the aging type. As traffic moves through the  
Switch 2000 TR, device addresses are learned and  
stored. Entries are removed (aged out) if the device  
has not transmitted any packets for a set period of  
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4-20  
CHAPTER 4: CONFIGURING WITH THE VT100 INTERFACE  
The Switch 2000 TR Unit Database View screen  
allows you to set up, maintain, and view the data-  
base. The Switching Database is distributed across the  
units in a stack. You need to choose a unit before you  
can observe the addresses learned by that unit.  
Choices:  
Adding entries to the database  
Deleting entries from the database  
Locating entries in the database  
Figure 4-18 Switch 2000 TR Unit Database View Screen  
Select SDB at the bottom of the Unit Management  
screen to access the database. See the highlighted  
field in Figure 4-17.  
When first powered up, the database appears empty.  
As addresses are learned or added, they appear in the  
scrolling list box.  
Port/MAC Address—Scrollable list box displays  
the current entries for each of the ports, except the  
downlink.  
Database Entries—Read-only field displays the  
number of entries in the database. The database  
holds up to 2000 addresses.  
MAC Address—Field displays the MAC address of  
a device highlighted in the scrollable list box. Press  
[Return] to view after you highlight an address.  
Port Number—Displays the Port Number of a  
device highlighted in the scrollable list box. Press  
[Return] to view after you highlight an address.  
Figure 4-17 TR Management Screen  
The Unit Database View appears. Refer to Figure 4-18  
and the field descriptions.  
FIND—Command allows you to locate any address  
entry in the database.  
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SNMP Trap Configuration  
4-21  
REFRESH—Command allows you to refresh the  
Finding Entries in the Database  
database and display the latest address entries.  
From the Unit Database View screen, proceed as fol-  
lows:  
INSERT—Command allows you to add an entry to  
the database.  
1 Enter the MAC address of the device you wish to find  
in the MAC Address field.  
DELETE—Command allows you to remove an  
entry from the database.  
2 Select FIND.  
The entry appears highlighted in the list box.  
Adding Entries to the Database  
From the Unit Database View screen, take these  
steps:  
SNMP Trap Configuration  
The Switch 2000 TR uses the SNMP protocol to com-  
municate across networks. Traps are messages sent to  
an SNMP management application. Typical messages  
include fault and change information.  
1 Enter the MAC address of the device you want to add  
in the MAC Address field.  
2 Enter the Port identifier of the device you want to add  
in the Port field.  
Many SNMP network management applications have  
traps that are set automatically. Check the application  
documentation.  
3 Select INSERT.  
Addresses entered using this method are permanent,  
that is, they do not age out.  
To access the Traps Setup screen, take these steps  
from the Switch 2000 TR Management Setup menu:  
4 Press [Left Arrow] to move to a different port number.  
1 Select SETUP TRAPS from the bottom of the TR Man-  
Deleting Entries from the Database  
agement Setup screen.  
From the Unit Database View screen, take these  
steps:  
The TR Trap Setup screen appears, as shown in  
Figure 4-19.  
1 Highlight the device address you wish to remove and  
press [Return], or enter the address you wish to  
remove in the MAC address field.  
2 Select DELETE.  
3 Press [Left Arrow] to move to a different port number.  
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4-22  
CHAPTER 4: CONFIGURING WITH THE VT100 INTERFACE  
Serial Port Configuration  
The VT100 interface provides a screen for setting the  
parameters of the serial port of the Switch 2000 TR.  
The serial port provides out-of-band communications  
with the Switch 2000 TR for purposes of local config-  
uration and communication.  
To view the Switch 2000 TR Serial Port Setup screen,  
proceed as follows, from the Switch 2000 TR Main  
Menu banner.  
1 Select Management Setup.  
Figure 4-19 TR Trap Setup Screen  
The Management Setup screen appears.  
2 Select SERIAL PORT.  
The TR Trap Setup screen has these fields:  
IP Address—Enter the network address of the  
remote network management station to which  
traps are to be sent.  
The Serial Port Setup screen appears. See Figure 4-20.  
Community String—Enter a 32-character text  
string for authenticating SNMP communication  
between the Switch 2000 TR and a remote net-  
work manager. The network manager and the  
Switch 2000 TR must be configured with the same  
string.  
The default community string is public.  
Throttle—Prevents a remote network manager  
from receiving too many traps at the same time.  
You can configure the Switch 2000 TR to transmit  
traps within a specific delay time period known as  
a throttle. The unit of throttle is one thousandth of  
a second. The default value is 100, which provides  
a delay of one-tenth of a second between each  
transmission.  
Figure 4-20 Switch 2000 TR Serial Port Setup Screen  
NOTE:If you change any of the serial port parame-  
ters, you will terminate any existing sessions that are  
using the serial port. Be sure that the connecting ter-  
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Serial Port Configuration  
4-23  
minal’s serial port parameters match those on the  
Switch 2000 TR. This allows you to continue to access  
the management facility from the equipment after  
you change the serial port parameters.  
modem. Refer to your terminal or modem documen-  
tation for more information.  
Auto Config  
Enabled/Disabled The Switch 2000 TR can  
auto-configure the line speed (baud) to work with  
your VT100-compatible terminal.  
The Serial Port Setup screen displays the following:  
Connection Type  
Local/remote Select Remote if you wish to manage  
the Switch 2000 TR using a modem; DCD Control  
and DSR Control will be enabled. For all other cases  
this should remain at Local.  
Speed  
1200/2400/9600/19200 Select the correct line  
speed (baud) for your terminal or modem.  
Char Size  
DCD Control  
8
Displays the character bit size for the Switch 2000  
Enabled/Disabled This field applies to local con-  
nection types. This determines if DCD needs to be  
asserted for remote connection and if the connection  
requires that DCD be released. Refer to your terminal  
or modem documentation for more information.  
TR. You should set your terminal to the same value.  
Parity  
NONE Displays the parity setting for the Switch  
2000 TR. You should configure your terminal to the  
same setting.  
DSR Control  
Enabled/Disabled This field applies only to local  
connection types. This determines if DSR needs to be  
asserted for remote connection and if the connection  
requires that DSR be released. Refer to your terminal  
or modem documentation for more information.  
Stop Bit  
1
Displays the Stop Bit setting for the Switch 2000  
TR. You should configure your terminal to the same  
setting.  
Flow Control  
XON/XOFF/NONE/RTS-CTS  
Unidirectional/RTS-CTS Bidirectional Select the  
correct flow control option for your terminal or  
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4-24  
CHAPTER 4: CONFIGURING WITH THE VT100 INTERFACE  
2 Select OK if you wish to initialize  
3 Confirm operation by pressing [Enter].  
Switch 2000 TR resets.  
Initializing the Switch 2000 TR  
The Switch 2000 TR VT100 interface allows you to  
initialize the nonvolatile memory on the unit and  
return to the factory defaults. Be aware that all con-  
figuration parameters, database entries, and setting  
will be erased and returned to the original factory-set  
defaults.  
Refer to “Device Defaults in Chapter 2 for default  
information and parameters.  
You should only initialize the Switch 2000 TR if:  
The current configuration scheme no longer suits  
your network.  
All other attempts to solve problems have not suc-  
ceeded.  
From the Switch 2000 TR Main Menu, proceed as fol-  
lows:  
1 Select INITIALIZE from the Main Menu.  
The Initialization screen appears. See Figure 4-21.  
Figure 4-21 Switch 2000 TR Initialization Screen  
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CONFIGURING WITH THE LCD CONSOLE  
5
This chapter describes the Switch 2000 TR LCD Con-  
sole management facilities and provides procedures  
for configuring and managing the device. This con-  
sole is accessed from the front panel and provides  
access to most configuration, management, and  
monitoring facilities. This chapter assumes you have  
prepared the Switch 2000 TR for management.  
Unit Configuration  
The most important task of setting up the Switch  
2000 TR is assigning a Unit ID number to the indi-  
vidual units. When installed as members of a  
stack, up to 6 Switch 2000 TRs form the equiva-  
lent of a switching chassis, managed using the  
same IP address. All traffic, management, moni-  
toring, and configuration tasks and inquiries  
operate through the high-speed cascade located  
at the rear of each unit. The Unit ID number rep-  
resents the position of the Switch 2000 TR in a  
stack. Each Switch 2000 TR must be assigned a  
unique Unit ID number. The LCD Console pro-  
vides the best method for this task.  
Unit Configuration  
Bridge Configuration  
Port Configuration  
I/O Module Configuration  
For more information on the LCD Console, refer to  
“LCD Status in Chapter 6 and “Setting Up the LCD  
Console in Chapter 3.  
To set the Unit ID number, proceed as follows from  
the Switch 2000 TR>Unit banner:  
1 Press [Enter] twice.  
2 Using the [Up or Down Arrows], set the Unit ID to #1.  
NOTE: If the unit you are configuring is to be the  
head unit, it must be the lowest number in the stack.  
3 Press [Enter] to accept (save) the Unit ID #.  
4 Press the [Left Arrow] to return to the Switch 2000 TR  
>Unit screen and complete the remaining LCD config-  
uration tasks as described in this section or use the  
VT100 console as described in Chapter 4.  
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5-2  
CHAPTER 5: CONFIGURING WITH THE LCD CONSOLE  
Transparent Bridging  
Source Route  
Bridge Configuration  
Bridge settings can be made using the LCD console. If  
6 Press [Enter] to select appropriate bridge type.  
BRIDGE >Bridge Type appears.  
7 Press [Down Arrow].  
you have made settings using the VT100 interface,  
those settings will be reflected in the LCD console.  
Refer to Chapter 3 for more information on navigat-  
ing the LCD console.  
BRIDGE >Spanning Tree appears.  
8 Press [Enter].  
Although many of the steps in the following proce-  
dure are similar, be aware that the settings will vary  
depending on the bridging environment you choose.  
Refer to Chapter 1 for more information on the types  
of bridging supported by the Switch 2000 TR.  
Spanning Tree: <802.1d> appears.  
9 Press [Down Arrow] to select Spanning Tree type.  
Choices:  
NOTE: Some bridge settings (Spanning Tree) will not  
take effect until the Switch 2000 TR is reset. Refer to  
“Resetting the Switch 2000 TR in Chapter 3 for  
instructions on resetting the Switch 2000 TR.  
802.1d—IEEE 802.1d standard. This setting is typi-  
cally used for Transparent bridging or Source Route  
Transparent.  
IBM—IBM Spanning Tree standard. This setting is  
typically used in Source Routing environments.  
From the Switch 2000 TR LCD banner, proceed as fol-  
lows:  
Disabled—No Spanning Tree support.  
10 Press [Enter].  
1 Press [Enter].  
Switch 2000 TR >Unit Id appears.  
11 Press [Left Arrow] to return to the higher-level screens  
in the LCD console.  
2 Press [Down Arrow] until Switch 2000 TR >Bridge  
appears.  
3 Press [Enter].  
BRIDGE >Bridge Type appears.  
4 Press [Enter].  
Bridge Type:<SRT> appears.  
5 Press [Down Arrow] to select bridge type. Choose  
from:  
SRT (Source Route Transparent)  
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Port Configuration  
5-3  
Setting Port ID  
Port Configuration  
ceed as follows:  
Port parameters can also be set from the LCD console  
on the Switch 2000 TR front panel. If you have made  
settings using the VT100 interface, those settings will  
be reflected in the LCD console. Refer to Chapter 3  
for more information on navigating the LCD console  
and the LCD console map.  
1 Press [Enter].  
Switch 2000 TR >Unit appears.  
2 Press [Down Arrow] until Switch 2000 TR >Port  
appears.  
The screens are circular, meaning that you can access  
them by scrolling either up or down. For the sake of  
simplicity, these instructions use only the Down Arrow  
to move through the screens.  
3 Press Enter.  
Port >Port ID appears with the port number. Initially  
the port number shows Port 1.  
4 Press [Enter].  
You can set these parameters using the LCD console:  
5 Use the [Up or Down Arrow] to scroll the ports and  
Port ID  
select the port you wish to configure.  
Link State  
Port State  
Speed Mode  
Personality  
6 Press [Enter] to select the port.  
Port >Port ID appears, and the port number reflects  
the port number you chose in step 5.  
Viewing Link State  
more information.  
Link State reflects the current state of the port and  
cannot be changed. Refer to “Port Statistics in  
Chapter 6 for definitions of the states.  
From the Switch 2000 TR>Unit Id # LCD banner, pro-  
ceed as follows:  
Port ID  
Personality  
Speed  
Port State  
Link State  
Port ID  
Personality  
Speed  
ENTER  
Switch 2000 TR  
> Port  
ENTER  
1 Press [Enter].  
Port State  
Link State  
Link State  
Switch 2000 TR >Unit appears.  
2 Press [Down Arrow] until Switch 2000 TR >Port  
Figure 5-1 LCD Console Port Menu  
appears.  
3 Press Enter.  
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5-4  
CHAPTER 5: CONFIGURING WITH THE LCD CONSOLE  
4 Press [Down Arrow] until Port # >Link State appears.  
5 Press [Enter].  
The Port State identifies the current state of the port  
you are viewing.  
6 Press [Down Arrow] to select the state. Choices:  
Link State # >[state] appears.  
Enable  
Disable  
The Link State identifies the current state of the port  
you are viewing.  
Disabled  
7 Press [Enter] to confirm the state.  
Blocking  
If you select Disable, the LED for the corresponding  
port lights yellow to show the current state.  
Listening  
Learning  
Setting Speed  
Forwarding  
From the Switch 2000 TR>Unit Id # LCD banner, pro-  
ceed as follows:  
Broken  
This read-only field cannot be changed.  
6 Press [Left Arrow] to return to previous menu.  
1 Press [Enter].  
Switch 2000 TR >Unit appears.  
2 Press [Down Arrow] until Switch 2000 TR >Port  
Setting Port State  
From the Switch 2000 TR>Unit Id # LCD banner, pro-  
appears.  
ceed as follows:  
3 Press [Enter].  
1 Press [Enter].  
4 Press [Down Arrow] until Port # >Speed appears.  
5 Press [Enter].  
Switch 2000 TR >Unit appears.  
2 Press [Down Arrow] until Switch 2000 TR >Port  
Speed # [speed] appears.  
appears.  
Press [Down Arrow] to select speed. Choices:  
3 Press [Enter].  
16 MB  
4 MB  
4 Press [Down Arrow] until Port # >Port State appears.  
5 Press [Enter].  
6 Press [Enter] to confirm the speed setting.  
Port State # >[state] appears.  
7 Press [Left Arrow] to return to the previous menu.  
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I/O Module Configuration  
5-5  
personality of ports 5 through 12, you will be warned  
that your selection is invalid.  
Setting Port Personality  
Ports 1 through 4 can each be configured as either  
“Hub Port” or “Adapter Port.” The Adapter mode is  
the default for these ports. Ports 5 through 12 can  
only be set as “Adapter Port.” Refer to “SuperStack II  
Switch 2000 TR Front Panel RJ-45 Ports in Chapter 1  
for more information.  
7 Press [Enter] to confirm the personality on the port.  
I/O Module Configuration  
The console provides a quick method for viewing  
information regarding the FDDI, ATM, and TR-in-FE  
optional modules. Refer to Chapter 3 for more infor-  
mation on navigating the LCD console.  
From the Switch 2000 TR>Unit Id # LCD banner, pro-  
ceed as follows:  
1 Press [Enter].  
You can display the following using the LCD console:  
Switch 2000 TR >Unit appears.  
2 Press [Down Arrow] until Switch 2000 TR >Port  
Module Type  
appears.  
Module State  
3 Press [Enter].  
Hardware Version #  
Software Version #  
Boot Software Version #  
5 Press [Enter].  
6 Press [Down Arrow] to select the state. Choices on  
ports 1 through 4 only:  
To view I/O module status, proceed as follows from  
the top LCD menu, which displays the Switch 2000  
TR banner. See Figure 5-2.  
Adapter—Ports on the Switch 2000 TR are  
designed to act as adapters and therefore, attempt  
to join a ring according to Token Ring specifica-  
tions. In this mode the Switch 2000 TR must be  
connected to a Token Ring hub or MAU.  
Hub—The Switch 2000 TR can also act like a  
Token Ring hub port and provides a direct station  
attachment on ports 1 through 4. This feature is  
especially useful for direct attachment of servers.  
NOTE: Ports 5 through 12 are permanent Adapter  
ports and cannot be changed. If you try to change the  
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5-6  
CHAPTER 5: CONFIGURING WITH THE LCD CONSOLE  
For more information about setting up the modules  
refer to the documentation that came with them:  
Module Type  
Module State  
HW Version  
SW Version  
Boot SW Ver  
ENTER  
Switch 2000 TR  
> I/O Module  
ENTER  
SuperStack II Switch 2000 TR ATM OC-3 Module  
User Guide (Part Number #99041)  
L
SuperStack II Switch 2000 TR FDDI Module User  
Figure 5-2 I/O Module LCD Menus  
Guide (Part Number #99048)  
SuperStack II Switch 2000 TR TR-in-FE Module  
1 To view the next level, press [Enter].  
User Guide (Part Number #99045)  
2 Press the [Down Arrow] until Switch 2000 TR >  
Module appears.  
3 Press [Enter]. STATUS > Module Type appears.  
4 Press [Down Arrow] to scroll down through the I/O  
Module menus.  
5 Press [Enter] at any one of the following fields to view  
the information described below. Press [Down Arrow]  
to move through the circular menus.  
Module Type—One of three module types:  
FDDI  
ATM  
TR-in-FE  
Module State—The current status of the module  
(UP or DOWN).  
HW Version—The current version of the hardware  
PROM code.  
SW Version—The current version of the software  
code. (Not applicable for the TR-in-FE module.)  
Boot SW Version—The current Boot software  
version. (Not applicable for the TR-in-FE module.)  
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MONITORING THE SWITCH 2000 TR  
6
This chapter provides information on viewing the cur-  
rent operating status of the Switch 2000 TR, display-  
ing errors using the fault log, and carrying out a  
remote poll (PING).  
Locating Statistics  
See Figure 6-1 to locate specific status, statistics, and  
polling information. Refer to “LCD Status” for infor-  
mation on retrieving LCD statistics.  
Regularly viewing statistics allows you to be sure that  
your network and Switch 2000 TR devices are operat-  
ing properly. By viewing the performance and statisti-  
cal data recorded by the Switch 2000 TR, you will  
begin to see performance patterns develop which can  
be used to eliminate problems before they impair the  
operation of your network.  
Unit statistics, Port statistics, stack statistics, and Remote Poll  
This chapter includes information on the following  
fields:  
Locating Statistics  
Unit Statistics  
Port Statistics  
Stack Status  
Status  
TR status and access to Fault Log  
Fault Log  
Figure 6-1 Locating Statistic Information and Status  
Remote Polling (PING)  
LCD Status  
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6-2  
CHAPTER 6: MONITORING THE SWITCH 2000 TR  
The Unit Statistics screen displays these buttons:  
Unit Statistics  
RECEIVEDThe total number of frames that have  
been received by the port including frames with  
errors.  
NOTE:The Unit Statistics screen provides an easy  
method for viewing per-port performance. It displays  
port traffic activity for each active port. Values are  
refreshed approximately every two seconds. The  
counters are reset after the values reach approxi-  
mately 4.2 billion. See Figure 6-2.  
TRANSMITTEDThe total number of frames trans-  
mitted by the port, including frames with errors.  
FORWARDEDThe total number of frames received  
and then forwarded by the port.  
To view the Unit Statistics screen, take these steps  
from the Switch 2000 TR Main Menu:  
FILTEREDThe total number of frames filtered by  
this port. Frames are filtered because the destination  
station was on the same segment as the source sta-  
tion.  
1 Select Switch Management.  
The TR Management screen appears.  
2 Press [Space Bar] until Unit appears.  
3 Press [Down Arrow] until Statistics highlights.  
4 Press [Return].  
BROADCASTSThe total number of broadcast  
frames seen by the port.  
The Unit Statistics screen appears.  
5 Select statistic category and view.  
CLEAR SCREEN COUNTERSUse this button to set  
screen counters back to zero. This clears only counters  
displayed in the Unit Statistics screen. It does not  
affect the counters on the device. This prevents  
remote SNMP stations from seeing network anoma-  
lies.  
Figure 6-2 Unit Statistics Screen  
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Port Statistics  
6-3  
The TR Port Statistics screen displays this information:  
Port Statistics  
Unit IDThe number of the unit with which the port  
is associated.  
The TR Port Statistics screen provides an easy method  
for viewing individual port performance. See  
Figure 6-3. TR Port Statistics provide more detailed  
information on individual ports. This screen also pro-  
vides access to the Traffic Statistics screen.  
Port IDThe number of the port you are viewing.  
Link StateThe current state of the port you are  
viewing. The port states are:  
To view the TR Port Statistics screen, take these steps  
from the Switch 2000 TR Main Menu:  
Listening—The state in which all ports are placed  
while Spanning Tree configures the network topol-  
ogy. Ports remain in this state until the root bridge  
is selected. This period should be long enough for  
a port to hear from all other ports on the switch.  
1 Select Switch Management.  
The TR Management screen appears.  
2 Press [Space Bar] until Port appears.  
3 Press [Down Arrow] until Statistics highlights.  
4 Press [Return].  
Learning—The state in which ports receive data  
on the topology of the network for the purpose of  
learning the stations that are attached to the port.  
If the port receives no information that would  
force it into the blocking state, then it moves on to  
the forwarding state.  
The TR Port Statistics screen appears.  
Forwarding—This state allows the port to per-  
form standard switching and bridging functions.  
Packets are received and the port either forwards  
or discards them based on the address of the  
packet and the switchs address table.  
Blocking—In this state, the port continues to  
receive data on the status of the network topology  
but does not transmit them. The port also receives  
no packets nor learns the addresses of stations for  
forwarding or receiving.  
Figure 6-3 TR Port Statistics Screen  
Disabled—The state in which Spanning Tree has  
been turned off. Port is disabled by management.  
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6-4  
CHAPTER 6: MONITORING THE SWITCH 2000 TR  
Current UtilizationThe percentage of bandwidth  
usage for the port you are currently viewing. This  
value indicates the general traffic level on the individ-  
ual port. Ideally, this figure should be below 60%,  
which indicates that the port is responsible for a rea-  
sonable amount of traffic relative to the entire ring.  
ing. A typical TR Port Statistics (Traffic) screen appears  
in Figure 6-4.  
High utilization values suggest that you should adjust  
the network topology by reducing load on that port  
by segmentation.  
Frames ForwardedA running average of the pro-  
portion of the received frames that are forwarded.  
This value is expressed as a percentage of all received  
frames, based on a sampling interval of 20 seconds.  
Figure 6-4 Sample TR Port Statistics (Traffic) Screen  
Broadcast Frame BandwidthA running average  
of the broadcast frame bandwidth. This value is  
expressed as a percentage of theoretical maximum  
bandwidth availability, based on a sampling interval  
of 20 seconds.  
The TR Port Statistics (Traffic) screen displays this  
information:  
Unit IDThe identifying number of the unit you are  
viewing.  
Error FramesThis field displays a running average  
of the percentage of error frames with CRC errors  
and is based on a sampling interval of 20 seconds.  
Port IDThe identifying number of the port you are  
viewing.  
Frames ReceivedThe total number of frames that  
have been received by the port including frames with  
errors.  
Traffic StatisticsSelect this category to view the  
Port Statistics (Traffic) screen. See the next section.  
Port Statistics (Traffic)  
The TR Port Statistics (Traffic) screen provides a more  
Frames TransmittedThe total number of frames  
transmitted by the port, including frames with errors.  
detailed display of statistics for the port you are view-  
Multicasts ReceivedThe number of frames suc-  
cessfully received with a multicast destination  
address. This number does not include frames  
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Port Statistics  
6-5  
directed to a broadcast address or frames received  
with errors.  
Frame Size AnalysisA series of counters that rep-  
resent the composition of the traffic on the Switch  
2000 TR. The counters display the percentage of  
packets that are categorized by received length as  
represented by the following octet parameters:  
Broadcasts ReceivedThe number of frames  
received that have a broadcast destination address.  
This number does not include frames with errors.  
18 to 63 octets  
Octets ReceivedThe number of octets received by  
the port, including the MAC header and CRC. Octet  
counters are accurate to the nearest 256-byte bound-  
ary.  
64 to 127 octets  
128 to 255 octets  
256 to 511 octets  
Octets TransmittedThe number of octets trans-  
mitted by the port, including the MAC header and  
CRC. Octet counters are accurate to the nearest  
256-byte boundary.  
512 to 1023 octets  
1024 to 2047 octets  
2048 to 4095 octets  
Packets greater than 4095 octets  
Line ErrorsThe total number of CRC errors that  
have occurred on the port.  
Frames ForwardedThe total number of frames  
received by this port and then forwarded to their des-  
tination address.  
Cut-thrus ReceivedThe total number of cut-thru  
packets received on the port.  
ErrorsTotal of both line errors (CRCs) and lost  
frames.  
Lost FramesFrame transmitted by the Switch 2000  
TR which failed to make the return trip.  
Abort FramesFrames transmitted by the Switch  
2000 TR that need to be aborted by transmitting an  
abort delimiter.  
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6-6  
CHAPTER 6: MONITORING THE SWITCH 2000 TR  
StatusDisplays the unit number and the current  
status and position in the stack.  
Stack Status  
The Stack Status screen provides easy access to the  
SW VersionDisplays the current resident software  
version for each unit.  
vital statistics associated with a stack. Units and their  
status, the software version currently running on each  
unit and the MAC address of each unit displays.  
Mgmt MAC AddressDisplays the management  
MAC address for each unit. An asterisk (*) next to a  
MAC address indicates that the unit is the head unit.  
To view the Stack Status screen, perform these steps  
using the Switch 2000 TR Main Menu:  
1 Select Switch Management.  
The TR Management Screen appears.  
2 Press [Space Bar] until Stack appears.  
3 Press [Down Arrow] until Statistics highlights  
4 Press [Return].  
The Stack Status screen appears.  
Figure 6-5 TR Stack Status Screen  
The Stack Status screen displays this information:  
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Status  
6-7  
Number of ResetsThe total number of resets since  
the Switch 2000 TR was first installed or initialized, by  
manual power-up, manual reset, or watchdog time-  
out expiry.  
Status  
The Status screen provides read-only information  
about the Switch 2000 TR. Information provided on  
this screen is especially useful for troubleshooting and  
monitoring system history.  
Last Reset TypeThe type or cause of the most  
recent reset on the Switch 2000 TR. Resets may be  
caused by management command, watchdog time-  
out, power failure or interruption, a manual reset, or  
system error. If you experience a problem, give this  
information to your technical support representative.  
You can view some Status information using the LCD  
console on the front panel of the Switch 2000 TR.  
Refer to “LCD Status” for more information.  
To view the Status screen, perform these steps using  
the Switch 2000 TR Main Menu:  
Hardware VersionThe current hardware version  
of the Switch 2000 TR. Give this number when you  
request technical support.  
1 Select STATUS and press [Return].  
The Status screen appears, as shown in Figure 6-6.  
Upgradeable Software VersionThe version of  
the software image stored in Flash EPROM. This ver-  
sion is automatically updated when you download  
new software. Give this version when you request  
technical support.  
Boot Software VersionThe version number of the  
Boot software stored on the Switch 2000 TR. This  
number is useful when requesting technical support.  
FAULT LOGSelect this button to display the Switch  
2000 TR Fault Log. Refer to “Fault Log,” next.  
Figure 6-6 Status Screen  
The Status screen displays the following information:  
System Up TimeThe elapsed time in seconds since  
the Switch 2000 TR was last reset.  
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6-8  
CHAPTER 6: MONITORING THE SWITCH 2000 TR  
Time (seconds)The time elapsed between the last  
reset when the fault occurred.  
Fault Log  
The Fault Log displays read-only information about  
AreaInformation useful for fault diagnosis by tech-  
nical support.  
the Switch 2000 TR. The Fault Log updates whenever  
an abnormal condition occurs. This information is for  
internal 3Com use only. Your supplier may ask you to  
quote the Area and Fault Number if you report a  
problem.  
Fault NumberA hexadecimal number indicating  
the type of fault. Give this number to your technical  
support representative.  
To view the Fault Log, take these steps from the  
Switch 2000 TR Main Menu:  
1 Select STATUS and press [Return].  
The TR Status screen appears.  
2 Select FAULT LOG and press [Return].  
Figure 6-7 TR Fault Log Screen  
The TR Fault Log screen appears and the screen dis-  
plays the following:  
Reset CountThe number of resets recorded at the  
time of the fault.  
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Remote Polling (PING)  
6-9  
When the poll is complete, the Round Trip Time dis-  
plays the interval in milliseconds between sending the  
frame to the target device and receiving a response at  
the Switch 2000 TR. If the target device does not  
respond within approximately 10 seconds, the field  
displays no reply.  
Remote Polling (PING)  
The Remote Poll screen allows you to send a single  
frame to a remote device. Use this feature to verify if  
a remote device is active and responding. It can help  
locate network problems and is also referred to as  
PING.  
To use the Remote Poll feature, take these steps from  
the Switch 2000 TR Main Men:  
1 From the Switch 2000 TR Main Menu, select Remote  
Poll.  
The TR Remote Poll screen appears.  
Figure 6-8 TR Remote Poll Screen  
2 Enter the IP address of the device you want to poll in  
the Target Address field.  
Follow the address notation conventions as illustrated  
on the Remote Poll screen.  
3 Select Poll.  
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6-10  
CHAPTER 6: MONITORING THE SWITCH 2000 TR  
5 Press [Down Arrow].  
STATUS >SW Version> appears.  
6 Press [Enter].  
LCD Status  
The LCD console located on the front panel of the  
Switch 2000 TR provides useful hardware, software,  
and system version information. Refer to Chapter 5  
for more information.  
SW Version #> appears and displays the Boot software  
version stored on the Switch 2000 TR.  
7 Press [Left Arrow] to return to STATUS > SW Version>.  
8 Press [Down Arrow].  
HW Version #:  
[R/O Version]  
Switch 2000 TR  
> Status  
STATUS  
>HW Version >  
[Left Arrow]  
[Enter]  
[Enter]  
[Down Arrow]  
STATUS >BOOT SW Ver> appears.  
9 Press [Enter].  
SW Version #:  
[R/O Version]  
STATUS  
>HW Version >  
[Enter]  
[Left Arrow]  
[Down Arrow]  
Boot SW Ver #: displays the software version stored in the  
EPROM of the Switch 2000 TR. This version number is  
automatically updated when you download new software.  
Boot SW Ver #:  
[R/O Version]  
STATUS  
>Boot SW Ver >  
[Left Arrow]  
[Enter]  
Switch 2000 TR  
> Status  
10 Use [Left Arrow] to scroll back up through the menus.  
Figure 6-9 LCD Console Status Chart  
To view the LCD status, take these steps from the  
Switch 2000 TR>Unit Id banner:  
1 Press [Down Arrow] until Switch 2000 TR>Status>  
appears.  
2 Press [Enter].  
STATUS>HW Version appears.  
3 Press [Enter].  
HW Version#: appears and displays the hardware ver-  
sion of the Switch 2000 TR.  
4 Press [Left Arrow] to return to the STATUS >HW Ver-  
sion> display.  
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VIRTUAL LANS  
7
This chapter provides information on Virtual Local  
Area Networks (VLANs). Definitions, benefits, sample  
configurations and concepts of VLANs are described  
here, including:  
What are VLANs?  
A VLAN is defined as a group of location- and topol-  
ogy- independent devices that communicate as  
though they were on the same physical LAN. This  
means that LAN segments are not restricted by the  
hardware that physically connects them; the seg-  
ments are defined by flexible user groups that you  
create using software.  
What are VLANs?  
Benefits of VLANs  
VLANs and the Switch 2000 TR  
Setting up Virtual Local Area Networks (VLANs) on  
the Switch 2000 TR provides you with less time-con-  
suming network administration and more efficient  
network operation.  
With VLANs, you can define your network according  
to:  
Departmental Groups—For example, you can have  
one VLAN for the Marketing department, another  
for the Finance department, and another for the  
Development department.  
The following sections explain more about the con-  
cept of VLANs and explain how they can be imple-  
mented on the Switch 2000 TR.  
Hierarchical Groups—For example, you can have  
one VLAN for Directors, another for Managers,  
and another for general staff.  
Usage Groups—For example, you can have one  
VLAN for users of email, and another for users of  
multimedia.  
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7-2  
CHAPTER 7: VIRTUAL LANS  
How VLANs Provide Extra Security  
Benefits of VLANs  
Devices within each VLAN can only communicate  
with devices in the same VLAN. If a device in VLAN 1  
needs to communicate with devices in VLAN 2, the  
traffic must cross a router. Routers have filtering and  
security features to block unauthorized access.  
Implementing VLANs on your network has three main  
advantages:  
It eases the change and movement of devices on  
networks.  
Figure 7-1 shows a network configured with three  
VLANs—one for each of the departments that access  
the network. The membership of VLAN 1 is restricted  
VLAN 2 is restricted to ports 4, 5, 6, 7 and 8 of Switch  
B while VLAN 3 spans both Switches containing ports  
6, 7, 8 of Switch A and 1, 2, 3 of Switch B.  
It helps to control broadcast traffic.  
It provides extra security.  
How VLANs Ease Change and Movement  
With traditional IP networks, network administrators  
spend much of their time dealing with moves and  
changes. If users move to a different IP subnet, the IP  
addresses of each endstation must be updated manu-  
ally.  
In this simple example, each of these VLANs can be  
seen as a ’broadcast domain’—physical LAN seg-  
ments that are not constrained by their physical loca-  
tion.  
With a VLAN setup, if an endstation in VLAN 1 is  
moved to a port in another part of the network, you  
only need to specify that the new port is in VLAN 1,  
and this is something that can be done remotely if  
you have 3Coms Transcend Enterprise Manager for  
Windows (v6.0 and above).  
Specific configurations using the Switch are shown  
later in this chapter.  
How VLANs Control Broadcast Traffic  
With traditional networks, congestion can be caused  
by broadcast traffic that is directed to all network  
devices whether they require it or not. VLANs increase  
the efficiency of your network because each VLAN  
can be set up to contain only those devices that need  
to communicate with each other.  
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VLANs and the Switch 2000 TR  
7-3  
VLANs and the Switch 2000 TR  
Backbone Connecting Multiple Switches  
Switch B  
The Switch 2000 TR supports VLANs which consist of  
a set of switch ports. Each switch port can only  
belong to one VLAN at a time, regardless of the  
device to which it is attached.  
Switch A  
1
2
3
4
5
6
7
8
9
10 11 12  
1
2
3
4
5
6
7
8
9
10 11 12  
Each Switch 2000 TR can support up to 16 VLANs.  
However, you can have more than 16 VLANs in your  
entire network by connecting the 16 switched VLANs  
to other VLANs using a router.  
Development  
Department  
VLAN 3  
The Default VLAN and Moving Ports From the  
Default VLAN  
Marketing  
Department  
VLAN1  
Finance  
Department  
VLAN 3  
On each Switch, VLAN 1 is the default. It has two  
properties:  
Figure 7-1 The concept of VLANs  
It contains all the ports on a new or initialized  
Switch.  
It is the only VLAN which allows an SNMP Network  
Manager to access the management agent of the  
unit.  
By default, if a device is attached to a port in the  
Default VLAN and you want to move the device into  
another VLAN, you need to use the VLAN Setup  
screen to place the port in that VLAN.  
Connecting VLANs to a Router  
If the devices in a VLAN need to talk to devices in a  
different VLAN, each VLAN requires a connection to a  
router. Communication between VLANs can only take  
place if they are all connected to the router. A VLAN  
not connected to a router is isolated.  
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7-4  
CHAPTER 7: VIRTUAL LANS  
within one VLAN will not be able to communicate  
with devices in a different VLAN.  
Connecting Common VLANs Between Switch Units  
In the Switch 2000 TR, you typically connect VLANs to  
other Switch 2000 TRs and units using backbone  
ports. This allows the Switch to forward all frames  
with an unknown address to the rest of the network,  
and it also stops the Switch Database from becoming  
full if there are more than 500 addresses in the net-  
work. Note that you normally require one backbone  
port per VLAN.  
Using Unique MAC Addresses  
If you connect a server with multiple network adapt-  
ers to the Switch, we recommend that you configure  
each network adapter with a unique MAC address.  
Extending VLANs into an ATM Network  
If the Switch has an ATM OC-3c Module installed, you  
can extend the VLANs you have defined in your exist-  
ing network into an ATM network. For more informa-  
tion, see the SuperStack II Switch ATM OC-3c  
Module User Guide.  
In addition, to make the Switch-to-Switch connec-  
tions more cost-effective, the Switch 2000 TR allows  
you to specify that one port forms part of a Virtual  
LAN Trunk (VLT). A VLT is a connection that carries  
traffic for multiple VLANs between Switch units. If  
you configure both ends of a Switch-to-Switch con-  
nection as part of a VLT, you only need that one con-  
nection for all the VLANs.  
Example 1  
The example shown in Figure 7-2 illustrates a simple  
VLAN configuration with a single Switch 2000 TR  
whose ports are divided between two VLANs. VLAN 1  
is able to talk to VLAN 2 using the connection  
between each VLAN and the router.  
NOTE: VLTs can only be used for links between  
SuperStack II Switch 2000 TR units. You cannot use  
VLTs for Switch-router links.  
To set up this configuration:  
If you specify that a backbone port on one VLAN is  
part of a VLT, that backbone port becomes a back-  
bone port for all the VLANs on the Switch, even if  
they had no backbone port before. If you subse-  
quently disable the VLT function on that port, the port  
becomes the backbone port for the Default VLAN  
(VLAN 1) and all other VLANs lose their backbone  
ports.  
1 Use the VT100 screens or VLAN Server database to:  
a Place ports 1-6 in VLAN 1.  
b Place ports 7-12 in VLAN 2.  
2 Connect a port in VLAN 1 to the router.  
3 Repeat steps 2 and 3 for VLAN 2.  
Using Non-routable Protocols  
If you are running non-routable protocols on your  
network (for example, DEC LAT or NETBIOS), devices  
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VLANs and the Switch 2000 TR  
7-5  
Switch 2000  
TR  
VLAN 1  
VLAN 2  
Connection  
for VLAN 2  
Connection  
for VLAN 1  
Figure 7-2 VLAN configuration with a single Switch 2000 TR unit  
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7-6  
CHAPTER 7: VIRTUAL LANS  
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SOFTWARE UPGRADE UTILITY  
A
The SuperStack II Switch 2000 TR has a back-up  
Software Upgrade Utility that allows you to:  
Software Upgrade Utility Command Set  
At the > prompt you can enter commands followed  
by a [Return]. The commands are not case-sensitive.  
Download a new software image if the opera-  
tional image has been damaged. This feature  
should be used for emergency situations only!  
A (ip-address)  
Download a new software image for new revi-  
Sets the IP address of the Switch 2000 TR. Enter the IP  
sions.  
address in dotted decimal format. For Example: 192.192.1.1  
B
The Software Upgrade Utility is also available  
through the Switch 2000 TR Main Menu under  
SOFTWARE UPGRADE. It is easier to access this util-  
ity through the Main menu, when it is available.  
Refer to "Upgrading Software" in Chapter 3 for  
more instructions.  
Starts the download.  
B (address)  
Starts the download and loads the software from the  
server with the IP address entered.  
D (ip-address)  
This appendix provides information on configuring  
the Software Upgrade Utility:  
Sets the IP address of the default router. You must set this  
parameter if the software image is kept on a server  
beyond a router.  
Software Upgrade Command Utility  
Set—Keyboard commands for using the Software  
Upgrade Utility.  
F (filename)  
Specifies the filename of the software image file.  
You must enter this value for a successful download.  
“UNIT# (1 through 8) is reserved for downloading  
from another unit in stack.  
Using the Software Upgrade UtilityProce-  
dures for configuring parameters. Downloads are  
initiated in-band or from another unit in stack  
using the high-speed cascade connection.  
G
Re-starts the Switch 2000 TR without downloading a new  
software image. Use this command after using the com-  
mand R.  
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A-2  
APPENDIX A: SOFTWARE UPGRADE UTILITY  
L
Starting the Software Upgrade Utility  
Lists the current settings of the Switch 2000 TR and pro-  
vides a status report for the previous download attempts.  
Use this command to check that you have entered all the  
parameters necessary for a successful download.  
1 Connect a terminal to the serial port on the rear  
panel of the Switch 2000 TR. Refer to "Console  
Port" in Chapter 1.  
Figure A-1 represents the screen after using the com-  
mand.  
2 Quickly (within 3 seconds) press the reset button on  
the rear panel twice. Refer to "Reset Button" in  
Chapter 1.  
M (subnet mask)  
Enter the subnet mask in dotted decimal format.  
All LEDs on the front panel light and the Software  
Upgrade Utility appears on the console. See Figure  
A-1.  
For Example: 255.255.0.0  
R
Resets the Switch 2000 TR to the factory default values for  
the main software. Use the G command after using this  
command.  
WARNING: Resetting the Switch 2000 TR erases all  
configuration parameters, including IP addressing  
information.  
P
Allows you to set the personality (A for adapter, H for hub  
on ports 1 through 4 only) and speed (4 or 16).  
Figure A-1 Software Upgrade Utility Screen  
For example: P 2 A for port 2 set to adapter or  
P 11 16 for port 11 set for 16 Mbps  
S (address)  
Sets the IP address of the server that holds the new soft-  
ware image file. This command does not start the down-  
load. Use the B command to start the download.  
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Using the Commands  
A-3  
The utility displays a series of dots on the screen as  
the download proceeds. After approximately two  
minutes, this message appears:  
Using the Commands  
The following sections tell you how to use the Soft-  
Software Upgrade Complete  
ware Upgrade Utility screen.  
3 Reset the device. Refer to "After the Download"”  
If you enter the Software Upgrade Utility acciden-  
tally, enter the command G to quit. If you give no  
keyboard input for 30 seconds, the utility will time  
out.  
and "Resetting the Switch 2000 TR" in Chapter 3.  
Refer to "Status Messages" for more information.  
After the Download  
Resetting to Factory Defaults  
When you have successfully downloaded the new  
software image, the Switch 2000 TR resets  
automatically. After a successful download the  
Switch 2000 TR retains the following configuration  
data:  
Enter command R and then command G if you do  
not want to download a new software image.  
Downloading a New Software Image  
1 Change the following parameters:  
IP address of the Switch 2000 TR to which you  
will be downloading the new software image  
(enter A).  
address)  
Unit and port setup  
Subnet mask (enter M).  
SNMP interface data (for example, the commu-  
nity string)  
Default router (enter D). This needs to be set only  
if the software image file is on a server that  
needs to be accessed over a gateway or router.  
and passwords)  
IP address of the server (enter S).  
This saved data allows you to manage immediately after  
the download.The following configuration values are reset  
to the factory defaults:  
2 When you have made any necessary parameter  
changes, Press command B.  
Alarm Table  
Fault Log  
The following message appears:  
Starting Software Upgrade  
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A-4  
APPENDIX A: SOFTWARE UPGRADE UTILITY  
11—Invalid record type.  
12—Checksum error.  
Status Messages  
The Software Upgrade utility reports the status of  
the last download attempt. It reports error messages  
if the download was unsuccessful.  
Message 13 and 14 indicate that you are trying to  
load the wrong type of software image file.  
The status messages are described below:  
13—File is for the wrong device type.  
Messages 1 through 7 are standard TFTP errors as  
detailed in IFC 783. These errors generally indicate that  
you do not have access privileges to access the soft-  
ware image. Check with your system administrator.  
14—File is for the wrong hardware version.  
Messages 15 through 17 indicate that the file is cor-  
rupted. It may have been corrupted during transmis-  
sion. Attempt the download again.  
1—File not found. Check that you have entered the  
correct file name.  
15—File header record is missing from file.  
16—Byte count error.  
2—Access Violation.  
4—Illegal Operation.  
5—Unknown transfer identifier.  
7—No such user.  
17—Load address in file was outside memory.  
Messages 18 and 19 indicate a hardware failure on  
the Switch 2000 TR. Consult your supplier for fur-  
ther advice.  
8—No response from the load server. Check that  
you have entered the correct address for the  
server where the software image file is stored  
and that server is switched on.  
18—Failed to erase Flash EPROM.  
19—Flash EPROM programming failed.  
Messages 20 through 22 show that system load is  
underway or has successfully completed.  
Messages 9 through 12 indicate that the file is cor-  
rupted. It may have been corrupted during transmis-  
sion. Attempt the download again.  
20—System load pending.  
21—System load active.  
22—System load successful.  
9—No resources.  
10—Record length mismatch.  
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SCREEN ACCESS RIGHTS  
B
The table in this appendix specifies which level of  
users can view and usually edit (write). Access  
rights allow users to view and/or edit the Switch  
2000 TR VT100 management screens.  
Screen  
Accessible to . . .  
Port Statistics (Error)  
Monitor  
Manager  
Security  
Unit Traffic  
Monitor  
Manager  
Security  
All access rights are read-and-write except where  
noted as read-only.  
Switch Database View  
Unit Setup  
Monitor  
Manager  
Security  
Access Rights Table  
Monitor read-only  
Manager  
Security  
Screen  
Accessible to . . .  
Port Setup  
Monitor read-only  
Manager  
Security  
Logon  
Monitor  
Manager  
Security  
Remote Poll  
Manager  
Security  
Main Menu  
Monitor  
Manager  
Security  
Security Menu  
Monitor  
Manager  
Security  
Switch 2000 TR Management  
Port Statistics  
Monitor  
Manager  
Security  
Create User  
Delete User  
Local Security  
Change User  
Security  
Security  
Security  
Monitor  
Manager  
Security  
Monitor  
Manager  
Security  
Port Statistics (Traffic)  
Monitor  
Manager  
Security  
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B-2  
APPENDIX B: SCREEN ACCESS RIGHTS  
Screen  
Accessible to . . .  
Status  
Monitor  
Manager  
Security  
Fault Log  
Monitor  
Manager  
Security  
Setup  
Monitor read-only  
Manager  
Security  
Serial Port Setup  
Trap Setup  
Monitor read-only  
Manager  
Security  
Monitor read-only  
Manager  
Security  
Software Upgrade  
Initialize  
Security  
Security  
Reset  
Manager  
Security  
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SERIAL PORT CABLE PIN-OUTS  
C
SuperStack II Switch 2000 TR ATM OC-3 Module  
Null Modem Cable  
User Guide (Part Number #99041)  
SuperStack II Switch 2000 TR FDDI Module User  
9 pin to RS-232 25 pin. Pin numbers that are under-  
lined are different. All other pin designations are  
straight through.  
Guide (Part Number #99048)  
SuperStack II Switch 2000 TR TR-in-FE Module  
User Guide (Part Number #99045)  
Table 0-1 Null Modem Serial Cable Pin Outs  
DB9 Female  
DB9 Female  
1
2
3
4
5
6
7
8
9
1
3
2
4
5
6
7
8
9
Cabling for Module Options  
If you have an ATM, FDDI, or TR-in-FE module, see  
the following manuals for special cabling specifica-  
tions:  
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C-2  
APPENDIX C: SERIAL PORT CABLE PIN-OUTS  
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TROUBLESHOOTING  
D
The SNMP manager cannot access the device:  
Troubleshooting Procedures  
Check that the device's IP address, subnet mask,  
and default router are correctly configured, and  
that the device has been reset. Check that the  
device's IP address is correctly recorded by the SNMP  
manager.  
This appendix lists potential problems you might  
see when managing the Switch 2000 TR and  
includes suggested actions to take. If you experience  
a problem not listed here or that you cannot solve,  
please contact your local technical support represen-  
tative.  
Refer to "Setting Up the VT100 Console" in  
Chapter 3.  
The initial Main Banner screen does not dis-  
play:  
The Telnet workstation cannot access the  
device:  
Check that your terminal or terminal emulator is  
correctly configured to operate as a VT100 terminal.  
Check that the device's IP address, subnet mask and  
default router are correctly configured, and that the  
device has been reset.  
For serial port access, try pressing [Return] several  
times before the Main Banner appears.  
Check the settings on your terminal or emulator.  
Be sure that you enter the IP address correctly  
when invoking the Telnet facility.  
Refer to "Setting Up the VT100 Console" in  
Chapter 3.  
Refer to "Setting Up the VT100 Console" in  
Chapter 3.  
Screens are incorrectly displayed:  
Check that your terminal or terminal emulator is  
correctly configured to operate as a VT100 terminal.  
Traps are not received by the SNMP manager:  
Check that the SNMP manager's IP address and the  
community string are correctly configured.  
Check the settings on your terminal or emulator.  
Refer to "Setting Up the VT100 Console" in  
Chapter 3.  
Refer to "Setting Up the VT100 Console" in  
Chapter 3.  
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D-2  
APPENDIX D: TROUBLESHOOTING  
The SNMP manager or Telnet workstation can  
no longer access the device:  
If Power LED is Yellow. . .  
Unit failed self-test. Return to supplier.  
If port fails to join ring . . .  
Check that Remote Telnet access or Commu-  
nity-SNMP access is enabled.  
Check ring speed and cable. Check personality of  
port.  
Check that the port through which you are access-  
ing the device has not been disabled, see "Port  
Configuration" in Chapter 4. If it is enabled, check  
the connections and network cabling at the port.  
If server fails to attach to ports 1 through 4. . .  
Check personality and cable connection.  
Try accessing the device through a different port. If  
you can now access the device, a problem with the  
original port is indicated. Re-examine the connec-  
tions and cabling.  
If Source Route traffic is not forwarded...  
Check Bridge Type, Ring Number initialized and  
matches other bridges on ring. Make sure  
ring/bridge/ring numbers are unique.  
A network problem can prevent you from accessing  
the device over the network. Try accessing the  
device through the serial port. Refer to "Setting Up  
the VT100 Console" in Chapter 3.  
Broadcast storms. . .  
Check to see if Spanning Tree is enabled. If yes,  
make sure the type and address match the rest of  
the network.  
You forget your password and cannot log in:  
If you are not one of the default users (monitor,  
manager or security), another user having security  
access level can log in, delete your user name, and  
create a new user name for you, with a new pass-  
word.  
If Transparent traffic not forwarded. . .  
Check Bridge Type and verify if it is Source Route  
Transparent or Transparent.  
Another user having ‘security' access level can log in  
and initialize the device. This action returns all con-  
figuration information, including passwords, to the  
factory default values.  
If no one user knows a password for a security  
level user, contact your supplier.  
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SWITCH 2000 TR  
TECHNICAL SPECIFICATIONS  
E
Physical Dimensions  
Height: 2.75 inches (7.0 cm) x Width: 17.25 inches (44cm) x Depth 12 inches (30.5 cm)  
Weight: 4.4kg (9.7lbs)  
Environmental Requirements  
Operating Temperature  
Operating Humidity  
Safety  
32˚ to 120˚F (0˚ to 50˚ C)  
10 to 95% relative humidity, non-condensing  
Agency Certifications  
AC Protection  
UL 1950, EN60950 (TUV), CSA 22.2 No. 950  
5A Time Delay Fuse  
Electromagnetic Emissions  
(Agency Certification)  
EN55022 Class A, FCC Part 15 Class A  
EN50082-1 (IEC801 Parts 2-5)  
Heat Dissipation  
Power Supply  
100 watts maximum (341 BTU/hour maximum)  
AC Line Frequency  
Input Voltage Options  
Current Rating  
50/60 Hz  
100-120/200-240 VAC  
100 VAC at 3 amps (maximum)/200 VAC at 2 amps (maximum)  
Standards Supported  
SNMP  
Terminal Emulation  
telnet (RFC 854)  
Protocols Used for Administration  
UDP (RFC 768)  
SNMP protocol (RFC 1157)  
MIB-II (RFC 1213)  
Bridge MIB (RFC 1493)  
Source Route Bridge MIB (RFC 1525)  
RMON MIB (RFC 1271)  
Token Ring Extension to RMON MIB (RFC 1513)  
BootP (RFC 951)  
IP (RFC 791)  
ICMP (RFC 792)  
TCP (RFC 793)  
ARP (RFC 826)  
TFTP (RFC 783)  
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E-2  
APPENDIX E: SWITCH 2000 TR TECHNICAL SPECIFICATIONS  
Specifications for Module Options  
If you have an ATM, FDDI, or TR-in-FE module, see  
the following manuals for technical specifications:  
SuperStack II Switch 2000 TR ATM OC-3 Module  
User Guide (Part Number #99041)  
SuperStack II Switch 2000 TR FDDI Module User  
Guide (Part Number #99048)  
SuperStack II Switch 2000 TR TR-in-FE Module  
User Guide (Part Number #99045)  
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TECHNICAL SUPPORT  
F
3Com provides easy access to technical support infor-  
mation through a variety of services. This appendix  
describes these services.  
and support, news about the company,  
Net Age® Magazine, and more.  
3Com Bulletin Board Service  
Information contained in this appendix is correct at  
time of publication. For the very latest, we recom-  
mend that you access 3Com Corporations World  
Wide Web site.  
3ComBBS contains patches, software, and drivers for  
all 3Com products, as well as technical articles. This  
service is available through analog modem or digital  
modem (ISDN) 24 hours a day, 7 days a week.  
Access by Analog Modem  
Online Technical Services  
To reach the service by modem, set your modem to  
8 data bits, no parity, and 1 stop bit. Call the  
telephone number nearest you:  
3Com offers worldwide product support 24 hours a  
day, 7 days a week, through the following online  
systems:  
World Wide Web site  
Country  
Australia  
Brazil  
Data Rate  
Telephone Number  
61 2 9955 2073  
55 11 547 9666  
33 1 6986 6954  
4989 62732 188  
852 2537 5608  
39 2 27300680  
81 3 3345 7266  
52 5 520 7853  
86 10 684 92351  
65 534 5693  
up to 14400 bps  
up to 14400 bps  
up to 14400 bps  
up to 28800 bps  
up to 14400 bps  
up to 14400 bps  
up to 14400 bps  
up to 28800 bps  
up to 14400 bps  
up to 14400 bps  
3Com Bulletin Board Service (3ComBBS)  
3ComFactsSM automated fax service  
3ComForum on CompuServe online service  
France  
Germany  
Hong Kong  
Italy (fee required)  
Japan  
World Wide Web Site  
Access the latest networking information on 3Com  
Corporations World Wide Web site by entering our  
URL into your Internet browser:  
Mexico  
P.R. of China  
Singapore  
(continued)  
http://www.3com.com/  
This service features the latest information about  
3Com solutions and technologies, customer service  
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F-2  
APPENDIX F: TECHNICAL SUPPORT  
Local access numbers are available within the follow-  
ing countries:  
Country  
Data Rate  
Telephone Number  
886 2 377 5840  
44 1442 438278  
1 408 980 8204  
Taiwan, R.O.C.  
U.K.  
up to 14400 bps  
up to 28800 bps  
up to 28800 bps  
Country  
Australia  
Belgium  
Telephone Number  
1800 678 515  
0800 71279  
800 17319  
U.S.A.  
Access by Digital Modem  
Denmark  
Finland  
ISDN users can dial in to 3ComBBS using a digital  
modem for fast access up to 56 Kbps. To access  
3ComBBS using ISDN, use one of the following  
numbers:  
98 001 4444  
05 90 81 58  
0130 81 80 63  
800 933 486  
1678 99085  
1800 801 777  
06 0228049  
0800 446 398  
800 11062  
France  
Germany  
Hong Kong  
Italy  
408 654 2706 or 408 654 2703  
Malaysia  
Netherlands  
New Zealand  
Norway  
3ComFacts Automated Fax Service  
3Com Corporations interactive fax service,  
3ComFacts, provides data sheets, technical articles,  
diagrams, and troubleshooting instructions on 3Com  
products 24 hours a day, 7 days a week.  
Portugal  
Russia (Moscow only)  
Singapore  
Spain  
0505 442 607  
956 0815  
Call 3ComFacts using your Touch-Tone telephone  
using one of these international access numbers:  
800 6161 463  
900 964 445  
020 792954  
0800 626403  
Country  
U.K.  
Telephone Number  
44 1442 438279  
1 408 727 7021  
Sweden  
U.K.  
U.S.A.  
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Support from Your Network Supplier  
F-3  
3ComForum on CompuServe Online Service  
Support from 3Com  
3ComForum contains patches, software, drivers, and  
technical articles about all 3Com products, as well as  
a messaging section for peer support. To use  
If you are unable to receive support from your  
network supplier, technical support contracts are  
available from 3Com.  
3ComForum, you need a CompuServe account.  
Contact your local 3Com sales office to find your  
authorized service provider using one of these  
numbers:  
To use 3ComForum:  
1 Log on to your CompuServe account.  
2 Type go threecom  
Regional Sales Office  
Telephone Number  
3 Press [Return] to see the 3ComForum main menu.  
3Com Corporation  
P.O. Box 58145  
5400 Bayfront Plaza  
Santa Clara, California  
95052-8145  
800 NET 3Com or 1 408 764 5000  
408 764 5001 (fax)  
Support from Your Network Supplier  
If additional assistance is required, contact your  
network supplier. Many suppliers are authorized  
3Com service partners who are qualified to provide a  
variety of services, including network planning, instal-  
lation, hardware maintenance, application training,  
and support services.  
U.S.A.  
3Com Asia Limited  
Australia  
61 2 9937 5000 (Sydney)  
61 3 9866 8022 (Melbourne)  
852 2501 1111  
91 11 644 3974  
62 21 572 2088  
81 6 536 3303 (Osaka)  
81 3 3345 7251 (Tokyo)  
82 2 319 4711  
Hong Kong  
India  
Indonesia  
Japan  
When you contact your network supplier for assis-  
tance, have the following information ready:  
Korea  
Malaysia  
60 3 732 7910  
64 9 366 9138  
632 892 4476  
8610 68492568 (Beijing)  
86 21 63501581 (Shanghai)  
65 538 9368  
886 2 377 5850  
662 231 8151 5  
A list of system hardware and software, including  
New Zealand  
Philippines  
P.R. of China  
revision levels  
Diagnostic error messages  
Singapore  
Taiwan, R.O.C.  
Thailand  
Details about recent configuration changes, if  
applicable  
3Com Benelux B.V.  
Belgium  
Netherlands  
If you are unable to contact your network supplier,  
see the following section on how to contact 3Com.  
32 2 725 0202  
31 30 6029700  
(continued)  
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F-4  
APPENDIX F: TECHNICAL SUPPORT  
Regional Sales Office  
Telephone Number  
Regional Sales Office  
Telephone Number  
3Com Canada  
Calgary  
Edmonton  
Montreal  
Ottawa  
Toronto  
Vancouver  
3Com Nordic AB  
Denmark  
Finland  
Norway  
Sweden  
403 265 3266  
403 423 3266  
514 683 3266  
1 613 566 7055  
416 498 3266  
604 434 3266  
45 39 27 85 00  
358 0 435 420 67  
47 22 58 47 00  
46 8 632 56 00  
3Com Russia  
007 095 258 09 40  
27 11 807 4397  
3Com Southern Africa  
3Com UK Ltd.  
3Com France  
33 1 69 86 68 00  
44 131 240 2900 (Edinburgh)  
44 161 873 7717 (Manchester)  
44 162 889 7000 (Marlow)  
3Com GmbH  
Austria  
Czech Republic/Slovak Republic 420 2 21845 800  
43 1 513 4323  
Germany  
(Central European HQ)  
Hungary  
49 30 34 98790 (Berlin)  
49 89 627320 (Munich)  
36 1 250 83 41  
Returning Products for Repair  
Poland  
Switzerland  
48 22 6451351  
41 31 996 14 14  
Before you send a product directly to 3Com for repair,  
you must first obtain a Return Materials Authorization  
(RMA) number. Products sent to 3Com without RMA  
numbers will be returned to the sender unopened, at  
the senders expense.  
3Com Iberia  
Portugal  
Spain  
351 1 3404501  
34 1 383 17 00  
3Com Ireland  
353 1 820 7077  
3Com Latin America  
U.S. Headquarters  
Northern Latin America  
Argentina  
Brazil  
Chile  
Colombia  
Mexico  
Peru  
Venezuela  
To obtain an RMA number, call or fax:  
408 326 2093  
305 261 3266 (Miami, Florida)  
541 312 3266  
55 11 5181 0869  
562 633 8935  
571 629 4110  
52 5 520 7841/7847  
51 1 221 5399  
58 2 953 8122  
Country  
Telephone Number  
Fax Number  
U.S.A. and Canada  
1 800 876 3266,  
option 2  
408 764 7120  
Latin America  
1 408 326 2927  
44 1442 438125  
408 764 7120  
Europe, South Africa,  
and Middle East  
44 1442 435822  
3Com Mediterraneo  
Italy  
39 2 253011 (Milan)  
39 6 5279941 (Rome)  
Elsewhere  
1 408 326 2926  
1 408 764 7120  
3Com Middle East  
971 4 349049  
08/04/97  
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1
bulletin board service F-1  
INDEX  
E
Editing Users, access database 4-18  
Error Frames, description of 6-4  
C
Numbers  
Cascade Connections, stack configuration 3-3  
cautions in text  
3Com Bulletin Board Service (3ComBBS) F-1  
3Com sales offices F-3  
F
defined  
2
Factory Defaults, resetting A-3  
Fault Log 6-8  
CompuServe F-3  
Configuration Guidelines  
topology rules 2-3  
3ComFacts F-2  
3ComForum F-3  
Area 6-8  
Fault Number 6-8  
Time (seconds) 6-8  
fax service. See 3ComFacts  
Forward Delay, Spanning Tree 4-5  
Forwarding Modes  
Dynamic Cut-thru 1-17  
Store-and-Forward 1-17  
Forwarding, description of 6-3  
Frames Forwarded, description of 6-4  
Front Panel  
components 1-6  
Front Panel LEDs  
description of 1-7  
Fuse, replacing 2-3  
conventions in text  
A
defined  
1
Administrative Settings  
CREATE NEW USER 4-15  
DELETE USERS 4-15  
EDIT USER 4-16  
Current Utilization, description of 6-4  
Cut-thru, setting 4-8  
LOCAL SECURITY 4-15  
ATM networks  
extending VLANs into 7-4  
Auto 3-18  
D
Database 4-19  
adding entries 4-21  
creating new users 4-17  
deleting users 4-17  
editing users 4-18  
entry methods 4-19  
finding entries 4-21  
Default Users, management console 3-8  
Default VLAN 4-13, 7-3  
Auto Logout, description of 3-18  
B
backbone port 4-12, 7-4  
specifying 4-13  
H
BootP Client 4-12  
BOOTP, setting up 3-16  
Bridge Configuration  
High-speed Cascade Connectors  
description of 1-14  
Device Defaults  
description of 2-6  
Device Defaults, description of  
Bridge 2-7  
Port 2-6  
Stack 2-7  
Unit 2-6  
Workgroup 2-7  
dimensions E-1  
Disabled, description of 6-3  
Dynamic Cut-thru  
setting  
High-speed Cascade Interface  
description of 1-2  
High-speed Migration, illustration of 1-6  
Source Routing Transparent (VT100) 4-3  
Bridge Configuration (LCD Console)  
Bridge Configuration 5-2  
Port Configuration 5-3  
Unit Configuration 5-1  
Bridge Configuration (VT100) 4-3  
Source Route 4-4  
Source Routing Bridging 4-4  
Transparent Bridging 4-4  
Bridge Hello Time, Spanning Tree 4-5  
Bridge Max Age, Spanning Tree 4-5  
Broadcast Frame Bandwidth, description  
of 6-4  
I
Increased bandwidth, benefits of 1-1  
IP Addresses  
Managing Over The Network 3-4  
Operating IP in a Closed Network 3-4  
Setup 3-15  
definition of 4-8  
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2
notice conventions  
1
Disabled 6-3  
Forwarding 6-3  
Learning 6-3  
Listening 6-3  
L
LCD Console 3-15  
LCD Display Buttons  
description of 1-7  
Learning, description of 6-3  
Link State  
O
online technical services F-1  
Port ID 6-3  
Unit ID 6-3  
Port Statistics (Traffic) 6-4  
Abort Frames 6-5  
Broadcasts Received 6-5  
Cut-thrus Received 6-5  
Errors 6-5  
Frame Size Analysis 6-5  
Frames Forwarded 6-5  
Frames Received 6-4  
Frames Transmitted 6-4  
Line Errors 6-5  
P
viewing  
PING  
LCD Console 5-3  
Listening, definition of 6-3  
Local Security  
Remote Poll 6-9  
Port 2-6  
port  
backbone 4-12, 4-13  
Port Bridge Fields 4-10  
Attached LAN ID 4-10  
Max Route-Desc 4-10  
Path Cost 4-10  
Priority 4-10  
STE Mode 4-10  
Community SNMP 4-16  
Manager 4-16  
Monitor 4-16  
Remote Telnet 4-16  
Secure Monitor 4-16  
Security 4-16  
Serial Port 4-16  
Setting 4-16  
Specialist 4-16  
Lost Frames 6-5  
Multicasts Received 6-4  
Octets Received 6-5  
Octets Transmitted 6-5  
Port ID 6-4  
Port Statistics, viewing 6-3  
Power Socket, description of 1-9  
Power Supply and Fuse, description of 2-3  
Port Configuration  
Broadcast Storm Control  
Falling Action 4-9  
Falling Threshold% 4-9  
Rising Action 4-9  
Cut-thru Mode (VT100) 4-8  
Forwarding Mode (VT100) 4-8  
Port Admin. State (VT100) 4-6  
Port Priorities (VT100), Internal Priority 4-7  
Ports(VT100) 4-6  
Port Parameters  
Port ID (LCD) 5-3  
Port Personality (LCD) 5-5  
Port State (LCD) 5-4  
Speed Mode (LCD) 5-4  
Port Personality, setting  
LCD Console 5-5  
Locally Admin Address, management set  
up 3-11  
M
Management Prerequisites, initial set up 3-5  
Locally Admin. Address 3-11  
Managing Over The Network 3-4  
Spanning Tree 4-5  
R
Rack Mounting, instructions 2-5  
Rear Panel, description of components 1-8  
Redundant Power System  
connecting 2-6  
N
Network management, application of 1-2  
Network segmentation, benefits of 1-1  
network supplier support F-3  
New Users  
description of 1-9  
related publications  
2
release notes  
Remote Poll  
PING 6-9  
1
Access Level 4-17  
Community String 4-17  
Password 4-17  
Port Statistics 6-3  
Broadcast Frame Bandwidth 6-4  
Current Utilization 6-4  
Error Frames 6-4  
Frames Forwarded 6-4  
Link State 6-3  
Reset Button, description of 1-9  
Resetting the Switch 2000 TR  
LCD Reset 3-21  
Power Cycle Reset 3-22  
Reset Button 3-22  
User Name 4-17  
New Users, creating 4-17  
notes in text  
defined  
2
Blocking 6-3  
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3
Reset Button Reset 3-22  
VT100 Reset 3-21  
returning products for repair F-4  
RJ-45 Ports, description of 1-6  
Roving Analysis, description of 1-3  
Forward Delay 4-5  
IBM Spanning Tree 1-16  
Priority 4-5  
T
Technical Specifications E-1  
technical support  
3Com URL F-1  
bulletin board service F-1  
CompuServe service F-3  
network suppliers F-3  
product repair F-4  
Spanning Tree, description of 1-16  
Stack Configuration 4-11  
Setting sysName 4-12  
setting Up the Stack 4-11  
cascade connections 3-3  
Stack Mounting, instructions 2-5  
standards supported E-1  
Status  
S
Safety Information 2-1  
Screen Access Rights B-1  
screens  
VLAN Setup 4-12  
Serial Port  
connecting to 2-6  
setting  
Token Ring Switching Concepts 1-14  
Source Route Bridging 1-14  
Source Route Transparent Bridging 1-16  
Transparent Bridging 1-15  
Boot Software Version 6-7  
FAULT LOG 6-7  
Traffic Statistics, description of 6-4  
Troubleshooting D-1  
Hardware Version 6-7  
Last Reset Type 6-7  
Number of Resets 6-7  
System up time 6-7  
Upgradeable Software Version 6-7  
Status Messages, software download A-4  
Status, device 6-7  
Auto Config 4-23  
Char Size 4-23  
Connection Type 4-23  
DCD Control 4-23  
DSR Control 4-23  
Flow Control 4-23  
Parity 4-23  
U
Unit Configuration  
Option Slot 4-14  
Port Capacity 4-14  
Power Supply 4-14  
Setting Up the Unit 4-14  
Unit ID 4-14  
Store &Forward  
setting  
Speed 4-23  
definition of 4-8  
Serial Port Cable  
Pin-outs C-1  
Stop Bit 4-23  
Slide-in Option Slot, description of 1-2  
SNMP Traps  
SuperStack™ II Switch 2000 TR  
description of 1-1  
initializing 4-24  
size E-1  
Stack configuration 3-3  
weight E-1  
Switch Database  
Unit Name 4-14  
Unit Defaults  
Unit Statistics 6-2  
Broadcasts 6-2  
Clear Screen Counters 6-2  
Filtered 6-2  
setting 4-21  
Community String 4-22  
IP Address 4-22  
Throttle 4-22  
configuring 4-20  
Forwarded 6-2  
Received 6-2  
Transmitted 6-2  
viewing 6-2  
Database Entries 4-20  
Ageing Entries 4-19  
Permanent Entries 4-19  
DELETE 4-21  
FIND 4-20  
INSERT 4-21  
MAC Address 4-20  
Port Number 4-20  
Port/MAC Address 4-20  
REFRESH 4-21  
Software Image, downloading new A-3  
Software Upgrade Utility, description of A-1  
Software, upgrading 3-19  
Source Routing, prerequisites 3-6  
Spanning Tree  
802.1d Spanning Tree 1-16  
Bridge Hello Time 4-5  
Bridge Max Age 4-5  
definition of 4-5  
URL F-1  
Users, changing  
Community String 4-18  
Confirm Password 4-18  
New Password 4-18  
Old Password 4-18  
User Name 4-18  
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4
V
Virtual LAN Trunks. See VLTs  
VLAN Setup screen 4-12  
VLAN Support, description of 1-2  
VLANs  
assigning ports 4-13  
Default 4-13, 7-3  
extending into an ATM network 7-4  
using Non-routable protocols 7-4  
using unique MAC addresses 7-4  
VLTs 7-4  
VLTs 7-4  
VT100 Console  
Button 3-7  
Choice Field 3-6  
Correcting Text Entries 3-8  
Entry Field 3-7  
Keyboard Shortcuts 3-7  
List Boxes 3-7  
Menu Map 3-9  
VT100 Management Interface  
Via an IP Network Connection 3-2  
Via the Serial Port 3-2  
VT100 Management Interface, description  
of 3-2  
VT100 Terminal, connecting a 2-6  
W
Wall Mounting, instructions 2-5  
warnings in text  
defined  
2
Why 1-14  
Work Group ID  
Management Setup Fields 3-12  
World Wide Web (WWW) F-1  
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defective product, accompanied by a copy of the dated proof of purchase, to the 3Com  
Corporate Service Center or to an Authorized 3Com Service Center during the  
applicable warranty period. Standard warranty service for software products may be  
obtained by telephoning 3Com’s Corporate Service Center or an Authorized 3Com  
Service Center, within the warranty period. Products returned to the 3Com Corporate  
Service Center must be preauthorized by 3Com with a Return Material Authorization  
(RMA) number marked on the outside of the package, and sent prepaid, insured, and  
packaged appropriately for safe shipment. The repaired or replaced item will be shipped  
to Customer, at the expense of 3Com, not later than thirty (30) days after receipt of the  
defective product by 3Com.  
3Com Corporation LIMITED WARRANTY  
The duration of the warranty for the SuperStack II Switch 2000 TR, is n years.  
HARDWARE  
3Com warrants its hardware products to be free from defects in workmanship and  
materials, under normal use and service, for the following lengths of time from the date  
of purchase from 3Com or its Authorized Reseller:  
Network interface cards  
Lifetime  
1 year  
WARRANTIES EXCLUSIVE  
Other hardware products (unless otherwise specified in the warranty  
statement above)  
IF A 3COM PRODUCT DOES NOT OPERATE AS WARRANTED ABOVE, CUSTOMER’S  
SOLE REMEDY FOR BREACH OF THAT WARRANTY SHALL BE REPAIR, REPLACEMENT,  
OR REFUND OF THE PURCHASE PRICE PAID, AT THE OPTION OF 3COM. TO THE FULL  
EXTENT ALLOWED BY LAW, THE FOREGOING WARRANTIES AND REMEDIES ARE  
EXCLUSIVE AND ARE IN LIEU OF ALL OTHER WARRANTIES, TERMS, OR CONDITIONS,  
EXPRESS OR IMPLIED, EITHER IN FACT OR BY OPERATION OF LAW, STATUTORY OR  
OTHERWISE, INCLUDING WARRANTIES, TERMS, OR CONDITIONS OF  
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND SATISFACTORY  
QUALITY. 3COM NEITHER ASSUMES NOR AUTHORIZES ANY OTHER PERSON TO  
ASSUME FOR IT ANY OTHER LIABILITY IN CONNECTION WITH THE SALE,  
INSTALLATION, MAINTENANCE, OR USE OF ITS PRODUCTS.  
Spare parts and spares kits  
90 days  
If a product does not operate as warranted above during the applicable warranty  
period, 3Com shall, at its option and expense, repair the defective product or part,  
deliver to Customer an equivalent product or part to replace the defective item, or  
refund to Customer the purchase price paid for the defective product. All products that  
are replaced will become the property of 3Com. Replacement products may be new or  
reconditioned. Any replaced or repaired product or part has a ninety (90) day warranty  
or the remainder of the initial warranty period, whichever is longer.  
3COM SHALL NOT BE LIABLE UNDER THIS WARRANTY IF ITS TESTING AND  
EXAMINATION DISCLOSE THAT THE ALLEGED DEFECT IN THE PRODUCT DOES NOT  
EXIST OR WAS CAUSED BY CUSTOMER’S OR ANY THIRD PERSON’S MISUSE, NEGLECT,  
IMPROPER INSTALLATION OR TESTING, UNAUTHORIZED ATTEMPTS TO REPAIR OR  
MODIFY, OR ANY OTHER CAUSE BEYOND THE RANGE OF THE INTENDED USE, OR BY  
ACCIDENT, FIRE, LIGHTNING, OR OTHER HAZARD.  
3Com shall not be responsible for any software, firmware, information, or memory data  
of Customer contained in, stored on, or integrated with any products returned to 3Com  
for repair, whether under warranty or not.  
SOFTWARE  
LIMITATION OF LIABILITY  
3Com warrants that the software programs licensed from it will perform in substantial  
conformance to the program specifications therefor for a period of ninety (90) days  
from the date of purchase from 3Com or its Authorized Reseller. 3Com warrants the  
media containing software against failure during the warranty period. No updates are  
provided. The sole obligation of 3Com with respect to this express warranty shall be (at  
the discretion of 3Com) to refund the purchase price paid by Customer for any defective  
software products, or to replace any defective media with software which substantially  
conforms to applicable 3Com published specifications. Customer assumes responsibility  
for the selection of the appropriate applications program and associated reference  
materials. 3Com makes no warranty or representation that its software products will  
work in combination with any hardware or applications software products provided by  
third parties, that the operation of the software products will be uninterrupted or error  
free, or that all defects in the software products will be corrected. For any third-party  
products listed in the 3Com software product documentation or specifications as being  
compatible, 3Com will make reasonable efforts to provide compatibility, except where  
the noncompatibility is caused by a “bug” or defect in the third party’s product.  
TO THE FULL EXTENT ALLOWED BY LAW, 3COM ALSO EXCLUDES FOR ITSELF AND ITS  
SUPPLIERS ANY LIABILITY, WHETHER BASED IN CONTRACT OR TORT (INCLUDING  
NEGLIGENCE), FOR INCIDENTAL, CONSEQUENTIAL, INDIRECT, SPECIAL, OR PUNITIVE  
DAMAGES OF ANY KIND, OR FOR LOSS OF REVENUE OR PROFITS, LOSS OF BUSINESS,  
LOSS OF INFORMATION OR DATA, OR OTHER FINANCIAL LOSS ARISING OUT OF OR IN  
CONNECTION WITH THE SALE, INSTALLATION, MAINTENANCE, USE, PERFORMANCE,  
FAILURE, OR INTERRUPTION OF ITS PRODUCTS, EVEN IF 3COM OR ITS AUTHORIZED  
RESELLER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES, AND LIMITS ITS  
LIABILITY TO REPAIR, REPLACEMENT, OR REFUND OF THE PURCHASE PRICE PAID, AT  
THE OPTION OF 3COM. THIS DISCLAIMER OF LIABILITY FOR DAMAGES WILL NOT BE  
AFFECTED IF ANY REMEDY PROVIDED HEREIN SHALL FAIL OF ITS ESSENTIAL PURPOSE.  
GOVERNING LAW  
This Limited Warranty shall be governed by the laws of the State of California, U.S.A.  
Some countries, states, or provinces do not allow the exclusion or limitation of liability  
of implied warranties or the limitation of incidental or consequential damages for  
certain products supplied to consumers or the limitation for personal injury, so the  
above limitations and exclusions may be limited in their application to you. This  
STANDARD WARRANTY SERVICE  
Standard warranty service for hardware products may be obtained by delivering the  
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