3Com Switch 3C16950 User Manual

®
SuperStack II Switch 1100  
User Guide  
®
3C16950, 3C16951  
Part No. DUA1695-0AAA04  
Published April 1999  
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Matrix Port 16  
Network Configuration Examples 17  
Network Segmentation I 17  
Configuration Rules for Fast Ethernet 20  
Configuration Rules with Full Duplex 21  
2 INSTALLING THE SWITCH  
Choosing a Suitable Site 24  
Rack-mounting 24  
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The Power-up Sequence 29  
Connecting a Redundant Power System 29  
Powering-up the Switch 1100 29  
Managing the Switch 32  
Null Modem Cable 39  
3Com FTP Site 44  
3Com Bulletin Board Service 44  
3Com Facts Automated Fax Service 45  
Support from Your Network Supplier 45  
Support from 3Com 45  
Returning Products for Repair 47  
iv  
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GLOSSARY  
INDEX  
3COM CORPORATION LIMITED WARRANTY  
EMC STATEMENTS  
v
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vi  
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ABOUT THIS GUIDE  
This guide provides all the information you need to install and use a  
SuperStack® II Switch 1100 unit with default settings. If you want to  
change the way the Switch works using management software, refer to  
the “SuperStack II Switch Management Guide” (part number  
DUA1695-0BAA0x).  
The guide is intended for use by network administrators who are  
responsible for installing and setting up network equipment;  
consequently, it assumes a basic working knowledge of LANs (Local Area  
Networks).  
This guide is intended for use with both Switch 1100 models:  
3C16950 — 24 10BASE-T ports  
3C16951 — 12 10BASE-T ports  
All pictures and example screens show the 24-port model, however, all  
procedures apply to the 24-port model and the 12-port model.  
If the information in the release notes that are shipped with your product  
differs from the information in this guide, follow the instructions in the  
release notes.  
Most user guides and release notes are available in Adobe Acrobat  
Reader Portable Document Format (PDF) or HTML on the 3Com  
World Wide Web site:  
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8
ABOUT THIS GUIDE  
Conventions  
Table 1 and Table 2 list conventions that are used throughout this guide.  
Notice Icons  
Table 1  
Icon  
Notice Type  
Description  
Information note Information that describes important features or  
instructions  
Caution  
Warning  
Information that alerts you to potential loss of data or  
potential damage to an application, system, or device  
Information that alerts you to potential personal injury  
Text Conventions  
Table 2  
Convention  
Description  
Screen displays This typeface represents information as it appears on the  
screen.  
Syntax  
The word “syntax” means that you must evaluate the syntax  
provided and then supply the appropriate values for the  
placeholders that appear in angle brackets. Example:  
To enable RIPIP, use the following syntax:  
SETDefault !<port> -RIPIP CONTrol =  
Listen  
In this example, you must supply a port number for <port>.  
Commands  
The word “command” means that you must enter the  
command exactly as shown and then press Return or Enter.  
Commands appear in bold. Example:  
To remove the IP address, enter the following command:  
SETDefault !0 -IP NETaddr = 0.0.0.0  
The words “enter”  
and “type”  
When you see the word “enter” in this guide, you must type  
something, and then press Return or Enter. Do not press  
Return or Enter when an instruction simply says “type.”  
Keyboard key names If you must press two or more keys simultaneously, the key  
names are linked with a plus sign (+). Example:  
Press Ctrl+Alt+Del  
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Related Documentation  
9
Text Conventions (continued)  
Table 2  
Convention  
Description  
Words in italics  
Italics are used to:  
Emphasize a point.  
Denote a new term at the place where it is defined in the  
text.  
Identify menu names, menu commands, and software  
button names. Examples:  
From the Help menu, select Contents.  
Click OK.  
Related  
Documentation  
In addition to this guide, each Switch 1100 document set includes the  
following:  
Management Guide (Part Number DUA1695-0BAA0x)  
This guide contains all the management information for the Switch.  
Quick Reference Guide (Part Number DQA1695-0AAA0x)  
This guide contains a quick summary of the hardware and software  
information for the Switch  
Quick Installation Guide (Part Number DIA1695-0AAA0x)  
This guide contains a summary of the package contents, and a quick  
summary of the installation information for the Switch.  
Release Notes (Part Number DNA1695-0AAA0x)  
These notes provide information about the current software release,  
including new features, modifications, and known problems.  
SuperStack II Switch Help  
This help provides information about the web interface software of  
the Switch. It is supplied on the SuperStack II Switch CD-ROM.  
SuperStack II Switch README File  
This file provides information about the current software release,  
including new features, modifications, and known problems.  
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10  
ABOUT THIS GUIDE  
In addition, there are other publications you may find useful:  
Documentation accompanying the Expansion Modules.  
Documentation accompanying the Transceiver Modules.  
Documentation accompanying the Advanced Redundant Power  
System.  
Year 2000  
Compliance  
For information on Year 2000 compliance and 3Com products, visit the  
3Com Year 2000 Web page:  
Documentation  
Comments  
Your suggestions are very important to us. They will help make our  
documentation more useful to you. Please e-mail comments about this  
document to 3Com at:  
Please include the following information when commenting:  
Document title  
Document part number (on the title page)  
Page number (if appropriate)  
Example:  
SuperStack II Switch 1100 User Guide  
Part Number DUA1695-0AAA03  
Page 21  
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INTRODUCING THE SWITCH 1100  
1
This chapter contains introductory information about the Switch and how  
it can be used in your network. It covers the following topics:  
About the SuperStack II Switch 1100  
Switch 1100 — Front View Detail  
Switch 1100 — Rear View Detail  
Network Configuration Examples  
Configuration Rules for Fast Ethernet  
Configuration Rules with Full Duplex  
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12  
CHAPTER 1: INTRODUCING THE SWITCH 1100  
About the  
SuperStack II  
Switch 1100  
The SuperStack® II system solves the problem of growth in dynamic  
network environments and provides everything you need for successful  
workgroup networking. Much more than a collection of stackable  
components, the system comprises a complete, integrated architecture of  
modular parts that are easy to install and use.  
As part of this SuperStack II system, the Switch 1100 meets the challenge  
of modern LANs and allows you to add features and capacity as your  
network expands.  
Summary of Features The Switch has the following hardware features:  
12 or 24 Ethernet 10BASE-T ports  
Two Fast Ethernet auto-negotiating 10BASE-T/100BASE-TX ports  
Matrix port for connecting units in the Switch 1100/3300 family to  
form a stack:  
Connect two units back-to-back using a single Matrix Cable  
Connect up to four units using Matrix Cables linked to a Matrix  
Module  
Slot for an Expansion Module  
Slot for a Transceiver Module (10Mbps Ethernet)  
SuperStack II architecture:  
Connects to Redundant Power System / Uninterruptible Power  
System  
19-inch rack or stand-alone mounting  
For information about the software features of the Switch, refer to the  
“SuperStack II Switch Management Guide” (DUA1695-0BAA0x).  
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Switch 1100 — Front View Detail  
13  
Switch 1100 —  
Front View Detail  
Switch 1100 — Front view  
Figure 1  
Port Connections 10BASE-T Ports  
The Switch has 12 or 24 10BASE-T ports configured as MDIX (cross-over).  
The maximum segment length is 100m (328ft) over Category 3, 4, or 5  
twisted pair cable.  
As these ports are configured as MDIX (cross-over), you need to use a  
cross-over cable to connect to devices whose ports are MDIX-only. See  
“Choosing the Correct Cables” on page 30 for more information.  
10BASE-T/100BASE-TX Ports  
The Switch has two auto-negotiating 10BASE-T/100BASE-TX ports  
configured as MDIX (cross-over). These ports can be set to 10BASE-T half  
duplex, 10BASE-T full duplex, 100BASE-TX half duplex, 100BASE-TX full  
duplex, or they can automatically detect the speed and duplex mode of a  
link and provide the appropriate connection. The maximum segment  
length is 100m (328ft) over Category 5 twisted pair cable.  
As these ports are configured as MDIX (cross-over), you need to use a  
cross-over cable to connect to devices whose ports are MDIX-only. See  
“Choosing the Correct Cables” on page 30 for more information.  
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14  
CHAPTER 1: INTRODUCING THE SWITCH 1100  
LEDs Table 3 lists the LEDs visible on the front of the Switch, and their states  
according to color. For information on using the LEDs for problem solving,  
see “Checking for Correct Operation” on page 29.  
LED behavior  
Table 3  
LED  
Color  
Indicates  
TCVR  
Yellow  
Port 1 is a Transceiver Module fitted to the rear of the  
Switch.  
Off  
Port 1 is operating as a 10BASE-T port.  
Port Status LEDs  
Packet  
Yellow  
Off  
Packets are being transmitted/received on the port.  
No packets are being transmitted/received on the port.  
A link is present, and the port is enabled.  
A link is present, but the port is disabled.  
No link is present.  
Status  
Green  
Green flashing  
Off  
Expansion Module Port Status LEDs  
Packet  
Yellow  
Packets are being transmitted/received on the  
Expansion Module port(s).  
Off  
No packets are being transmitted/received on the  
Expansion Module port(s).  
Status  
Yellow  
A valid Expansion Module is installed.  
Yellow flashing An unrecognized Expansion Module is installed.  
Off  
No Expansion Module is installed.  
Unit LEDs  
1–8  
Green  
The Switch forms a stack with other Switch units; the  
LED indicates the position of the Switch in the stack  
and that a link is present. Note that although there are  
eight LEDs, only four Switch units can be stacked at  
present.  
Off  
The Switch is stand-alone.  
Power/Self Test LED  
Green  
The Switch is powered-up.  
Green flashing  
The Switch is either downloading software or is  
initializing (which includes running a Power On Self  
Test).  
Yellow  
Off  
The Switch has failed its Power On Self Test.  
The Switch is not receiving power.  
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Switch 1100 — Rear View Detail  
15  
Switch 1100 — Rear  
View Detail  
Switch 1100 — Rear view  
Figure 2  
Unit Information This label shows the following:  
Label  
The 3Com product name of the Switch  
The 3Com 3C number of the Switch  
The unique MAC address (Ethernet address) of the Switch  
The serial number of the Switch  
Power Socket The Switch automatically adjusts its power setting to any supply voltage  
in the range 90–240V A.C.  
Redundant Power To protect against internal power supply failure, you can use this socket  
System Socket to connect a SuperStack II Advanced Redundant Power System (RPS) to  
the Switch. See “Connecting a Redundant Power System” on page 29.  
Console Port The console port allows you to connect a terminal and perform remote or  
local out-of-band management. The console port uses standard null  
modem cable and is set to auto-baud, 8 data bits, no parity and 1 stop  
bit.  
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16  
CHAPTER 1: INTRODUCING THE SWITCH 1100  
Expansion Module You can use this slot to install an Expansion Module; for example, a  
Slot 100BASE-FX Module that provides an additional high-speed link, or a  
Matrix Module that provides four matrix ports for stacking Switch units  
together. 3Com provides a range of Expansion Modules; contact your  
supplier for availability. For more information about Matrix Modules, see  
“Stacking Units” on page 26.  
When an Expansion Module is not installed, ensure the blanking plate is  
secured in place.  
Transceiver Module You can use this slot to install a Transceiver Module. When a Transceiver  
Slot Module is installed, the Transceiver Module port becomes port 1 and the  
port labelled 1 on the front panel becomes inactive. The Transceiver  
Module can provide a 10Mbps Ethernet half duplex link to the rest of  
your network using various media such as fiber and coaxial cabling.  
When a Transceiver Module is not installed, ensure the blanking plate is  
secured in place.  
Matrix Port The matrix port allows you to:  
Stack the Switch with another unit in the Switch 1100/3300 family  
using a single Matrix Cable  
Stack the Switch with up to three other units in the Switch 1100/3300  
family, if one of the units has a Matrix Module installed  
For more information about the role of the matrix port, see “Stacking  
Units” on page 26.  
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Network Configuration Examples  
17  
Network  
Configuration  
Examples  
The following illustrations show some examples of how the Switch can be  
placed on your network.  
Figure 3 shows how the Switch 1100 fits into a large corporate network  
with a Fast Ethernet infrastructure. A Switch is positioned on each floor  
and servers are centralized in the basement.  
Network  
Segmentation I  
Using the Switch 1100 to segment your network  
Figure 3  
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18  
CHAPTER 1: INTRODUCING THE SWITCH 1100  
Network Figure 4 shows the Switch 1100 in a second workgroup situation. This  
Segmentation II setup could be that of a small office within a large corporation, or part of  
a larger corporate network. Most of the switch ports have multiple  
endstations.  
Using the Switch 1100 to segment your network  
Figure 4  
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Network Configuration Examples  
19  
Figure 5 shows the Switch 1100 used for a group of users in a large  
corporate network. Here switching is brought to the desktop with a  
Desktop Switching  
single endstation per port. Local servers are connected via 100Mbps Fast  
Ethernet links.  
Using the Switch 1100 in a desktop environment  
Figure 5  
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20  
CHAPTER 1: INTRODUCING THE SWITCH 1100  
Configuration Rules  
for Fast Ethernet  
The topology rules for 100Mbps Fast Ethernet are slightly different to  
those for 10Mbps Ethernet. Figure 6 illustrates the key topology rules and  
provides examples of how they allow for large-scale Fast Ethernet  
networks.  
Fast Ethernet configuration rules  
Figure 6  
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Configuration Rules with Full Duplex  
21  
The key topology rules are:  
Maximum UTP cable length is 100m (328ft) over Category 5 cable.  
A 412m (1352ft) fiber run is allowed for connecting switch-to-switch,  
or endstation-to-switch, using half-duplex 100BASE-FX.  
A total network span of 325m (1066ft) is allowed in single-repeater  
topologies (one hub stack per wiring closet with a fiber run to the  
collapsed backbone); for example, a 225m (738ft) fiber link from a  
repeater to a router or switch, plus a 100m (328ft) UTP link from a  
repeater out to the endstations.  
Configuration Rules  
with Full Duplex  
The Switch provides full duplex support for all its fixed ports, including  
Expansion Module ports. Full duplex allows packets to be transmitted and  
received simultaneously and, in effect, doubles the potential throughput  
of a link.  
With full duplex, the Ethernet topology rules are the same, but the Fast  
Ethernet rules are:  
Maximum UTP cable length is 100m (328ft) over Category 5 cable.  
A 2km (6562ft) fiber link is allowed for connecting switch-to-switch,  
or endstation-to-switch.  
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22  
CHAPTER 1: INTRODUCING THE SWITCH 1100  
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INSTALLING THE SWITCH  
2
This chapter contains the information you need to install and set up the  
Switch. It covers the following topics:  
Choosing a Suitable Site  
Rack-mounting  
Placing Units On Top of Each Other  
Stacking Units  
The Power-up Sequence  
Choosing the Correct Cables  
Solving Problems Indicated by LEDs  
Managing the Switch  
WARNING: Safety Information. Before installing or removing any  
components from the Switch 1100 or carrying out any maintenance  
procedures, you must read the safety information provided in Appendix A  
of this guide.  
AVERTISSEMENT: Consignes de sécurité. Avant d'installer ou d'enlever  
tout composant du Switch 1100 ou d'entamer une procédure de  
maintenance, lisez les informations relatives à la sécurité qui se trouvent  
dans l'Appendice A de ce guide.  
WARNHINWEIS: Sicherheitsinformationen. Bevor Sie Komponenten  
aus dem Switch 1100 entfernen oder dem Switch 3300 hinzufuegen  
oder Instandhaltungsarbeiten verrichten, lesen Sie die  
Sicherheitsanweisungen, die in Appendix A (Anhang A) in diesem  
Handbuch aufgefuehrt sind.  
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24  
CHAPTER 2: INSTALLING THE SWITCH  
Choosing a Suitable  
Site  
The Switch is suited for use in an office environment where it can be  
Alternatively, the Switch can be rack-mounted in a wiring closet or  
equipment room. A rack-mounting kit, containing two mounting  
brackets and six screws, is supplied with the Switch.  
When deciding where to position the Switch, ensure that:  
You are able to meet the configuration rules detailed in  
“Configuration Rules for Fast Ethernet” on page 20.  
The Switch is accessible and cables can be connected easily.  
Cabling is away from:  
Sources of electrical noise such as radios, transmitters and  
broadband amplifiers  
Power lines and fluorescent lighting fixtures  
Water or moisture cannot enter the case of the Switch.  
Air-flow is not restricted around the Switch or through the vents in the  
side of the Switch. We recommend that you provide a minimum of  
25mm (1in.) clearance.  
No more than four Switch units are placed on top of one another, if  
the units are free standing.  
Rack-mounting  
The Switch is 1.5U high and fits in most standard 19-inch racks.  
CAUTION: Disconnect all cables from the Switch before continuing.  
Remove all self adhesive pads from the underside of the Switch if they  
have been fitted.  
1 Place the Switch the right way up on a hard flat surface, with the front  
facing towards you.  
2 Locate a mounting bracket over the mounting holes on one side of the  
Switch, as shown in Figure 7.  
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Placing Units On Top of Each Other  
25  
Fitting a bracket for rack mounting  
Figure 7  
3 Insert the three screws and tighten with a suitable screwdriver.  
You must use the screws supplied with the mounting brackets. Damage  
caused to the unit by using incorrect screws invalidates your warranty.  
4 Repeat steps 2 and 3 for the other side of the Switch.  
5 Insert the Switch into the 19-inch rack and secure with suitable screws  
(not provided). Ensure that ventilation holes are not obstructed.  
6 Connect network cabling.  
Placing Units On  
Top of Each Other  
If the Switch units are free-standing, up to four units can be placed one  
on top of the other. If you are mixing a variety of SuperStack II Switch and  
Hub units, the smaller units must be positioned at the top.  
If you are placing Switch units one on top of the other, you must use the  
self-adhesive rubber pads supplied. Apply the pads to the underside of  
each Switch, sticking one in the marked area at each corner. Place the  
Switch units on top of each other, ensuring that the pads of the upper  
unit line up with the recesses of the lower unit.  
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26  
CHAPTER 2: INSTALLING THE SWITCH  
Stacking Units  
Units in the Switch 1100/3300 family can be stacked together and then  
treated as a single manageable unit with one IP address.  
You can stack Switch units together in two ways:  
The matrix port on the rear of the Switch allows you to connect two  
Switch units back-to-back. For this you need a Matrix Cable (part  
number 3C16965). Contact your supplier for details.  
The Expansion Module slot at the rear of the Switch allows you to  
install a Matrix Module (part number 3C16960). The Matrix Module  
provides four ports and allows you to interconnect up to four Switch  
units using Matrix Cables.  
Stacking Two Units You can stack two Switch units with a single Matrix Cable. To do this:  
1 Power-off both units.  
2 Arrange the units as required. They can be rack-mounted or  
free-standing; if you choose to have them free-standing, remember to  
position the rubber feet as detailed in “Placing Units On Top of Each  
Other” on page 25. When positioning the units, note that Matrix Cables  
are 1m (3.28ft) long.  
3 As shown in Figure 8, connect one end of the Matrix Cable to the matrix  
port of the top Switch, and the other end to the matrix port of the lower  
Switch.  
4 If you use the management software of the units:  
Ensure that both units have the same version of management  
software  
Ensure that you re-configure the stack-wide features on both units  
For more information about management software, see “Managing the  
Switch” on page 32.  
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Stacking Units  
27  
A stack of two units  
Figure 8  
Stacking Up To Four You can stack up to four Switch units with a single SuperStack II Switch  
Units Matrix Module and the appropriate number of Matrix Cables.  
You only need one Matrix Module for each stack.  
To stack up to four Switch units:  
1 Power-off all the units.  
2 Arrange the units as required. They can be rack-mounted or  
free-standing; if you choose to have them free-standing, remember to  
position the rubber feet as detailed in “Placing Units On Top of Each  
Other” on page 25. When positioning the units, note that Matrix Cables  
are 1m (3.28ft) long.  
3 Install the Matrix Module into one of the units. You can find instructions  
for doing this in the documentation that accompanies the Matrix  
Module. We recommend that for ease of configuration, the Matrix  
Module should be installed in the bottom Switch of your stack.  
4 Connect the Matrix Cables, as shown in Figure 9:  
a Connect a Matrix Cable to the port marked Unit 1 on the Matrix  
Module. Connect the other end of this cable to the matrix port of the  
Switch that contains the Matrix Module.  
b Connect a second Matrix Cable to the port marked Unit 2 on the  
Matrix Module. Connect the other end of this cable to the matrix port  
of the second Switch.  
c Repeat steps a and b for any additional units.  
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28  
CHAPTER 2: INSTALLING THE SWITCH  
5 If you use the management software of the units:  
Ensure that all the units have the same version of management  
software  
Ensure that you re-configure the stack-wide features on all the units  
For more information about management software, see “Managing the  
Switch” on page 32.  
A stack of units with a Matrix Module  
Figure 9  
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The Power-up Sequence  
29  
The Power-up  
Sequence  
The following sections describe how to get your Switch 1100  
powered-up and ready for operation.  
You can connect a SuperStack II Advanced Redundant Power System  
Connecting a  
(part number 3C16071) to the Switch. This unit, which is also known as  
an RPS, is designed to maintain the power to your Switch if a power  
supply failure occurs.  
Redundant Power  
System  
If your Switch has no Expansion Module installed, or has a Matrix Module  
or 100BASE-FX Module installed, the RPS unit requires one 60W Power  
Module (part number 3C16072).  
If your Switch has another Expansion Module installed, the RPS unit  
requires one 100W Power Module (part number 3C16073).  
CAUTION: The Switch can only use a SuperStack II Advanced  
Redundant Power System output.  
Use the following sequence of steps to power-up the Switch.  
Powering-up the  
Switch 1100  
CAUTION: The Switch has no ON/OFF switch; the only method of  
connecting or disconnecting main power is by connecting or  
disconnecting the power cord.  
Plug the power cord into the power socket at the rear of the Switch.  
Plug the other end of the power cord into your power outlet  
1
2
The Switch powers-up and runs through its Power On Self Test (POST),  
which takes approximately 12 seconds.  
During the Power On Self Test, all ports on the Switch are disabled and  
the LEDs light in the following sequence:  
Checking for Correct  
Operation  
All unit LEDs light  
Module LEDs light  
Port Status LEDs light in a rapid cycle  
When the POST has completed, check the Power/Self Test LED to check  
that your Switch is operating correctly. Table 4 shows possible colors for  
the LED.  
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30  
CHAPTER 2: INSTALLING THE SWITCH  
LED colors  
Table 4  
Color  
State  
Green  
The Switch is powered-up and  
operating normally  
Yellow  
Off  
The Switch has failed its Power On Self  
Test. This occurs if any of the ports fail  
during power-up.  
The Switch is not receiving power.  
If there is evidence of a problem, see “Solving Problems Indicated by  
LEDs” on page 31.  
Choosing the  
Correct Cables  
All of the ports on the front of the Switch 1100 are configured as MDIX  
(cross-over). If you want to make a connection to another MDIX port, you  
need a cross-over cable. Most of the 10BASE-T and 100BASE-TX ports on  
3Com devices are MDIX-only. Many ports on workstations and servers are  
configured as MDI (straight-through). If you want to make a connection  
to an MDI port, you need to use a standard straight-through cable. This is  
illustrated in Figure 10.  
Connecting other devices to the Switch 1100  
Figure 10  
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Solving Problems Indicated by LEDs  
31  
Solving Problems  
Indicated by LEDs  
If the LEDs on the Switch indicate a problem, refer to Table 5 which  
contains a list of possible problems and suggested solutions.  
Problems indicated by LEDs  
Table 5  
Problem  
Suggested Solution  
A Power LED does not Check that the power cable is firmly connected to the  
light  
relevant Switch unit and to the supply outlet. If the  
connection is secure and there is still no power, you may  
have a faulty power cord.  
On powering-up, the  
Power/Self Test LED  
lights yellow and a  
Unit LED lights green  
The relevant Switch unit has failed its Power On Self Test  
(POST) because of an internal problem. Contact your  
supplier for advice.  
An Expansion Module An unrecognized Expansion Module is installed into the  
Status LED flashes  
yellow  
relevant Switch unit. You may need to remove the  
Module, or upgrade the management software used by  
the Switch to a version that recognizes the Module.  
Contact your supplier for further advice.  
A link is connected and Check that:  
yet the Status LED for  
the port does not light  
All connections are secure.  
The devices at both ends of the link are powered-up.  
The connection uses cross-over cable if you are  
linking a 10BASE-T or 100BASE-TX port with a device  
that is MDIX-only.  
The Packet LED for a  
10BASE-T port is lit,  
The 10BASE-T port is connected to a  
10BASE-T/100BASE-TX port or a 100BASE-TX port. Do  
but the Status LED for one of the following:  
that port does not  
light  
If the 10BASE-T port is connected to a  
10BASE-T/100BASE-TX port, enable auto-negotiation  
on the 10BASE-T/100BASE-TX port, or set the  
10BASE-T/100BASE-TX port to 10Mbps.  
If the 10BASE-T port is connected to a 100BASE-TX  
port, move the 10BASE-T connection to a  
100BASE-TX connection.  
The Packet LED for an If you have a Matrix Module installed into your Switch,  
Expansion Module is  
this is normal operation. Management software in the  
flashing even though stack passes packets between units even if there is no  
there is no external  
traffic on this link  
other traffic activity.  
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32  
CHAPTER 2: INSTALLING THE SWITCH  
For information about solving problems when managing the Switch, refer  
to the Problem Solving chapter in the “SuperStack II Switch Management  
Guide” (DUA1695-0BAA0x).  
Managing the  
Switch  
The Switch contains software that allows you to change and monitor the  
way it works. This management software is not required to get the  
Switch working, but if you do use it, you may improve the efficiency of  
the Switch and therefore improve the overall performance of your  
network. For information on managing the Switch using the  
management software, refer to the “SuperStack II Switch Management  
Guide” (part number DUA1695-0BAA0x).  
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SAFETY INFORMATION  
A
You must read the following safety information before carrying out any  
installation or removal of components, or any maintenance procedures  
on the Switch 1100.  
WARNING: Warnings contain directions that you must follow for your  
personal safety. Follow all directions carefully.  
You must read the following safety information carefully before you  
install or remove the unit.  
AVERTISSEMENT: Les avertissements présentent des consignes que vous  
devez respecter pour garantir votre sécurité personnelle. Vous devez  
respecter attentivement toutes les consignes.  
Nous vous demandons de lire attentivement les consignes suivantes de  
sécurité avant d’installer ou de retirer l’appareil.  
WARNHINWEIS: Warnhinweise enthalten Anweisungen, die Sie zu Ihrer  
eigenen Sicherheit befolgen müssen. Alle Anweisungen sind sorgfältig zu  
befolgen.  
Sie müssen die folgenden Sicherheitsinformationen’ sorgfältig  
durchlesen, bevor Sie das Gerät installieren oder ausbauen.  
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34  
APPENDIX A: SAFETY INFORMATION  
Important Safety  
Information  
Installation and removal of the unit must be carried out by qualified  
personnel only.  
If installing the Switch unit in a stack with SuperStack II Hub units, the  
Switch 1100 unit must be installed below the narrower Hub units.  
The unit should never be connected to an A.C. outlet (power supply)  
without an earth (ground) connection.  
The unit must be connected to an earthed (grounded) outlet to  
comply with European safety standards.  
Power Cord Set:  
This must be approved for the country where it is used:  
USA and  
Canada  
The cord set must be UL-approved and CSA certified.  
The minimum specification for the flexible cord is:  
No. 18 AWG  
Type SV or SJ  
3-conductor  
The cord set must have a rated current capacity of at least  
10A.  
The attachment plug must be an earth-grounding type  
with a NEMA 5-15P (15A, 125V) or NEMA 6-15P (15A,  
250V) configuration.  
Denmark  
The supply plug must comply with section 107-2-D1,  
standard DK2-1a or DK2-5a.  
Switzerland  
The supply plug must comply with SEV/ASE 1011.  
The appliance coupler (the connector to the unit and not the wall  
plug) must have a configuration for mating with an EN60320/IEC320  
appliance inlet.  
The socket outlet must be near to the unit and easily accessible. You  
can only remove power from the unit by disconnecting the power  
cord from the outlet.  
This unit operates under SELV (Safety Extra Low Voltage) conditions  
according to IEC 950. The conditions are only maintained if the  
equipment to which it is connected also operates under SELV  
conditions.  
Switzerland only:  
The supply plug must comply with SEV/ASE 1011.  
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Important Safety Information  
35  
France and Peru only:  
This unit cannot be powered from IT† supplies. If your supplies are of  
IT type, this unit must be powered by 230V (2P+T) via an isolation  
transformer ratio 1:1, with the secondary connection point labelled  
Neutral, connected directly to earth (ground).  
†Impédance à la terre.  
UK only:  
The Switch 1100 is covered by Oftel General Approval,  
NS/G/12345/J/100003, for indirect connection to a public  
telecommunications system. This can only be achieved using the  
console port on the unit and an approved modem.  
Sockets for Redundant Power System (RPS):  
Only connect an Advanced Redundant Power System (3C16071) to  
the Redundant Power System socket.  
WARNING: RJ45 Ports. These are shielded RJ45 data sockets. They  
cannot be used as telephone sockets. Only connect RJ45 data connectors  
to these sockets.  
Either shielded or unshielded data cables with shielded or unshielded  
jacks can be connected to these data sockets.  
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36  
APPENDIX A: SAFETY INFORMATION  
Linformation de  
Sécurité Importante  
L'installation et la dépose de ce groupe doivent être confiés à un  
personnel qualifié.  
Si vous entassez l'unité Switch avec les unités SuperStack II Hub,  
l'unité Switch 1100 doit être installée en dessous des unités Hub plus  
étroites.  
Lunité ne devrait pas etre branchee a une prise de courant C.A.  
(source de courant) sous aucun prétexte sans un branchement mise à  
la terre (mise à la masse).  
Vous devez raccorder ce groupe à une sortie mise à la terre (mise à la  
masse) afin de respecter les normes européennes de sécurité.  
Cordon électrique:  
Il doit être agréé dans le pays d'utilisation :  
Etats-Unis et  
Canada  
Le cordon doit avoir reçu l'homologation des UL et un  
certificat de la CSA  
Le cordon souple doit respecter, à titre minimum, les  
spécifications suivantes :  
calibre 18 AWG  
type SV ou 5J  
à 3 conducteurs  
Le cordon doit être en mesure d'acheminer un courant  
nominal d'au moins 10 A  
La prise femelle de branchement doit être du type à mise à la  
terre (mise à la masse) et respecter la configuration NEMA  
5-15P (15 A, 125 V) ou NEMA 6-15P (15 A, 250 V)  
Danemark  
Suisse  
La prise mâle d'alimentation doit respecter la section 107-2  
D1 de la norme DK2 1a ou DK2 5a  
La prise mâle d'alimentation doit respecter la norme SEV/ASE  
1011  
Le coupleur d'appareil (le connecteur du groupe et non pas la prise  
murale) doit respecter une configuration qui permet un branchement  
sur une entrée d'appareil EN60320/CEI 320.  
La prise secteur doit se trouver à proximité de l’appareil et son accès  
doit être facile. Vous ne pouvez mettre l’appareil hors circuit qu'en  
débranchant son cordon électrique au niveau de cette prise.  
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L’information de Sécurité Importante  
37  
Lappareil fonctionne à une tension extrêmement basse de sécurité qui  
est conforme à la norme CEI 950. Ces conditions ne sont maintenues  
que si l'équipement auquel il est raccordé fonctionne dans les mêmes  
conditions.  
France et Pérou uniquement:  
Ce groupe ne peut pas être alimenté par un dispositif à impédance à  
la terre. Si vos alimentations sont du type impédance à la terre, ce  
groupe doit être alimenté par une tension de 230 V (2 P+T) par le biais  
d'un transformateur d'isolement à rapport 1:1, avec un point  
secondaire de connexion portant l'appellation Neutre et avec  
raccordement direct à la terre (masse).  
Branchez uniquement un Advanced Redundant Power System  
(3C16071) sur la prise femelle du Redundant Power System.  
AVERTISSEMENT: Les ports RJ45. Il s'agit de prises femelles blindées de  
données RJ45. Vous ne pouvez pas les utiliser comme prise de téléphone.  
Branchez uniquement des connecteurs de données RJ45 sur ces prises  
femelles.  
Les câbles de données blindés ou non blindés, avec les jacks blindés ou  
non blindés, l'un ou l'autre, peuvent être branchés à ces prises de courant  
de données.  
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38  
APPENDIX A: SAFETY INFORMATION  
Wichtige  
Sicherheitsinformat  
ionen  
Die Installation und der Ausbau des Geräts darf nur durch  
Fachpersonal erfolgen.  
Wenn die Switch 1100 Einheit in einer Stapel mit anderen SuperStack  
II Hub Einheiten eingebaut werden soll, muß die Switch 1100 Einheit  
unter die schmaleren Hub Einheiten eingebaut werden.  
Das Gerät ist unter keinen umständen an einen Wechselstrom (A.C.)  
Netzstecker anzuschließen ohne erdungsleitung.  
Das Gerät muß an eine geerdete Steckdose angeschlossen werden,  
die die europäischen Sicherheitsnormen erfüllt.  
Der Anschlußkabelsatz muß mit den Bestimmungen des Landes  
übereinstimmen, in dem er verwendet werden soll.  
Der Gerätestecker (der Anschluß an das Gerät, nicht der  
Wandsteckdosenstecker) muß eine passende Konfiguration für einen  
Geräteeingang gemäß EN60320/IEC320 haben.  
Die Netzsteckdose muß in der Nähe des Geräts und leicht zugänglich  
sein. Die Stromversorgung des Geräts kann nur durch Herausziehen  
des Gerätenetzkabels aus der Netzsteckdose unterbrochen werden.  
Der Betrieb dieses Geräts erfolgt unter den SELV-Bedingungen  
(Sicherheitskleinstspannung) gemäß IEC 950. Diese Bedingungen sind  
nur gegeben, wenn auch die an das Gerät angeschlossenen Geräte  
unter SELV-Bedingungen betrieben werden.  
Nur ein Advanced Redundant Power System (3C16071) an den  
Redundant Power System Anschluß anschließen.  
: RJ45 Ports. RJ45-Anschlüsse. Dies sind abgeschirmte  
WARNHINWEIS  
RJ45-Datenbuchsen. Sie können nicht als Telefonanschlußbuchsen  
verwendet werden. An diesen Buchsen dürfen nur RJ45-Datenstecker  
angeschlossen werden.  
Diese Datenstecker können entweder mit abgeschirmten oder  
unabgeschirmten Datenkabeln mit abgeschirmten oder unabgeschirmten  
Klinkensteckern verbunden werden.  
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PIN-OUTS  
B
Null Modem Cable  
9-pin to RS-232 25-pin  
PC-AT Serial Cable  
9-pin to 9-pin  
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40  
APPENDIX B: PIN-OUTS  
Modem Cable  
9-pin to RS-232 25-pin  
RJ45 Pin  
Assignments  
Pin assignments are identical for 10BASE-T and 100BASE-TX RJ45  
connectors  
Pin assignments  
Table 6  
Pin Number  
Signal  
Function  
Ports configured as MDI  
1
TxData +  
Transmit data  
Transmit data  
Receive Data  
2
TxData –  
3
RxData +  
4
Not assigned  
Not assigned  
RxData –  
5
6
Receive data  
7
Not assigned  
Not assigned  
8
Ports configured as MDIX  
1
2
3
4
5
6
7
8
RxData +  
Receive Data  
Receive Data  
Transmit data  
RxData –  
TxData +  
Not assigned  
Not assigned  
TxData –  
Transmit data  
Not assigned  
Not assigned  
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TECHNICAL SPECIFICATIONS  
C
Physical Dimensions  
Height: 76mm (3.0 in.) x Width: 483mm (19.0 in.) x Depth 300mm (12.0 in.)  
Weight: 4.4kg (9.7lbs)  
Environmental Requirements  
Operating Temperature  
Storage Temperature  
Operating Humidity  
Standards  
0° to 50°C (32° to 122°F)  
–10° to +70°C (14° to 158°F)  
10 to 95% relative humidity, non-condensing  
EN60068 (IEC68)  
Safety  
Agency Certifications  
EMC  
UL 1950, EN60950, CSA 22.2 No. 950, IEC 950  
Emissions  
EN55022 Class B*, FCC Part 15 Subpart B Class A, ICES-003 Class A, VCCI  
Class B*, AS/NZS 3548 Class B*, CNS 13438 Class A  
* Category 5 screened cables must be used to ensure compliance with the class  
B requirements of this standard. The use of unscreened cables (category 3 or 5  
for 10BASE-T ports or category 5 for 100BASE-TX ports) complies with the class  
A requirements.  
Immunity  
EN50082-1  
Heat Dissipation  
Power Supply  
117 watts maximum (400 BTU/hour maximum)  
AC Line Frequency  
Input Voltage Options  
Current Rating  
50/60 Hz  
90–240 VAC  
3 amps (maximum)  
(continued)  
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42  
APPENDIX C: TECHNICAL SPECIFICATIONS  
Standards Supported  
SNMP  
Terminal Emulation  
Telnet (RFC 854)  
Protocols Used for Administration  
SNMP protocol (RFC 1157)  
MIB-II (RFC 1213)  
Bridge MIB (RFC 1493)  
Repeater MIB (RFC 1516)  
VLAN MIB (RFC 1573)  
RMON MIB (RFC 1271)  
BOOTP (RFC 951)  
UDP (RFC 768)  
IP (RFC 791)  
ICMP (RFC 792)  
TCP (RFC 793)  
ARP (RFC 826)  
TFTP (RFC 783)  
Year 2000 Compliance  
For information on Year 2000 Compliance and 3Com products, visit the 3Com  
Year 2000 Web page:  
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TECHNICAL SUPPORT  
D
3Com provides easy access to technical support information through a  
variety of services. This appendix describes these services.  
Information contained in this appendix is correct at time of publication. For  
the most recent information, 3Com recommends that you access the  
3Com Corporation World Wide Web site.  
Online Technical  
Services  
3Com offers worldwide product support 24 hours a day, 7 days a week,  
through the following online systems:  
World Wide Web site  
3Com Knowledgebase Web Services  
3Com FTP site  
3Com Bulletin Board Service (3Com BBS)  
SM  
3Com Facts Automated Fax Service  
World Wide Web Site To access the latest networking information on the 3Com Corporation  
World Wide Web site, enter this URL into your Internet browser:  
This service provides access to online support information such as technical  
documentation and software, as well as support options that range from  
technical education to maintenance and professional services.  
3Com This interactive tool contains technical product information compiled by  
Knowledgebase Web 3Com expert technical engineers around the globe. Located on the World  
Services Wide Web at http://knowledgebase.3com.com, this service gives all  
3Com customers and partners complementary, round-the-clock access to  
technical information on most 3Com products.  
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44  
APPENDIX D: TECHNICAL SUPPORT  
3Com FTP Site Download drivers, patches, software, and MIBs across the Internet from the  
3Com public FTP site. This service is available 24 hours a day, 7 days a week.  
To connect to the 3Com FTP site, enter the following information into  
your FTP client:  
Hostname: ftp.3com.com  
Username: anonymous  
Password: <your Internet e-mail address>  
You do not need a user name and password with Web browser software  
such as Netscape Navigator and Internet Explorer.  
3Com Bulletin Board The 3Com BBS contains patches, software, and drivers for 3Com products.  
Service This service is available through analog modem or digital modem (ISDN)  
24 hours a day, 7 days a week.  
Access by Analog Modem  
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:  
Country  
Australia  
Brazil  
Data Rate  
Telephone Number  
61 2 9955 2073  
55 11 5181 9666  
33 1 6986 6954  
4989 62732 188  
852 2537 5601  
39 2 27300680  
81 3 5977 7977  
52 5 520 7835  
Up to 14,400 bps  
Up to 28,800 bps  
Up to 14,400 bps  
Up to 28,800 bps  
Up to 14,400 bps  
Up to 14,400 bps  
Up to 14,400 bps  
Up to 28,800 bps  
Up to 14,400 bps  
Up to 14,400 bps  
Up to 28,800 bps  
Up to 53,333 bps  
France  
Germany  
Hong Kong  
Italy  
Japan  
Mexico  
P.R. of China  
Taiwan, R.O.C.  
U.K.  
86 10 684 92351  
886 2 377 5840  
44 1442 438278  
1 847 262 6000  
U.S.A.  
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Support from Your Network Supplier  
45  
Access by Digital Modem  
ISDN users can dial in to the 3Com BBS using a digital modem for fast  
access up to 64 Kbps. To access the 3Com BBS using ISDN, call the  
following number:  
1 847 262 6000  
The 3Com Facts automated fax service provides technical articles,  
diagrams, and troubleshooting instructions on 3Com products 24 hours a  
day, 7 days a week.  
3Com Facts  
Automated Fax  
Service  
Call 3Com Facts using your Touch-Tone telephone:  
1 408 727 7021  
Support from Your  
Network Supplier  
If you require additional assistance, contact your network supplier. Many  
suppliers are authorized 3Com service partners who are qualified to  
provide a variety of services, including network planning, installation,  
hardware maintenance, application training, and support services.  
When you contact your network supplier for assistance, have the  
following information ready:  
Product model name, part number, and serial number  
A list of system hardware and software, including revision levels  
Diagnostic error messages  
Details about recent configuration changes, if applicable  
If you are unable to contact your network supplier, see the following  
section on how to contact 3Com.  
Support from 3Com  
If you are unable to obtain assistance from the 3Com online technical  
resources or from your network supplier, 3Com offers technical telephone  
support services. To find out more about your support options, call the  
3Com technical telephone support phone number at the location nearest  
you.  
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46  
APPENDIX D: TECHNICAL SUPPORT  
When you contact 3Com for assistance, have the following information  
ready:  
Product model name, part number, and serial number  
A list of system hardware and software, including revision levels  
Diagnostic error messages  
Details about recent configuration changes, if applicable  
Here is a list of worldwide technical telephone support numbers:  
Country  
Telephone Number  
Country  
Telephone Number  
Asia, Pacific Rim  
Australia  
Hong Kong  
India  
Indonesia  
Japan  
Malaysia  
New Zealand  
Pakistan  
Philippines  
1 800 678 515  
800 933 486  
P.R. of China  
10800 61 00137 or  
021 6350 1590  
800 6161 463  
+61 2 9937 5085  
001 800 61 009  
0031 61 6439  
1800 801 777  
0800 446 398  
+61 2 9937 5085  
1235 61 266 2602  
Singapore  
S. Korea  
From anywhere in S. Korea: 00798 611 2230  
From Seoul:  
Taiwan, R.O.C.  
Thailand  
(0)2 3455 6455  
0080 611 261  
001 800 611 2000  
Europe  
From anywhere in Europe, call: +31 (0)30 6029900 phone  
+31 (0)30 6029999 fax  
Europe, South Africa, and Middle East  
From the following countries, you may use the toll-free numbers:  
Austria  
Belgium  
Denmark  
Finland  
France  
Germany  
Hungary  
Ireland  
Israel  
0800 297468  
0800 71429  
800 17309  
0800 113153  
0800 917959  
0800 1821502  
00800 12813  
1800 553117  
1800 9453794  
1678 79489  
Netherlands  
Norway  
Poland  
Portugal  
South Africa  
Spain  
Sweden  
Switzerland  
U.K.  
0800 0227788  
800 11376  
00800 3111206  
0800 831416  
0800 995014  
900 983125  
020 795482  
0800 55 3072  
0800 966197  
Italy  
Latin America  
Argentina  
Brazil  
Chile  
Colombia  
AT&T +800 666 5065  
0800 13 3266  
1230 020 0645  
98012 2127  
Mexico  
Peru  
Puerto Rico  
Venezuela  
01 800 CARE (01 800 2273)  
AT&T +800 666 5065  
800 666 5065  
AT&T +800 666 5065  
North America  
1 800 NET 3Com  
(1 800 638 3266)  
Enterprise Customers:  
1 800 876-3266  
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Returning Products for Repair  
47  
Returning Products  
for Repair  
Before you send a product directly to 3Com for repair, you must first  
obtain an authorization number. Products sent to 3Com without  
authorization numbers will be returned to the sender unopened, at the  
senders expense.  
To obtain an authorization number, call or fax:  
Country  
Telephone Number  
+ 65 543 6500  
Fax Number  
Asia, Pacific Rim  
+ 65 543 6348  
+ 31 30 6029999  
Europe, South Africa, and  
Middle East  
+ 31 30 6029900  
Latin America  
1 408 326 2927  
1 408 326 3355  
From the following countries, you may call the toll-free numbers; select option 2 and  
then option 2:  
Austria  
0800 297468  
0800 71429  
800 17309  
Belgium  
Denmark  
Finland  
France  
Germany  
Hungary  
Ireland  
0800 113153  
0800 917959  
0800 1821502  
00800 12813  
1800553117  
1800 9453794  
1678 79489  
0800 0227788  
800 11376  
00800 3111206  
0800 831416  
0800 995014  
900 983125  
020 795482  
0800 55 3072  
0800 966197  
Israel  
Italy  
Netherlands  
Norway  
Poland  
Portugal  
South Africa  
Spain  
Sweden  
Switzerland  
U.K.  
U.S.A. and Canada  
1 800 NET 3Com  
(1 800 638 3266)  
1 408 326 7120  
(not toll-free)  
Enterprise Customers:  
1 800 876 3266  
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48  
APPENDIX D: TECHNICAL SUPPORT  
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GLOSSARY  
10BASE-T The IEEE specification for 10Mbps Ethernet over Category 3, 4 or 5  
twisted pair cable.  
100BASE-FX The IEEE specification for 100Mbps Fast Ethernet over fiber-optic cable.  
100BASE-TX The IEEE specification for 100Mbps Fast Ethernet over Category 5  
twisted-pair cable.  
auto-negotiation A feature on twisted pair ports that allows them to advertise their  
capabilities for speed, duplex and flow control. When connected to a  
port that also supports auto-negotiation, the link can automatically  
configure itself to the optimum setup.  
backbone The part of a network used as a primary path for transporting traffic  
between network segments.  
bandwidth The information capacity, measured in bits per second, that a channel  
can transmit. The bandwidth of Ethernet is 10Mbps, the bandwidth of  
Fast Ethernet is 100Mbps.  
baud The signalling rate of a line, that is, the number of transitions (voltage  
or frequency changes) made per second. Also known as line speed.  
bridge A device that interconnects two LANs of a different type to form a  
single logical network that comprises of two network segments.  
Bridges learn which endstations are on which network segment by  
examining the source addresses of packets. They then use this  
information to forward packets based on their destination address. This  
process is known as filtering.  
broadcast A packet sent to all devices on a network.  
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50  
GLOSSARY  
broadcast storm Multiple simultaneous broadcasts that typically absorb all the available  
network bandwidth and can cause a network to fail. Broadcast storms  
can be due to faulty network devices.  
collision A term used to describe two colliding packets in an Ethernet network.  
Collisions are a part of normal Ethernet operation, but a sudden  
prolonged increase in the number of collisions can indicate a problem  
with a device, particularly if it is not accompanied by a general increase  
in traffic.  
CSMA/CD Carrier-sense Multiple Access with Collision Detection. The protocol  
defined in Ethernet and IEEE 802.3 standards in which devices transmit  
only after finding a data channel clear for a period of time. When two  
devices transmit simultaneously, a collision occurs and the colliding  
devices delay their retransmissions for a random length of time.  
endstation A computer, printer or server that is connected to a network.  
Ethernet A LAN specification developed jointly by Xerox, Intel and Digital  
Equipment Corporation. Ethernet networks use CSMA/CD to transmit  
packets at a rate of 10Mbps over a variety of cables.  
MAC address.  
Ethernet address See  
Fast Ethernet An Ethernet system that is designed to operate at 100Mbps.  
forwarding The process of sending a packet toward its destination using a  
networking device.  
filtering The process of screening a packet for certain characteristics, such as  
source address, destination address, or protocol. Filtering is used to  
determine whether traffic is to be forwarded, and can also prevent  
unauthorized access to a network or network devices.  
flow control A congestion control mechanism. Congestion is caused by devices  
sending traffic to already overloaded port on a Switch. Flow control  
prevents packet loss and inhibits devices from generating more traffic  
until the period of congestion ends.  
full duplex A system that allows packets to be transmitted and received at the  
same time and, in effect, doubles the potential throughput of a link.  
half duplex A system that allows packets to transmitted and received, but not at  
the same time. Contrast with full duplex.  
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GLOSSARY  
51  
hub A device that regenerates LAN traffic so that the transmission distance  
of that signal can be extended. Hubs are similar to repeaters, in that  
they connect LANs of the same type; however they connect more LANs  
than a repeater and are generally more sophisticated.  
IEEE Institute of Electrical and Electronics Engineers. This American  
organization was founded in 1963 and sets standards for computers  
and communications.  
IEEE 802.1D A standard that defines the behavior of bridges in an Ethernet network.  
IETF Internet Engineering Task Force. An organization responsible for  
providing engineering solutions for TCP/IP networks. In the network  
management area, this group is responsible for the development of the  
SNMP protocol.  
IP Internet Protocol. IP is a layer 3 network protocol that is the standard  
for sending data through a network. IP is part of the TCP/IP set of  
protocols that describe the routing of packets to addressed devices.  
IPX Internetwork Packet Exchange. IPX is a layer 3 and 4 network protocol  
designed for networks that use Novell® Netware®.  
IP address Internet Protocol address. A unique identifier for a device attached to a  
network using TCP/IP. The address is written as four octets separated  
with periods (full-stops), and is made up of a network section, an  
optional subnet section and a host section.  
LAN Local Area Network. A network of endstations (such as PCs, printers,  
servers) and network devices (hubs and switches) that cover a relatively  
small geographic area (usually not larger than a floor or building). LANs  
are characterized by high transmission speeds over short distances (up  
to 1000m).  
baud.  
line speed See  
loop An event that occurs when two network devices are connected by  
more than one path, thereby causing packets to repeatedly cycle  
around the network and not reach their destination.  
MAC Media Access Control. A protocol specified by the IEEE for determining  
which devices have access to a network at any one time.  
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52  
GLOSSARY  
MAC address Media Access Control address; also called hardware or physical address.  
A layer 2 address associated with a particular network device. Most  
devices that connect to a LAN have a MAC address assigned to them  
as they are used to identify other devices in a network. MAC addresses  
are 6 bytes long.  
MDI Medium Dependent Interface. An Ethernet port connection where the  
transmitter of one device is connected to the receiver of another  
device.  
MDI-X Medium Dependent Interface Cross-over. An Ethernet port connection  
where the internal transmit and receive lines are crossed.  
multicast A packet sent to a specific group of endstations on a network.  
NIC Network Interface Card. A circuit board installed in an endstation that  
allows it to be connected to a network.  
POST Power On Self Test. An internal test that a Switch carries out when it is  
powered-up.  
protocol A set of rules for communication between devices on a network. The  
rules dictate format, timing, sequencing and error control.  
repeater A simple device that regenerates LAN traffic so that the transmission  
distance of that signal can be extended. Repeaters are used to connect  
two LANs of the same network type.  
router A device that provides WAN links between geographically separate  
networks.  
RPS Redundant Power System. A device that provides a backup source of  
power when connected to a Switch.  
segment A section of a LAN that is connected to the rest of the network using a  
switch or bridge.  
server A computer in a network that is shared by multiple endstations. Servers  
provide endstations with access to shared network services such as  
computer files and printer queues.  
SLIP Serial Line Internet Protocol. A protocol that allows IP to run over a  
serial line (console port) connection.  
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GLOSSARY  
53  
SNMP Simple Network Management Protocol. The current IETF standard  
protocol for managing devices on an TCP/IP network.  
stack A group of network devices that are integrated to form a single logical  
device.  
switch A device that interconnects several LANs to form a single logical LAN  
that comprises of several LAN segments. Switches are similar to  
bridges, in that they connect LANs of a different type; however they  
connect more LANs than a bridge and are generally more sophisticated.  
Switch Database A database that is stored by a switch to determine if a packet should  
be forwarded, and which port should forward the packet if it is to be  
forwarded.  
TCP/IP Transmission Control Protocol/Internet Protocol. This is the name for  
two of the most well-known protocols developed for the  
interconnection of networks. Originally a UNIX standard, TCP/IP is now  
supported on almost all platforms, and is the protocol of the Internet.  
TCP relates to the content of the data travelling through a network —  
ensuring that the information sent arrives in one piece when it reaches  
its destination. IP relates to the address of the endstation to which data  
is being sent, as well as the address of the destination network.  
Telnet A TCP/IP application protocol that provides a virtual terminal service,  
letting a user log into another computer system and access a device as  
if the user were connected directly to the device.  
TFTP Trivial File Transfer Protocol. Allows you to transfer files (such as  
software upgrades) from a remote device using the local management  
capabilities of the Switch.  
unicast A packet sent to a single endstation on a network.  
WAN Wide Area Network. A communications network that covers a wide  
area. A WAN can cover a large geographic area, and may contain  
several LANs within it.  
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54  
GLOSSARY  
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G
Numbers  
glossary 49  
10BASE-T/100BASE-TX ports 13  
3C number 15  
H
3Com bulletin board service (3Com BBS) 44  
3Com URL 43  
3ComFacts 45  
I
A
L
B
LEDs 14  
bulletin board service 44  
M
C
cable  
MAC address of the Switch 15  
management software 32  
managing the Switch 32  
Matrix Module slot 16  
matrix port 16  
choosing the correct 30  
Matrix 16  
console port 15  
conventions  
MDI configuration 30  
MIBs 44  
notice icons, About This Guide  
8
N
E
Ethernet address of the Switch 15  
Expansion Module slot 16  
O
F
online technical services 43  
Fast Ethernet configuration rules 20  
fax service (3ComFacts) 45  
full duplex configuration rules 21  
P
pin assignments  
modem cable 40  
null modem cable 39  
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56  
rear view 15  
RPS socket 15  
pin-outs 39  
ports  
10BASE-T 13  
serial number 15  
size 41  
product name 15  
T
technical support  
R
3Com Knowledgebase Web Services 43  
3Com URL 43  
network suppliers 45  
product repair 47  
RPS 15  
topology rules for Fast Ethernet 20  
Transceiver Module slot 16  
S
U
unit information label 15  
URL 43  
segment, maximum length 13, 21  
socket  
W
World Wide Web (WWW) 43  
Y
Switch 1100  
Year 2000 compliance 42  
desktop configuration 19  
dimensions 41  
Ethernet address 15  
features 12  
installation 23, 24  
MAC address 15  
power socket 15  
powering-up 29  
product name 15  
rack mounting 24  
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3Com Corporation LIMITED WARRANTY  
®
SUPERSTACK II SWITCH 1100  
HARDWARE  
3Com warrants this hardware product to be free from defects in workmanship and materials, under normal  
use and service, for the following length of time from the date of purchase from 3Com or its authorized  
reseller:  
Lifetime,  
except that the Fan and Power Supply hardware (if any) are warranted for five (5) years  
3Com’s sole obligation under this express warranty shall be, at 3Com’s option and expense, to repair the  
defective product or part, deliver to Customer an equivalent product or part to replace the defective item, or  
if neither of the two foregoing options is reasonably available, 3Com may, in its sole discretion, 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. 3Com warrants any replaced or  
repaired product or part for ninety (90) days from shipment, or the remainder of the initial warranty period,  
whichever is longer.  
Advance Replacement is provided for five (5) years, after which time it may be available for a specified fee.  
3Com will ship the replacement product not later than five (5) business days after receiving the request for  
advance replacement, BUT MAY BE DELAYED DUE TO EXPORT OR IMPORT PROCEDURES. When an advance  
replacement is provided and Customer fails to return the original product to 3Com within fifteen (15) days  
after shipment of the replacement, 3Com will charge Customer for the replacement, at list price.  
SOFTWARE  
3Com warrants that each software program licensed from it will perform in substantial conformance to its  
program specifications, 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. 3Com's sole obligation under this express warranty shall be, at 3Com's  
option and expense, to refund the purchase price paid by Customer for any defective software product, 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  
meet Customer’s requirements or 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 non-compatibility is caused by a "bug" or defect in the third party's  
product or from use of the software product not in accordance with 3Com’s published specifications or user  
manual.  
YEAR 2000 WARRANTY  
In addition to the Hardware Warranty and Software Warranty stated above, 3Com warrants that each  
product sold or licensed to Customer on and after January 1, 1998 that is date sensitive will continue  
performing properly with regard to such date data on and after January 1, 2000, provided that all other  
products used by Customer in connection or combination with the 3Com product, including hardware,  
software, and firmware, accurately exchange date data with the 3Com product, with the exception of those  
standard. If it appears that any product that is stated to meet this standard does not perform properly with  
regard to such date data on and after January 1, 2000, and Customer notifies 3Com before the later of April  
1, 2000, or ninety (90) days after purchase of the product from 3Com or its authorized reseller, 3Com shall,  
at its option and expense, provide a software update which would effect the proper performance of such  
product, repair such product, deliver to Customer an equivalent product to replace such product, or if none  
of the foregoing is feasible, refund to Customer the purchase price paid for such product.  
Any software update or replaced or repaired product will carry a Year 2000 Warranty for ninety (90) days  
after purchase or until April 1, 2000, whichever is later.  
OBTAINING WARRANTY  
SERVICE  
Customer must contact a 3Com Corporate Service Center or an Authorized 3Com Service Center within the  
applicable warranty period to obtain warranty service authorization. Dated proof of purchase from 3Com or  
its authorized reseller may be required. Products returned to 3Com's Corporate Service Center must be  
pre-authorized by 3Com with a Return Material Authorization (RMA) number marked on the outside of the  
package, and sent prepaid and packaged appropriately for safe shipment, and it is recommended that they  
be insured or sent by a method that provides for tracking of the package. The repaired or replaced item will  
be shipped to Customer, at 3Com's expense, not later than thirty (30) days after 3Com receives the defective  
product.  
Dead- or Defective-on-Arrival. In the event a product completely fails to function or exhibits a defect in  
materials or workmanship within the first forty-eight (48) hours of installation but no later than thirty (30)  
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days after the date of purchase, and this is verified by 3Com, it will be considered dead- or  
defective-on-arrival (DOA) and a replacement shall be provided by advance replacement. The replacement  
product will normally be shipped not later than three (3) business days after 3Com’s verification of the DOA  
product, but may be delayed due to export or import procedures. When an advance replacement is provided  
and Customer fails to return the original product to 3Com within fifteen (15) days after shipment of the  
replacement, 3Com will charge Customer for the replacement product, at list price.  
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.  
ADDITIONAL SERVICES:  
Telephone Support. This SuperStack II® product comes with telephone technical support for ninety (90) days.  
The ninety (90) day period begins on the date of Customer's product purchase.  
The telephone technical support is available from 3Com from 9 a.m. to 5 p.m., local time, Monday through  
Friday, excluding local holidays. Telephone technical support is limited to the 3Com products designated  
above and may include assistance with installation, product specific configuration, and identification of  
equipment problems. Please refer to the Technical Support appendix in the User Guide for telephone  
numbers.  
Response to requests for telephone technical support will be in the form of a return call from a 3Com  
representative by close of business the following business day.  
To qualify for this 90 days of telephone technical support, you must register on the 3Com Web site at  
number. 3Com reserves the right to modify or cancel this telephone support offering at any time, without  
advance notice. This offer is not available where prohibited or restricted by law.  
WARRANTIES EXCLUSIVE  
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 3COM'S OPTION. 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,  
SATISFACTORY QUALITY, CORRESPONDENCE WITH DESCRIPTION, AND NON-INFRINGEMENT, ALL OF  
WHICH ARE EXPRESSLY DISCLAIMED. 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.  
3COM SHALL NOT BE LIABLE UNDER THIS WARRANTY IF ITS TESTING AND EXAMINATION DISCLOSE THAT  
THE ALLEGED DEFECT OR MALFUNCTION 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 OPEN, REPAIR OR MODIFY THE PRODUCT, OR ANY OTHER CAUSE BEYOND  
THE RANGE OF THE INTENDED USE, OR BY ACCIDENT, FIRE, LIGHTNING, OTHER HAZARDS, OR ACTS OF  
GOD.  
LIMITATION OF LIABILITY  
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 3COM'S OPTION. THIS DISCLAIMER OF LIABILITY FOR DAMAGES WILL NOT BE  
AFFECTED IF ANY REMEDY PROVIDED HEREIN SHALL FAIL OF ITS ESSENTIAL PURPOSE.  
DISCLAIMER  
Some countries, states, or provinces do not allow the exclusion or limitation of implied warranties or the  
limitation of incidental or consequential damages for certain products supplied to consumers, or the  
limitation of liability for personal injury, so the above limitations and exclusions may be limited in their  
application to you. When the implied warranties are not allowed to be excluded in their entirety, they will be  
limited to the duration of the applicable written warranty. This warranty gives you specific legal rights which  
may vary depending on local law.  
GOVERNING LAW  
This Limited Warranty shall be governed by the laws of the State of California, U.S.A. excluding its conflicts of  
laws principles and excluding the United Nations Convention on Contracts for the International Sale of  
Goods.  
3Com Corporation  
5400 Bayfront Plaza  
Santa Clara, CA 95054  
(408) 326-5000  
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EMC STATEMENTS  
FCC STATEMENT  
This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to  
part 15 of the FCC rules. These limits are designed to provide reasonable protection against harmful  
interference when the equipment is operated in a commercial environment. This equipment generates, uses  
and can radiate radio frequency energy and, if not installed and used in accordance with the instructions,  
may cause harmful interference to radio communications. Operation of this equipment in a residential area is  
likely to cause harmful interference to radio communications, in which case the user will be required to  
correct the interference at their own expense.  
CSA STATEMENT  
VCCI STATEMENT  
This Class A digital apparatus meets all requirements of the Canadian Interference-Causing Equipment  
Regulations.  
Cet appareil numérique de la classe A respecte toutes les exigences du Règlement sur le matériel brouilleur  
du Canada.  
BCIQ STATEMENT  
INFORMATION TO THE USER  
If this equipment does cause interference to radio or television reception, which can be determined by  
turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of  
the following measures:  
Reorient the receiving antenna.  
Relocate the equipment with respect to the receiver.  
Move the equipment away from the receiver.  
Plug the equipment into a different outlet so that equipment and receiver are on different branch circuits.  
If necessary, the user should consult the dealer or an experienced radio/television technician for additional  
suggestions. The user may find the following booklet prepared by the Federal Communications Commission  
helpful:  
How to Identify and Resolve Radio-TV Interference Problems  
This booklet is available from the U.S. Government Printing Office, Washington, DC 20402, Stock No.  
004-000-00345-4.  
In order to meet FCC emissions limits, this equipment must be used only with cables which comply with IEEE  
802.3.  
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