Cabletron Systems Switch ELS100 User Manual

SmartSTACK 100  
ELS100-24TX  
ETHERNET SWITCH  
INSTALLATION  
AND  
USER GUIDE  
Download from Www.Somanuals.com. All Manuals Search And Download.  
DOC NOTICE  
This digital apparatus does not exceed the Class A limits for radio noise emissions from dig-  
ital apparatus set out in the Radio Interference Regulations of the Canadian Department of  
Communications.  
Le présent appareil numérique n’émet pas de bruits radioélectriques dépassant les limites  
applicables aux appareils numériques de la class A prescrites dans le Règlement sur le  
brouillage radioélectrique édicté par le ministère des Communications du Canada.  
VCCI NOTICE  
This is a Class A product based on the standard of the Voluntary Control Council for Interfer-  
ence by Information Technology Equipment (VCCI). If this equipment is used in a domestic  
environment, radio disturbance may arise. When such trouble occurs, the user may be  
required to take corrective actions.  
CABLETRON SYSTEMS, INC.  
PROGRAM LICENSE AGREEMENT  
Before utilizing this product, carefully read this License Agreement.  
IMPORTANT:  
This document is an agreement between you, the end user, and Cabletron Systems, Inc.  
(“Cabletron”) that sets forth your rights and obligations with respect to the Cabletron software  
program (the “Program”) contained in this package. The Program may be contained in firm-  
ware, chips or other media. BY UTILIZING THE ENCLOSED PRODUCT, YOU ARE AGREE-  
ING TO BECOME BOUND BY THE TERMS OF THIS AGREEMENT, WHICH INCLUDES  
THE LICENSE AND THE LIMITATION OF WARRANTY AND DISCLAIMER OF LIABILITY.  
IF YOU DO NOT AGREE TO THE TERMS OF THIS AGREEMENT, PROMPTLY RETURN  
THE UNUSED PRODUCT TO THE PLACE OF PURCHASE FOR A FULL REFUND.  
CABLETRON SOFTWARE PROGRAM LICENSE  
1. LICENSE. You have the right to use only the one (1) copy of the Program provided in  
this package subject to the terms and conditions of this License Agreement.  
You may not copy, reproduce or transmit any part of the Program except as permitted  
by the Copyright Act of the United States or as authorized in writing by Cabletron.  
2. OTHER RESTRICTIONS. You may not reverse engineer, decompile, or disassemble  
the Program.  
3. APPLICABLE LAW. This License Agreement shall be interpreted and governed under  
the laws and in the state and federal courts of New Hampshire. You accept the personal  
jurisdiction and venue of the New Hampshire courts.  
Download from Www.Somanuals.com. All Manuals Search And Download.  
EXCLUSION OF WARRANTY  
AND DISCLAIMER OF LIABILITY  
1. EXCLUSION OF WARRANTY. Except as may be specifically provided by Cabletron in  
writing, Cabletron makes no warranty, expressed or implied, concerning the Program  
(including its documentation and media).  
CABLETRON DISCLAIMS ALL WARRANTIES, OTHER THAN THOSE SUPPLIED TO  
YOU BY CABLETRON IN WRITING, EITHER EXPRESSED OR IMPLIED, INCLUDING  
BUT NOT LIMITED TO IMPLIED WARRANTIES OF MERCHANTABILITY AND FIT-  
NESS FOR A PARTICULAR PURPOSE, WITH RESPECT TO THE PROGRAM, THE  
ACCOMPANYING WRITTEN MATERIALS, AND ANY ACCOMPANYING HARD-  
WARE.  
2. NO LIABILITY FOR CONSEQUENTIAL DAMAGES. IN NO EVENT SHALL  
CABLETRON OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER  
(INCLUDING, WITHOUT LIMITATION, DAMAGES FOR LOSS OF BUSINESS, PROF-  
ITS, BUSINESS INTERRUPTION, LOSS OF BUSINESS INFORMATION, SPECIAL,  
INCIDENTAL, CONSEQUENTIAL, OR RELIANCE DAMAGES, OR OTHER LOSS)  
ARISING OUT OF THE USE OR INABILITY TO USE THIS CABLETRON PRODUCT,  
EVEN IF CABLETRON HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAM-  
AGES. BECAUSE SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITA-  
TION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES, OR ON  
THE DURATION OR LIMITATION OF IMPLIED WARRANTIES, IN SOME INSTANCES  
THE ABOVE LIMITATIONS AND EXCLUSIONS MAY NOT APPLY TO YOU.  
UNITED STATES GOVERNMENT RESTRICTED RIGHTS  
The enclosed product (a) was developed solely at private expense; (b) contains “restricted  
computer software” submitted with restricted rights in accordance with Section 52227-19 (a)  
through (d) of the Commercial Computer Software - Restricted Rights Clause and its succes-  
sors, and (c) in all respects is proprietary data belonging to Cabletron and/or its suppliers.  
For Department of Defense units, the product is licensed with “Restricted Rights” as defined  
in the DoD Supplement to the Federal Acquisition Regulations, Section 52.227-7013 (c) (1)  
(ii) and its successors, and use, duplication, disclosure by the Government is subject to  
restrictions as set forth in subparagraph (c) (1) (ii) of the Rights in Technical Data and Com-  
puter Software clause at 252.227-7013. Cabletron Systems, Inc., 35 Industrial Way, Roches-  
ter, New Hampshire 03867-0505.  
SAFETY INFORMATION  
LASER RADIATION AND CONNECTORS  
When the connector is in place, all laser radiation remains within the fiber. The maximum  
amount of radiant power exiting the fiber (  
) is -12.6 dBm or 55 x 10 -6  
under normal conditions  
watts. Removing the optical connector from the transceiver allows laser radiation to emit  
directly from the optical port. The maximum radiance from the optical port (under worst case  
conditions) is 0.8 W cm -2 or 8 x 10 3 W m 2 sr-1.  
Do not use optical instruments to view the laser output. The use of optical instruments  
to view laser output increases eye hazard. When viewing the output optical port, power  
must be removed from the network adapter.  
Download from Www.Somanuals.com. All Manuals Search And Download.  
DECLARATION OF CONFORMITY  
Application of Council Directive(s):  
89/336/EEC  
73/23/EEC  
Manufacturer’s Name:  
Cabletron Systems, Inc.  
Manufacturer’s Address:  
35 Industrial Way  
PO Box 5005  
Rochester, NH 03867  
European Representative Name:  
European Representative Address:  
Mr. J. Solari  
Cabletron Systems Limited  
Nexus House, Newbury Business Park  
London Road, Newbury  
Berkshire RG13 2PZ, England  
Conformance to Directive(s)/  
Product Standards:  
EC Directive 89/336/EEC  
EC Directive 73/23/EEC  
EN 55022  
EN 50082-1  
EN 60950  
Equipment Type/Environment:  
Networking Equipment, for use in a Com-  
mercial or Light Industrial Environment.  
We the undersigned, hereby declare, under our sole responsibility, that the equip-  
ment packaged with this notice conforms to the above directives.  
Manufacturer  
Legal Representative in Europe  
Mr. J. Solari  
Mr. Ronald Fotino  
Full Name  
Full Name  
Principal Compliance Engineer  
Title  
Managing Director - E.M.E.A.  
Title  
Rochester, NH, USA  
Location  
Newbury, Berkshire, England  
Location  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Download from Www.Somanuals.com. All Manuals Search And Download.  
TABLE OF CONTENTS  
PREFACE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Preface i  
Purpose. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .i  
Audience . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .i  
Conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .i  
Message Formats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .i  
Keyboard Entries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ii  
Other Conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ii  
Organization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iii  
Getting Help . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .iv  
1. PRODUCT OVERVIEW. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1  
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1  
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1  
Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3  
Rear Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5  
Feature Summaries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6  
IEEE 802.1D Bridge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6  
Spanning Tree Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6  
Frame Buffering and Frame Latency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6  
Software Download. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7  
Non-volatile Parameter Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7  
Configuration and Management Interfaces. . . . . . . . . . . . . . . . . . . . . . . . . . 7  
RMON. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8  
Port Mirroring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8  
Auto-negotiation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8  
Broadcast Throttling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9  
BootP/DHCP. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9  
LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9  
Full Duplex Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9  
Flow Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10  
Virtual LANs (VLANs) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10  
Class of Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10  
Application Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10  
Client/Server Network Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11  
Local Backbone Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12  
2. INSTALLATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13  
Inspecting Your Shipment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13  
Site Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13  
Mounting the Switch on a Table or Shelf . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14  
Mounting the Switch on a Wall . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15  
Mounting the Switch in a Rack . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16  
Connecting a Terminal to the Console Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17  
Powering the Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18  
Power-Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18  
Connecting Network Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20  
RJ-45 Connector. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20  
10Base-T/100Base-TX Ports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20  
9032579-03  
Table of Contents i  
Download from Www.Somanuals.com. All Manuals Search And Download.  
3. ELS100-24TX USER INTERFACE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21  
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21  
User Access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22  
Factory Defaults . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23  
Menu Hierarchy. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24  
Main Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25  
System Configuration Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26  
SNMP Configuration Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27  
Switch Configuration Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28  
Forwarding Table Configuration Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29  
Spanning Tree Configuration Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31  
Spanning Tree Port Configuration Menu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33  
Spanning Tree Port #n Configuration Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34  
VLAN Configuration Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35  
VLAN Menu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36  
VLAN #n Configuration Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37  
VLAN Port Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38  
Class of Service Configuration Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39  
Port Priority Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40  
Port Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41  
Port Configuration Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42  
Switch Statistics Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43  
Switch Summary Screen. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44  
Port Statistics Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45  
General Information Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47  
Download Software Menu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48  
Save Current Configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49  
Return to Default Configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49  
Logout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49  
Reset. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50  
4. CONFIGURING & MONITORING THE SWITCH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51  
Common Tasks. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51  
Setting Password Protection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52  
Assigning an IP Address. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52  
Checking Network Configuration Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53  
Connecting via Telnet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53  
Setting SNMP Management Access. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53  
Viewing Switch Statistics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54  
Configuring Port Mirroring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54  
Downloading a Software Upgrade . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55  
Downloading Via the Serial Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55  
Downloading Via TFTP. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56  
Configuring Spanning Tree Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56  
Configuring VLANs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57  
Configuring Class of Service. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58  
Configuring Port Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58  
Configuring the Forwarding Table. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59  
Configuring Broadcast Throttling. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60  
Setting a Default Gateway . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61  
Configuring BootP/DHCP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61  
ii Table of Contents  
ELS100-24TX  
Download from Www.Somanuals.com. All Manuals Search And Download.  
5. SNMP MANAGEMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63  
The SNMP Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63  
MIB Objects . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64  
RFC 1213 (MIB-II). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64  
RFC 1398 (Ethernet MIB) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65  
RFC 1493 (Bridge MIB) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65  
RFC 1757 (RMON MIB) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65  
Cabletron Proprietary MIB Extensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66  
Compiling MIB Extensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69  
APPENDIX A. TECHNICAL SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71  
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71  
Standards Compliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71  
Certification. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71  
Data Rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71  
Environmental Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71  
Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72  
Physical. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72  
Microprocessor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72  
Memory. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72  
Port Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73  
Console Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73  
10Base-T and 100Base-TX Ports. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73  
MDI/MDI-X Crossover Cable Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74  
Power Cord Set Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75  
General Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75  
Country-Specific Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75  
APPENDIX B. SPANNING TREE CONCEPTS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77  
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77  
Spanning Tree Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77  
Spanning Tree Protocol in a Network . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78  
Spanning Tree Protocol Parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78  
Spanning Tree Protocol Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79  
Communicating Between Bridges. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80  
Selecting a Root Bridge and Designated Bridges. . . . . . . . . . . . . . . . . . . . 80  
Selecting Designated Ports. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80  
Handling Duplicate Paths . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80  
Remapping Network Topology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80  
APPENDIX C. FLOW CONTROL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81  
APPENDIX D. VIRTUAL LANS (VLANS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83  
VLANs and Frame Tagging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83  
ELS100-24TX VLAN Configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84  
VLAN ID . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84  
Ports in VLAN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84  
VLAN Egress Ports. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85  
VLAN Access Ports. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85  
VLAN Hybrid Ports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86  
VLAN Application Example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88  
9032579-03  
Table of Contents iii  
Download from Www.Somanuals.com. All Manuals Search And Download.  
APPENDIX E. CLASS OF SERVICE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89  
APPENDIX F. ACRONYMS & ABBREVIATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91  
INDEX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Index 93  
iv Table of Contents  
ELS100-24TX  
Download from Www.Somanuals.com. All Manuals Search And Download.  
PREFACE  
Purpose  
This guide provides information about the features and applications of the  
ELS100-24TX switch as well as instructions for configuring and  
monitoring the switch.  
Audience  
This guide is intended for Ethernet local area network (LAN)  
administrators and Management Information Systems (MIS) personnel  
with the following background:  
Working knowledge of Ethernet LANs  
Familiarity with Transmission Control Protocol/Internet Protocol  
(TCP/IP) and Simple Network Management Protocol (SNMP)  
Conventions  
This section describes the conventions used in this guide.  
Message Formats  
Two types of messages, identified by icons, appear in the text:  
A note informs you of special circumstances.  
A caution indicates the possibility of equipment damage.  
9032579-03  
Preface i  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Keyboard Entries  
This guide uses the following conventions for keyboard entries:  
When you read “enter,” type the text and press the [Enter] key.  
Example: Enter the Gateway IP address and press the [Enter] key.  
When you read “select,” type the letter associated with the  
parameter.  
Example: Select a from the System Configuration Menu to view the  
SNMP Configuration Menu.  
Other Conventions  
This guide uses the following typographical conventions:  
Initial Caps  
[Enter]  
Menu titles and console menu selections  
Used to designate the Enter or Return key.  
ALL CAPS  
Used to designate fields within the  
console menus.  
(Example: CONNECTION)  
courier font  
Screen messages and user prompts.  
Selection  
Describes a user-configurable user  
interface item.  
Field  
Describes a read-only information item  
ii Preface  
ELS100-24TX  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Organization  
Chapter 1. Product Overview: Describes the features of the switch, front  
and rear panel components and application examples.  
Chapter 2. Installation: Describes the content of your switch shipment,  
lists site requirements, and provides mounting instructions. Instructions  
for making connections and powering up the switch are provided as well.  
Chapter 3. ELS100-24TX User Interface: Describes the user interface  
console menus and lists the factory defaults for system settings. Each of  
the console menus are presented along with a description of the  
selections/fields available within each menu.  
Chapter 4. Configuring and Monitoring the Switch: Describes  
common tasks and associated steps required to configure the switch, and  
covers common switch and network considerations required to ensure  
system integrity.  
Chapter 5. SNMP Management: Describes how the Simple Network  
Management Protocol (SNMP) communication protocol is used to  
manage the switch, and provides a description of industry standard and  
proprietary Managed Information Bases (MIBs) supported by the switch.  
Appendix A. Technical Specifications: Provides a list of standards  
compliance and certifications, power cord requirements, as well as  
physical and operational specifications.  
Appendix B. Spanning Tree Concepts: Describes the operation of the  
Spanning Tree Protocol and how it is used to resolve the problems of  
physical loops in a network.  
Appendix C. Flow Control: Describes how the flow control features are  
used to provide a mechanism for protecting the switch from overload  
conditions and to keep additional traffic off the network.  
Appendix D. Virtual LANs (VLANs): Describes how the switch uses  
VLANs to create isolated network domains, and provides illustrations of  
VLAN switch configurations.  
Appendix E. Class of Service: Describes how the traffic Class of Service  
features can be used to assign mission-critical data a higher priority  
through the switch by delaying less critical traffic during periods of  
congestion.  
Appendix F. Acronyms and Abbreviations: Provides definitions for a  
list of common acronyms and abbreviations used within the user guide  
and the networking industry.  
9032579-03  
Preface iii  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Getting Help  
If you need additional support for this device, or if you have any questions,  
comments, or suggestions concerning this manual, contact the Cabletron  
Systems Global Call Center:  
Phone  
(603) 332-9400  
Internet mail  
FTP  
ctron.com (134.141.197.25)  
Login  
Password  
anonymous  
your email address  
BBS  
(603) 335-3358  
Modem setting  
8N1: 8 data bits, No parity, 1 stop bit  
For additional information about Cabletron Systems or its products,  
visit the World Wide Web site: http:www.cabletron.com/  
Before calling the Cabletron Systems Global Call Center, be prepared to  
provide the following information:  
Your Cabletron Systems service contract number  
A description of the failure  
A description of any action(s) already taken to resolve the problem  
(e.g., changing mode switches, rebooting the unit, etc.)  
The serial and revision numbers of all involved Cabletron Systems  
products in the network  
A description of your network environment (layout, cable type, etc.)  
Network load and frame size at the time of the trouble (if known)  
The device history (i.e., have you returned the device before, is this  
a recurring problem, etc.)  
Any previous Return Material Authorization (RMA) numbers  
iv Preface  
ELS100-24TX  
Download from Www.Somanuals.com. All Manuals Search And Download.  
1. PRODUCT OVERVIEW  
Description  
This installation and user guide describes the Cabletron Systems  
ELS100-24TX Ethernet switch. This unit is IEEE 802.1D-compliant and  
supports 24 IEEE 802.3u 100Base-TX Fast Ethernet ports. Each port can  
alternatively operate as an IEEE 802.3i 10Base-T port.  
The Cabletron Systems ELS100-24TX switch automatically learns end-  
station addresses from the network and stores them in a Media Access  
Control (MAC) address forwarding table. Incoming packets are then  
forwarded to the appropriate output port based on the addresses in the  
packet. Each port on the switch operates at full Fast Ethernet wire speed  
with full address and frame filtering.  
The Cabletron Systems ELS100-24TX switch contains advanced  
features such as Remote Monitoring (RMON), IEEE 802.1Q virtual LANs  
(VLANs), IEEE 802.1p Class of Service, flow control and broadcast  
throttling. For network management, the ELS100-24TX switch includes a  
standards-compliant Simple Network Management Protocol (SNMP)  
agent. This agent allows network management station applications to  
collect and present status and performance information about a switch as  
well as providing the ability to configure and control functions on the  
device.  
Network management can also be performed in-band using the popular  
TCP/IP application, Telnet. In addition, a serial console port allows out-of-  
band management using a PC or an ASCII terminal. The ELS100-24TX  
switch is desktop or rack-mountable. LEDs on the front panel provide  
information about the operating status of the switch. The back panel of the  
switch contains the power connector and a power switch. Two fans  
maintain ventilation and cooling for internal switch components.  
This chapter provides the following information:  
Product Description  
Features  
Front and Rear Panel Component Descriptions  
Feature Summaries  
Application Examples  
Features  
Ports:  
- 24 dual-speed 10Base-T/100Base-TX RJ-45 connectors  
(MDI-X)  
9032579-03  
Product Overview 1  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Architecture:  
- 8-port 10/100 switch ASIC in a distributed switching  
architecture  
- 4.2 Gbps internal switching fabric  
- Up to 12 MB packet buffering (512 KB/port)  
- 4096 MAC address forwarding table per port; up to 12,288  
addresses per system  
- IEEE 802.3u auto-negotiation for full/half duplex and 10/100  
Mbps speed operation on all ports  
- High performance store-and-forward switching  
Performance:  
- Forwarding: over 3.5 million packets-per-second (64 byte  
packets)  
- Filtering: 3.6 million packets-per-second (64 byte packets)  
Traffic Management:  
- Tag and port-based VLANs per the IEEE 802.1Q draft  
standard - 4094 VLAN IDs recognized per switch  
- Class of Service support per the IEEE 802.1p draft standard  
- Flow control per port: IEEE 802.3x frame-based for full duplex;  
back-pressure for half duplex  
- Broadcast throttling for broadcast storm control  
Network Management:  
- SNMP compliant agent: MIB II (RFC 1213), Bridge MIB (RFC  
1493), Ethernet MIB (RFC 1398), RMON - Statistics, History,  
Alarm and Event groups per port (RFC 1757), private MIB  
extensions  
- Port mirroring for network monitoring and analysis  
- Telnet  
- Console port, RS-232, female DB-9 connector, null modem  
- BootP/DHCP for IP address configuration  
LED Indicators  
- Ethernet ports: Link, Activity, 100Mbps Speed, Full Duplex  
- System: Power, Test  
Software:  
- Extensive diagnostics for product testing and troubleshooting  
- Upgrades using the front panel console port or in-band with  
TFTP  
2 Product Overview  
ELS100-24TX  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Front Panel  
Figure 1-1 shows the front panel of the ELS100-24TX. Table 1-1 defines  
the ELS100-24TX front panel components.  
Figure 1-1. ELS100-24TX Front Panel  
Table 1-1. Front Panel Components  
Function  
Name  
Ports 1-24 LEDs  
Indicates Link, Activity, Speed and Duplex information (see  
Table 1-2 for details).  
10Base-T/100Base-TX  
RJ-45 ports (Ports 1-24)  
RJ-45 connectors numerically identified based on the  
specific product configuration. All ports are wired MDI-X.  
LED mode button  
Button used to switch port LEDs between Link/Activity mode  
and 100M/Full Duplex mode.  
Power LED  
Lights steady green to indicate power is supplied to the  
switch. Off indicates no power is supplied to the switch.  
Test LED  
Lights steady green after a reset and remains on until  
successful completion of power-on self tests. Off indicates a  
successful completion of the power-on self tests.  
Console port  
Female DB-9 connector configured as a null modem connec-  
tion for serial out-of-band management using the console  
menus.  
9032579-03  
Product Overview 3  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Figure 1-2 shows the Link and Activity port LEDs for 24 10Base-T/  
100Base-TX ports (default configuration). Pressing the front panel LED  
mode button changes the operation of these LEDs to 100M Speed and  
Full Duplex, as shown in Figure 1-3.  
The numbers above and below the port LEDs identify the  
LEDs associated with a specific RJ-45 port.  
The port LEDs are grouped to the left of their corresponding RJ-45 ports.  
Table 1-2 defines the performance of the port LEDs for the 10Base-T/  
100Base-TX ports in both the default configuration and with the LED  
mode button pressed.  
1
2
3
4
9
10  
11  
12  
17  
18  
19  
20  
Link  
Activity  
Link  
Link  
Activity  
Link  
Link  
Activity  
Link  
Activity  
Activity  
Activity  
5
6
7
8
13  
14  
15  
16  
21  
22  
23  
24  
Figure 1-2. Port LEDs Default Configuration  
9
10  
11  
12  
17  
18  
19  
20  
1
2
3
4
10/100 speed  
Full/half duplex  
10/100 speed  
10/100 speed  
Full/half duplex  
10/100 speed  
10/100 speed  
Full/half duplex  
10/100 speed  
Full/half duplex  
Full/half duplex  
Full/half duplex  
13  
14  
15  
16  
21  
22  
23  
24  
5
6
7
8
Figure 1-3. Port LEDs LED Mode Button Pressed  
4 Product Overview  
ELS100-24TX  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Table 1-2. Port LEDs Defined  
Name  
Function  
Default  
Configuration  
Link LED On: Indicates a valid connection (link) on the  
associated port.  
Link LED Off: Indicates no link on the associated port.  
Activity LED flashing: Indicates the presence of transmit and/or  
receive activity.  
Activity LED Off: Indicates the absence of transmit or receive  
activity.  
LED mode  
button pressed  
Speed LED On: Indicates the port is in the 100Base-TX mode.  
Speed LED Off: Indicates the port is in the 10Base-T mode.  
Duplex LED On: Indicates the port is in the full duplex mode.  
Duplex LED Off: Indicates the port is in the half duplex mode.  
Rear Panel  
Figure 1-4 shows the ELS100-24TX rear panel and Table 1-3 defines the  
rear panel components.  
Figure 1-4. ELS100-24TX Rear Panel  
Table 1-3. Rear Panel Components  
Function  
Name  
Power Connector  
Power Switch  
Fan Outlets  
Provides AC power to the switch.  
Allows you to turn the switch power on and off.  
Air exit vents through which internal fans discharge air  
for ventilation purposes.  
9032579-03  
Product Overview 5  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Feature Summaries  
The following summaries provide a brief description of ELS100-24TX  
features in areas such as standards compliance, functionality,  
performance, and options.  
IEEE 802.1D Bridge  
The ELS100-24TX switch is fully compliant with IEEE 802.1D transparent  
bridging specifications. An aggregate address table containing 4096  
entries per 8 switch ports is provided for learning, filtering, and forwarding.  
The switch can support up to a maximum of 12,288 addresses.  
Addresses are automatically learned by the switch, and can be  
individually assigned specific forwarding treatment by the network  
administrator if desired. Forwarding table configuration can be made out-  
of-band via the console interface or in-band via SNMP or Telnet. Static  
and dynamic addresses are both stored in this table. One static address  
is assigned per port by default. The Forwarding Table Configuration  
screen in the console menus allows you to assign additional static  
addresses if required.  
Spanning Tree Protocol  
The ELS100-24TX switch supports the IEEE 802.1D Spanning Tree  
Protocol. This protocol allows redundant connections to be created  
between different LAN segments for purposes of fault tolerance. Two or  
more physical paths between different segments can be created through  
the switch, with the Spanning Tree Protocol choosing a single path at any  
given time and disabling all others. If the chosen path fails for any reason,  
a disabled alternative is activated, thereby maintaining the connection.  
This prevents network traffic from circulating in an endless loop formed by  
multiple connections to the same LAN segment.  
Spanning Tree parameters are configurable in the Spanning Tree  
Configuration Menu using the console menus or via SNMP (see Appendix  
B, “Spanning Tree Concepts,” for more information).  
Frame Buffering and Frame Latency  
The ELS100-24TX switch is a store-and-forward switching device. Each  
frame is copied into switch memory before being forwarded to another  
port. This method ensures that all forwarded frames conform to a  
standard Ethernet frame size and have a correct cyclic redundancy check  
(CRC) for data integrity. This switching method prevents bad frames from  
traversing the network and using up valuable network bandwidth, as with  
cut-through switching technology.  
To minimize the possibility of dropping frames on congested ports, the  
ELS100-24TX switch provides 4 MB of dynamically allocated frame  
buffering per 8 ports. This buffer space is used to queue packets for  
transmission on congested networks. This is an additional advantage  
over cut-through switching technology, which drops packets immediately  
when experiencing collisions.  
6 Product Overview  
ELS100-24TX  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Software Download  
The ELS100-24TX switch supports the industry-standard Trivial File  
Transfer Protocol (TFTP) for downloading software to the switch. All  
switch software is stored in a 2 MB sectored flash ROM. The download  
feature allows you to easily install software upgrades to the unit. Software  
can alternatively be downloaded via the serial console port using the  
XMODEM protocol.  
A TFTP or XMODEM software download is invoked via the Download  
Software Menu using the console menus. A TFTP download can also be  
invoked via SNMP.  
Non-volatile Parameter Storage  
Important operating parameters such as IP addresses, Spanning Tree  
configuration, and management security parameters, are stored in non-  
volatile Flash memory. These values are retained when the switch  
experiences power interruptions or is powered down for normal  
maintenance.  
Configuration and Management Interfaces  
The ELS100-24TX switch can be managed using any of the following  
three methods:  
Serial console, out-of-band  
An RS-232 connection, using a DB-9 connector, is supported for out-  
of-band switch management. Serial console management is per-  
formed using a terminal, or computer system running communica-  
tions software. See Chapter 3, “ELS100-24TX User Interface,” for  
more detailed information on managing the ELS100-24TX switch via  
the serial console.  
Telnet, in-band (over Ethernet)  
The switch supports management through a Telnet connection using  
the TCP/IP protocols. Telnet is performed using an ASCII terminal or  
computer system running communications software. See Chapter 3,  
“ELS100-24TX User Interface,” for more detailed information on  
managing the switch via the serial console. Global password protec-  
tion for changing the operating parameters of the switch is provided.  
SNMP-based network manager, in-band  
The switch can be managed using SNMP, the most common protocol  
used today for network management. Standard agent MIBs embed-  
ded in the switch provide basic SNMP management through indus-  
try-standard SNMP applications.  
Management security protection is provided based on SNMP com-  
munity names. See Chapter 5, “SNMP Management,” for more infor-  
mation.  
9032579-03  
Product Overview 7  
Download from Www.Somanuals.com. All Manuals Search And Download.  
RMON  
RMON (Remote Monitoring) is a facility used to manage networks  
remotely while providing multi-vendor interoperability between monitoring  
devices and management stations. RMON is defined by an SNMP MIB.  
This MIB is divided into nine different groups, each gathering specific  
statistical information or performing a specific function. RMON-capable  
devices gather network traffic data and then store them locally until  
downloaded to an SNMP management station.  
The ELS100-24TX supports four of the nine groups of RMON defined for  
Ethernet networks on a per port basis. Specifically, these are:  
Statistics: a function that maintains counts of network traffic statistics  
such as number of packets, broadcasts, collisions, errors, and  
distribution of packet sizes.  
History: a function which collects historical statistics based on user-  
defined sampling intervals. The statistical information collected is the  
same as the Statistics group, except on a time stamped basis.  
Alarm: a function that allows managers to set alarm thresholds based  
on traffic statistics. Alarms trigger other actions through the Event  
group.  
Event: a function that operates with the Alarm group to define an  
action that will be taken when an alarm condition occurs. The event  
may write a log entry and/or send a trap message.  
RMON Statistics group information is displayed on the Port Statistics  
Screen in the console menus. Additional RMON functionality is available  
via SNMP.  
Port Mirroring  
The ELS100-24TX switch includes the ability to mirror the traffic being  
switched on any port for purposes of network traffic analysis and  
connection integrity. When this feature is enabled, a protocol analyzer or  
RMON probe is connected to any port in a group of eight. This port is  
configured to mirror the traffic from any other port in the same group of  
ports. The groupings are ports 1-8, 9-16 and 17-24. You can only mirror  
one port to another port at one time. Port mirroring occurs at the same  
speed configured for the port (10Mbps-to-10Mbps or 100Mbps-to-  
100Mbps). Port mirroring is configurable in the Switch Configuration  
Menu using the console menus or via SNMP.  
Auto-negotiation  
Auto-negotiation is a process that permits the switch to automatically  
select the operational modes of its ports. Upon first being connected, the  
switch detects the speed of the network the port is connected to, either  
10Mbps or 100Mbps, and the type of communication setting, half or full  
duplex. The port is then automatically set by the switch to operate in the  
proper mode, without user intervention. It is not required that the network  
device being connected to the switch supports auto-negotiation as the  
8 Product Overview  
ELS100-24TX  
Download from Www.Somanuals.com. All Manuals Search And Download.  
ELS100-24TX switch automatically adjusts to the network device’s  
communication settings. Auto-negotiation is configurable in the Port  
Configuration Menu of the console menus or via SNMP.  
Broadcast Throttling  
The ELS100-24TX has the capability to throttle (or limit) the flooding of  
packets through the switch. Broadcast, multicast, and unknown  
destination address unicast packets received by the switch are typically  
flooded to all ports on the switch or on a given VLAN. When the number  
of these types of packets being forwarded is large, the performance of the  
switch in forwarding packets of other types may suffer. A programmable  
broadcast cutoff rate parameter allows a rate threshold to be set in the  
switch for the forwarding of broadcast and unknown destination address  
packets. If the cutoff rate is exceeded, further packets of these types are  
dropped. This capability helps to alleviate broadcast storms, a problem  
often encountered in Ethernet networks. Broadcast throttling is  
configurable in the Switch Configuration menu of the console menus or  
via SNMP.  
BootP/DHCP  
The Bootstrap Protocol (BootP) and the Dynamic Host Configuration  
Protocol (DHCP) provide for the capability of passing configuration  
information to hosts on a TCP/IP network. Using this process, network  
devices do not need to be configured before they can communicate using  
the TCP/IP protocol suite. The ELS100-24TX switch uses BootP and  
DHCP to automatically configure IP address information without requiring  
access to the console menus. BootP/DHCP operation is configurable  
using the BootP/DHCP Enable option in the System Configuration Menu  
of the console menus or via SNMP.  
LEDs  
The switch port LEDs provide a quick and accurate display of the integrity  
of switch connections and switch mode. The operation of the port LEDs  
can be changed by use of the LED mode button on the switch front panel.  
The default operation of the LEDs indicates Link (L) and Activity (A) for  
each of the ports. When the LED mode button is pressed (pressed and  
held in), the operation of the LEDs changes to indicate 10/100 Mbps  
speed and full/half duplex operation, respectively.  
Full Duplex Mode  
The full duplex mode of operation on a port can double the throughput of  
switch connections. This mode disables the collision detection portion of  
the Ethernet Carrier Sense Multiple Access with Collision Detection  
(CSMA/CD) protocol, allowing for two-way traffic. Full duplex is  
configurable using the Duplex Mode parameter in the Port Menu of the  
console menus or via SNMP.  
9032579-03  
Product Overview 9  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Flow Control  
Flow control allows you to manage network traffic during congestion  
periods and to prevent the loss of packets when port buffer thresholds are  
exceeded. Flow control also serves to deny access to additional traffic  
that could add to a congestion condition. The ELS100-24TX switch  
supports flow control per the IEEE 802.3x standard. See Appendix C,  
“Flow Control,” for more information on this feature.  
Virtual LANs (VLANs)  
VLANs allow you to connect users to a specific LAN segment regardless  
of their physical location. The ELS100-24TX switch supports tagged  
VLANs per the IEEE 802.1Q draft standard. With frame tagging, a short  
tag is appended to every frame that crosses the network backbone. The  
tag identifies which VLAN the frame belongs to. See Appendix D, “Virtual  
LANs,” for more information.  
Class of Service  
Class of Service support allows you to assign a higher priority to selected  
traffic passing through the switch. The ELS100-24TX switch supports  
Class of Service attributes per the IEEE 802.1p draft standard using a  
priority queuing mechanism. This feature ensures that traffic during  
congestion periods will not interfere with traffic assigned a higher priority.  
Traffic assigned a lower priority is subject to discard when memory is in  
short supply. See Appendix E, “Class of Service,” for more information.  
Application Examples  
The exploding popularity of the Internet and of corporate intranets, as well  
as new, high-bandwidth desktop applications, are driving the demand for  
Fast Ethernet. The increase in multimedia traffic and the need to support  
legacy protocols alongside new, data intensive applications is driving the  
need for network segmentation and traffic prioritization.  
The ELS100-24TX switch is ideal for meeting the needs of today’s high  
performance networks. The switch’s low cost and high port count makes  
it attractive and affordable for dedicated 10/100Mbps connections to the  
desktop. In addition, extensive features, including redundant links, traffic  
Class of Service and VLAN capability, provide the management needed  
for the workgroup and local backbone.  
The following sections illustrate the ELS100-24TX switch employed in  
application examples:  
Client/Server Network  
Local Backbone  
10 Product Overview  
ELS100-24TX  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Client/Server Network Application  
To improve workstation performance in a client/server environment, the  
ELS100-24TX switch can be configured to provide 200 Mbps full duplex  
Fast Ethernet connections to servers by connecting each to a dedicated  
switch port (Figure 1-5). Users can be accommodated through  
connections to hubs, both at 10Mbps and 100Mbps speeds, through  
10Mbps switches with 100Mbps uplinks, or through direct connections.  
Figure 1-5. Client/Server Network Application  
9032579-03  
Product Overview 11  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Local Backbone Application  
The ELS100-24TX switch can be used in a local backbone application,  
connecting network segments together and providing file-server access  
(Figure 1-6). Workgroup hubs are provided with a single connection to the  
switch while servers are put on dedicated 100 Mbps ports. Routers and  
other networking devices can connect off of the switched backbone as  
well.  
Figure 1-6. Local Backbone Application  
12 Product Overview  
ELS100-24TX  
Download from Www.Somanuals.com. All Manuals Search And Download.  
2. INSTALLATION  
Inspecting Your Shipment  
When you receive the shipment of your switch, check the package  
contents and make sure you have the following items:  
ELS100-24TX Ethernet switch  
Mounting ears and mounting screws  
Power cord  
This document  
Site Requirements  
Before you install the switch, make sure the site meets the following  
requirements:  
Mounting  
Provide a flat table, wall or shelf surface, or an optional 19 in. (48.3  
cm) equipment rack.  
Use an EIA standard equipment rack that is grounded and physically  
secure.  
Power source  
Provide a power source within six feet (1.8 m) of the installation loca-  
tion. This source must provide 100 VAC to 240 VAC, and 50 Hz to 60  
Hz power, with a 100 VA minimum. Power specifications for the  
switch are shown in Appendix A, “Technical Specifications.”  
Primary voltage selection within the above ranges is  
automatic and requires no user action.  
Environmental  
Install the ELS100-24TX switch in a dry area, with adequate air cir-  
culation. Avoid placing the switch in direct sunlight or near other heat  
sources, such as hot-air vents. For temperature and humidity speci-  
fications, see Appendix A, “Technical Specifications.”  
Ventilation  
Do not restrict airflow by covering or obstructing air inlets on the side  
of the switch or the rear panel internal air fan exits.  
9032579-03  
Installation 13  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Mounting the Switch on a Table or Shelf  
Mount the switch on a table or shelf in a position which allows access to  
the front panel RJ-45 ports, visibility of the port LEDs, and access to the  
power connector. Make sure that the mounting surface can safely support  
the switch and that there is adequate space around the switch for  
ventilation and cooling.  
14 Installation  
ELS100-24TX  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Mounting the Switch on a Wall  
The switch ships with two (2) multi-position mounting ears and four (4)  
mounting screws.  
The mounting screws are used to attach the mounting ears to  
the switch. Once the ears are attached to the switch, you will  
need to provide appropriate screws to mount the switch to the  
wall.  
Figure 2-1 shows the orientation of the mounting ears for attaching the  
ears to the switch for a wall mount application. Be sure that the wall  
surface can safely support the switch.  
Do the following:  
1. Mount one of the ears to the switch using two (2) of the supplied  
screws. Repeat this step for the other side of the switch.  
2. Mount the switch to the wall using appropriate screws.  
Figure 2-1. Mounting the Switch on a Wall  
9032579-03  
Installation 15  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Mounting the Switch in a Rack  
The switch ships with two (2) multi-position mounting ears and four (4)  
mounting screws.  
The mounting screws are used to attach the mount-  
ing ears to the switch. Once the ears are attached to  
the switch, you will need to provide appropriate  
screws to mount the switch in a rack.  
Figure 2-2 shows the orientation of the mounting ears for attaching the  
ears to the switch for a rack mount application. Mount the switch with the  
front panel facing forward. Do the following:  
1. Mount one of the ears to the switch using two (2) of the supplied  
screws. Repeat this step for the other side of the switch.  
2. Slide the switch into the rack and align the holes in the rack mounting  
ears with the holes in the rack rails.  
3. Insert and tighten appropriate rack-mounting screws (not  
provided  
Figure 2-2. Mounting the Switch in a Rack  
16 Installation  
ELS100-24TX  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Connecting a Terminal to the Console Port  
The console port is a serial RS-232 interface port that enables a  
connection to a terminal for performing switch monitoring and  
configuration functions. The terminal may be a PC or workstation running  
terminal emulation software, or a dumb terminal configured as a Data  
Terminal Equipment (DTE) connection. Alternatively, this port can be  
connected to an external modem to enable remote dial-in management.  
If you connect a terminal to the console port prior to powering the switch,  
you can observe the progress and results of the power-up diagnostics as  
the switch goes through its initialization process.  
The console port connector is configured as a female null modem  
connection using a female DB-9 (see Table A-1 for pinouts). A standard  
straight-through wired RS-232 cable is typically all that is needed to  
connect to this interface. Any cable connected to the console port must  
be shielded to comply with emissions regulations and requirements.  
To connect the ELS100-24TX console port to a terminal, do the following:  
1. Connect a terminal to the console port using an interface cable  
(Figure 2-3).  
Figure 2-3. Connecting a Terminal to the Console Port  
2. Connect the male connector of the interface cable directly to the  
switch console port and tighten the captive retaining screws.  
3. Connect the other end of the interface cable to a terminal (in some  
instances, an adapter may be required to make this connection).  
4. From your terminal, start the terminal emulation program.  
5. Configure the terminal to the following communication settings:  
9600 baud, no parity, 8 data bits, 1 stop bit, No hardware flow control,  
ASCII character set.  
9032579-03  
Installation 17  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Powering the Switch  
To supply power to the switch, do the following:  
1. Connect the power cord to the switch and to a grounded three-prong  
wall outlet (Figure 2-4). See Appendix A, “Power Cord Set  
Requirements,” for more information regarding specific international  
power cord requirements.  
Figure 2-4. Connecting the Power Cord to the Switch  
2. Turn on the power switch.  
The Power LED lights green (see Figure 1-1). If it does not, check to  
make sure that the power cable is plugged in correctly and that the  
power source is good.  
Power-Up  
When you turn the power on, the switch conducts a series of hardware  
and software tests to verify correct operation. If a terminal or computer is  
connected to the console port, the results of the tests are displayed on the  
screen. If you want to display the results of the tests after the switch has  
already been turned on, turn the power switch off and then back on.  
The switch performs two basic types of tests at power-up. During this  
time, the Test LED (see Figure 1-1) lights steady green. These tests are:  
Serial port  
The serial console port test is the first test performed. If the switch  
fails this test, no further tests are performed, and the console displays  
no information.  
Memory  
Memory tests on the CPU RAM are performed after the serial port  
test. No results are displayed on the console.  
18 Installation  
ELS100-24TX  
Download from Www.Somanuals.com. All Manuals Search And Download.  
After these two tests are performed, the operational software of the switch  
is loaded. A series of more extensive diagnostic tests are then conducted  
during which the Test LED remains lit. The results of the tests are  
displayed on the terminal. If all tests pass, the Test LED turns off. When  
all tests are complete, the system is functional and the user interface is  
ready to receive commands at the console.  
9032579-03  
Installation 19  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Connecting Network Cables  
Network cable must comply with the following requirements:  
Category 3 or 5 Unshielded Twisted Pair (UTP) for ports running  
10Base-T  
Category 5 UTP for ports running 100Base-TX  
Maximum length for UTP connections: 100m (328 ft.)  
RJ-45 Connector  
The 10Base-T/100Base-TX ports use RJ-45 connectors. Figure 2-5  
shows an RJ-45 connector being inserted into a port.  
Figure 2-5. Inserting an RJ-45 Connector into a Port  
10Base-T/100Base-TX Ports  
The 10Base-T/100Base-TX ports use RJ-45 connectors for connection to  
10Base-T or 100Base-TX network segments or end-stations. These UTP  
connections meet the requirements of ISO 8877, specified by 10Base-T,  
Section 14 of the IEEE 802.3 specification. The ports are wired with the  
MDI-X function implemented. Workstations or servers can be connected  
to the ELS100-24TX switch using standard straight-through wired cables.  
For connections to hubs or other switches, a crossover cable may be  
necessary (refer to the “MDI/MDI-X Crossover Cable Wiring” section in  
Appendix A). See Table A-2 for 10Base-T/100Base-TX connector pin  
assignments.  
20 Installation  
ELS100-24TX  
Download from Www.Somanuals.com. All Manuals Search And Download.  
3. ELS100-24TX USER INTERFACE  
Overview  
When you have connected a terminal to the console port, or used Telnet  
to access the switch over the network, access is gained to the console  
menus. These menus allow you to reconfigure the switch from its factory  
default settings, as well as to monitor switch status and performance. The  
menus have a layout similar to the sample Main Menu shown in Figure  
3-1. The information is divided into the following parts:  
Menu Identification (includes model number)  
Menu Name (includes access privileges)  
Selectable Items listed by letters  
Screen Prompt for menu selections and entry of field parameters,  
and Message Area for display of next entry option, parameters, or  
error messages.  
Menu ID  
Cabletron Systems ELS100-24TX  
MAIN MENU  
Access Control: READ/WRITE  
Menu name  
a. System Configuration Menu  
b Switch Configuration Menu  
c. Port Menu  
d. Switch Statistics Screen  
e. General Information Screen  
f. Download Software Menu  
g. Save Current Configuration  
h. Return to Default Configuration  
i. Logout  
Selectable  
items  
j. Reset  
Screen prompt  
& message area  
Enter Selection:  
Figure 3-1. Sample Main Menu  
9032579-03  
ELS100-24TX User Interface 21  
Download from Www.Somanuals.com. All Manuals Search And Download.  
User Access  
There are two modes of access to the user interface: READ-ONLY and  
READ/WRITE. READ-ONLY access allows you to view switch infor-  
mation, but not modify any operating parameters. READ/WRITE access  
allows you to both read and modify switch information. You are required  
to login with a password before obtaining READ/WRITE access. If no  
password is entered (press only the [Enter] key), you are logged in with  
READ-ONLY access. No password is configured in the factory default  
settings, allowing full READ/WRITE access until a password is set.  
To use the console menus, do the following:  
1. Type the letter associated with the desired option.  
If the selected item is a submenu title, the submenu is displayed  
when you enter the letter.  
2. Enter the parameter requested by the screen prompt.  
If the selected item is a parameter, the system displays a prompt for the  
entry of a new parameter value. If the value entered is invalid, a beep  
sounds, or a message displays, requesting you to enter a valid value.  
22 ELS100-24TX User Interface  
ELS100-24TX  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Factory Defaults  
Table 3-1 lists the factory default settings for the switch configuration  
parameters. Each of these parameters can be changed via the console  
menus or Telnet.  
Table 3-1. Factory Default Settings  
Parameter  
Default Value  
Active Aging Time  
300  
Yes  
500000  
Yes  
32768  
No  
Auto-negotiation Enable  
Broadcast Cutoff Rate  
BootP/DHCP Enable  
Bridge Priority  
Class of Service Enable  
Class of Service Port Priority  
0
Class of Service Priority Thresh-  
old  
4
Flow Control Enable  
Forward Delay  
Full Duplex  
Hello Time  
No  
15  
Yes  
2
Max Age  
20  
Password  
<none>  
Path Cost  
10 for 100Mbps speed ports  
100 for 10Mbps speed ports  
Port Enable  
Yes  
128  
Port Priority  
Port Speed  
100  
Port Mirroring Enable  
Screen Timeout  
No  
0
SNMP Private Community Name  
SNMP Public Community Name  
Spanning Tree Protocol Enable  
Terminal Baud Rate  
Terminal Hardware Flow Control  
VLAN Enable  
private  
public  
Yes  
9600  
No  
No  
VLAN Port Type  
Access  
9032579-03  
ELS100-24TX User Interface 23  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Menu Hierarchy  
Figure 3-2 shows the ELS100-24TX switch user interface menu  
hierarchy.  
SNMP Private Community Name  
SNMP Public Community Name  
Trap Destination #1-4  
System  
Configuration  
Menu  
SNMP Configuration Menu  
System Name  
System Location  
Community Name #1-4  
System Contact  
IP Address  
Subnet Mask  
Default Gateway  
Display Table  
Make Entry Static  
Add Static Entry  
Delete Static Entry  
Modify Static Entry  
Search by Port#  
BootP/DHCP Enable  
Screen Timeout (minutes)  
Password  
Terminal Baud Rate  
Terminal Hardware Flow Control  
Search by MAC Address  
Switch  
Configuration  
Menu  
Forwarding Table Configuration Menu  
Spanning Tree Configuration Menu  
VLAN Configuration Menu  
Spanning Tree Protocol Enable  
Port Configuration Menu  
Hello Time (seconds)  
Forward Delay (seconds)  
Max Age (seconds)  
Port ID  
Class of Service Configuration Menu  
Forwarding Table Aging Time (seconds)  
Broadcast Cutoff Rate  
Port Name  
Path Cost  
Port Priority  
Port State  
Select Port  
Port Mirroring Enable  
Bridge Priority  
Mirrored Port  
Mirroring Port  
Transmit Data Mirror Enable  
Receive Data Mirror Enable  
VLAN Enable  
VLAN Menu  
VLAN Port Menu  
ID  
ID  
Port Menu  
VLAN Name  
Ports in VLAN  
VLAN Egress Ports  
Configure  
Port Name  
Enable Status  
Link Status  
Auto Negotiated Status  
Full Duplex Status  
Speed (10/100Mbps)  
Flow Control Status  
Configure  
Class of Service Enable  
Priority Threshold  
Configure Port Priority  
Port ID  
Port Name  
Type  
Port Name  
Port Enable  
Switch  
Statistics  
Screen  
Modify Port Type  
ID  
Flow Control Enable  
Auto-negotiation Enable  
Full Duplex  
Transmitted  
Received  
Forwarded  
Filtered  
Port Speed  
Port ID  
Port Name  
Priority Default  
Configure  
Dropped  
Errored  
Switch Summary  
Port Statistics  
Frames Transmitted  
Frames Received  
Frames Forwarded  
Frames Filtered  
Frames Dropped  
Frames Errored  
General  
Information  
Screen  
Software Version  
Serial Number  
Base MAC Address  
Up Time (minutes)  
Power Up Count  
Port #n Statistics  
Download Software Menu  
Frames Transmitted  
Frames Received  
Collisions  
Late Collisions  
Save Current Configuration  
Frames Forwarded  
Frames Filtered  
Frames Dropped  
Broadcasts Transmitted  
Broadcasts Received  
Multicasts Transmitted  
Multicasts Received  
Bytes Transmitted  
CRC/Alignment Errors  
Undersized Frames  
Oversized Frames  
Fragments  
Jabbers  
64 Byte Frames  
65 to 127 Byte Frames  
128 to 255 Byte Frames  
256 to 511 Byte Frames  
512 to 1023 Byte Frames  
1024 to 1518 Byte Frames  
Return to Default Configuration  
Logout  
Reset  
Bytes Received  
Pause Frames Transmitted  
Pause Frames Received  
Figure 3-2. ELS100-24TX User Interface Menu Hierarchy  
24 ELS100-24TX User Interface  
ELS100-24TX  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Main Menu  
The Main Menu is the first screen seen after successfully logging in to the  
system. Figure 3-3 shows the Main Menu and the accompanying table  
describes the Main Menu.  
MAIN MENU  
Access Control: READ/WRITE  
a. System Configuration Menu  
b Switch Configuration Menu  
c. Port Menu  
d. Switch Statistics Screen  
e. General Information Screen  
f. Download Software Menu  
g. Save Current Configuration  
h. Return to Default Configuration  
i. Logout  
j. Reset  
x. Previous Menu  
Enter Selection:  
Figure 3-3. Main Menu  
Selection  
Description  
System Configuration  
Menu  
Contains commands and parameters that reflect the global op-  
eration of the switch.  
Switch Configuration  
Menu  
Provides access to information and parameters affecting the  
functional operation of the switch. You can configure Forward-  
ing Table, Spanning Tree, and virtual LAN (VLAN).  
Port Menu  
Shows the configuration of the individual ports on the switch  
and allows you to modify switch port operation.  
Switch Statistics  
Screen  
Presents switch-level and port-level statistics.  
General Information  
Screen  
Displays the system software version, switch serial number,  
base MAC address, system up time and power-up count.  
Download Software  
Menu  
Contains parameters and commands for initiating a software  
download to upgrade the switch operating software.  
Save Current  
Configuration  
Saves current switch operating parameters to non-volatile  
memory.  
Return to Default  
Configuration  
Restores switch operating parameters to factory defaults. You  
must reset the switch for activate default parameters.  
Logout  
Logs out of the console interface. Once you logout, you must  
enter a password before you can access the console interface  
again.  
Reset  
Performs a software reset of the switch by restarting the system  
software and reloading all operating parameters.  
9032579-03  
ELS100-24TX User Interface 25  
Download from Www.Somanuals.com. All Manuals Search And Download.  
System Configuration Menu  
The System Configuration Menu enables modification of system-level  
switch configuration parameters. Select a from the Main Menu to view the  
System Configuration Menu. Figure 3-4 shows the System Configuration  
Menu and the accompanying table describes the System Configuration  
Menu.  
SYSTEM CONFIGURATION  
Access Control: READ/WRITE  
a. SNMP Configuration Menu  
b System Name  
c. System Location  
d. System Contact  
e. IP Address  
000.000.000.000  
f. Subnet Mask  
000.000.000.000  
g. Default Gateway  
h. BootP/DHCP Enable  
i. Screen Timeout (minutes)  
j. Password  
k. Terminal Baud Rate  
l. Terminal Hardware Flow Control  
000.000.000.000  
Yes  
0
None  
9600  
No  
x. Previous Menu  
Enter Selection:  
Figure 3-4. System Configuration Menu  
Selection  
Description  
SNMP Configuration  
Menu  
Menu for configuring SNMP-related parameters.  
System Name  
System Location  
System Contact  
IP Address  
The switch administrative name (1-36 character range).  
The physical switch location (1-36 character range).  
The switch contact person (1-36 character range).  
The IP address of the switch.  
Subnet Mask  
Subnet mask associated with the switch IP address.  
Default Gateway  
The default gateway (or router) to which the switch sends  
IP packets destined for a different subnet.  
BootP/DHCP Enable  
Allows you to enable (Yes) or disable (No) the BootP and  
DHCP protocols for automatically configuring the switch’s  
IP address information.  
Screen Timeout (minutes)  
The duration of time before a serial console or Telnet ses-  
sion terminates due to user inactivity (0-65535 numeric  
range). A value of “0” means that the screen will not termi-  
nate at any time.  
Password  
Allows “read/write” access to the user interface, via the se-  
rial console or Telnet (1-10 character range).  
Terminal Baud Rate  
Serial console baud rate (2400, 9600 or 19200).  
Terminal Hardware Flow  
Control  
Allows you to enable (Yes) or disable (No) hardware flow  
control on serial console interface. Signals DTR, RTS and  
CTS are used for this purpose. Flow control should be en-  
abled if using external modem.  
26 ELS100-24TX User Interface  
ELS100-24TX  
Download from Www.Somanuals.com. All Manuals Search And Download.  
SNMP Configuration Menu  
The SNMP Configuration Menu allows you to modify SNMP-related  
configuration parameters. Select a from the System Configuration Menu  
to view the SNMP Configuration Menu. Figure 3-5 shows the SNMP  
Configuration Menu and accompanying table describes the SNMP  
Configuration Menu.  
SNMP CONFIGURATION  
Access Control: READ/WRITE  
private  
public  
000.000.000.000  
public  
000.000.000.000  
public  
000.000.000.000  
public  
000.000.000.000  
public  
a. SNMP Private Community Name  
b. SNMP Public Community Name  
c. Trap Destination #1  
d. Community Name #1  
e. Trap Destination #2  
f. Community Name #2  
g. Trap Destination #3  
h. Community Name #3  
i. Trap Destination #4  
j. Community Name #4  
x. Previous Menu  
Enter Selection:  
Figure 3-5. SNMP Configuration Menu  
Description  
Selection  
SNMP Private  
Community Name  
The community name for read/write SNMP access to the  
device (1-10 character range; the default name is: “pri-  
vate”).  
SNMP Public  
Community Name  
The community name for read only SNMP access to the de-  
vice (1-10 character range; the default name is: “public”).  
Trap Destination #1  
Community Name #1  
Trap Destination #2  
Community Name #2  
Trap Destination #3  
Community Name #3  
Trap Destination #4  
Community Name #4  
The IP address of trap destination #1 where SNMP trap  
messages are forwarded.  
The SNMP community name to use for traps forwarded to  
trap destination #1.  
The IP address of trap destination #2 where SNMP trap  
messages are forwarded.  
The SNMP community name to use for traps forwarded to  
trap destination #2.  
The IP address of trap destination #3 where SNMP trap  
messages are forwarded.  
The SNMP community name to use for traps forwarded to  
trap destination #3.  
The IP address of trap destination #4 where SNMP trap  
messages are forwarded.  
The SNMP community name to use for traps forwarded to  
trap destination #4.  
9032579-03  
ELS100-24TX User Interface 27  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Switch Configuration Menu  
The Switch Configuration Menu allows you to modify switching-related  
configuration parameters. Select b from the Main Menu to view the Switch  
Configuration Menu. Figure 3-6 shows the Switch Configuration Menu  
and the accompanying table describes the Switch Configuration Menu.  
SWITCH CONFIGURATION  
Access Control: READ/WRITE  
a. Forwarding Table Configuration Menu  
b. Spanning Tree Configuration Menu  
c. VLAN Configuration Menu  
d. Class of Service Configuration Menu  
e. Forwarding Table Aging Time(seconds) 300  
f. Broadcast Cutoff Rate  
g. Port Mirroring Enable  
h. Mirrored Port  
500000  
No  
2
i. Mirroring Port  
1
j. Transmit Data Mirror Enable  
k. Receive Data Mirror Enable  
Yes  
No  
x. Previous Menu  
Enter Selection:  
Figure 3-6. Switch Configuration Menu  
Description  
Selection  
Forwarding Table  
Menu for configuring the switch forwarding table.  
Configuration Menu  
Spanning Tree  
Configuration Menu  
Menu for configuring the switch Spanning Tree  
operation.  
VLAN Configuration Menu  
Menu for configuring the VLAN operation of the switch.  
Menu for configuring Class of Service for the switch.  
Class of Service  
Configuration Menu  
Forwarding Table Aging Time  
Broadcast Cutoff Rate  
Time in seconds until entries in the filter table are aged  
out if not accessed (10-1,000,000 second range).  
Per second rate past which broadcast and destination  
unknown unicast frames are not flooded on each  
group of 8 ports on the switch (100-500,000 frames per  
second range).  
Port Mirroring Enable  
Allows you to enable (Yes) or disable (No) port  
mirroring.  
Mirrored Port  
The source port for the data to be mirrored.  
The destination port for the data to be mirrored.  
Mirroring Port  
Transmit Data Mirror Enable *  
Allows you to enable (Yes) or disable (No) the  
mirroring of data transmitted out the mirrored port.  
Receive Data Mirror Enable *  
Allows you to enable (Yes) or disable (No) the  
mirroring of data received by the mirrored port.  
*Only one of these options can be enabled at any given time. Changing the setting  
of one of these options automatically changes the setting of the other option.  
28 ELS100-24TX User Interface  
ELS100-24TX  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Forwarding Table Configuration Menu  
The Forwarding Table Configuration Menu allows you to view and modify  
forwarding table parameters. The MAC address of each forwarding table  
entry is displayed along with its type, disposition, and associated port  
number. Select a from the Switch Configuration Menu to view the  
Forwarding Table Configuration Menu. Figure 3-7 shows the Forwarding  
Table Configuration Menu and the accompanying table describes the  
Forwarding Table Configuration Menu.  
FORWARDING TABLE CONFIGURATION  
Access Control: READ/WRITE  
MAC ADDRESS  
TYPE  
DISPOSITION  
PORT ID  
PORT NAME  
---------------------------------------------------------------------------------------------------------------------  
0a0a0a0a0a0a  
0a0a0a0a0a0b  
0a0a0a0a0a0c  
0a0a0a0a0a0d  
0a0a0a0a0a0e  
0a0a0a0a0a0f  
0a0a0a0a0a10  
0a0a0a0a0a11  
DYNAMIC  
DYNAMIC  
DYNAMIC  
DYNAMIC  
DYNAMIC  
DYNAMIC  
DYNAMIC  
DYNAMIC  
FORWARD  
FORWARD  
FORWARD  
FORWARD  
FORWARD  
FORWARD  
FORWARD  
FORWARD  
1
2
3
4
5
6
7
8
n. Next Page  
p. Previous Page  
f. First Page  
l. Last Page  
a. Display Table  
b. Make Entry Static  
c. Add Static Entry d. Delete Static Entry  
e. Modify Static Entry  
s. Search by Port # m. Search by MAC Address x. Previous Menu  
Enter Selection:  
Figure 3-7. Forwarding Table Configuration Menu  
Field  
Description  
MAC Address  
Type  
MAC address for the listed port.  
Displays the type of address entry: system, dynamic or static.  
Disposition  
Displays disposition of the address entry: local, forward or dis-  
card.  
Port ID  
Displays the port number associated with the MAC address  
entry.  
Port Name  
Displays the administrative name assigned to the port.  
continued on next page  
9032579-03  
ELS100-24TX User Interface 29  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Forwarding Table Configuration Menu (continued)  
Selection  
Description  
Next Page  
Displays the next page of the forwarding table.  
Previous Page  
First Page  
Displays the previous page of the forwarding table.  
Displays the first page (top) of the forwarding table.  
Displays the last page of the forwarding table.  
Redisplays the forwarding table.  
Last Page  
Display Table  
Make Entry Static  
Add Static Entry  
Delete Static Entry  
Modify Static Entry  
Search by Port #  
Makes a dynamic entry in the forwarding table static.  
Adds a static entry to the forwarding table.  
Deletes a static entry from the forwarding table.  
Modifies a static entry from the forwarding table.  
Performs a search by port number and posts the search results  
at the top of the screen.  
Search by MAC  
Address  
Performs a search by MAC Address and posts the search re-  
sults at the top of the screen.  
30 ELS100-24TX User Interface  
ELS100-24TX  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Spanning Tree Configuration Menu  
The Spanning Tree Configuration Menu allows you to view and modify  
Spanning Tree parameters. Select b from the Switch Configuration Menu  
to view the Spanning Tree Configuration Menu. A letter identifies  
selections that can be modified. All other fields are read-only. Figure 3-8  
shows the Spanning Tree Configuration Menu and the accompanying  
table describes the Spanning Tree Configuration Menu.  
SPANNING TREE CONFIGURATION  
Access Control: READ/WRITE  
32768-000000000000  
Bridge ID  
Designated Root  
Root Path Cost  
Root Port  
0
NO PORT  
0
Topology Change Count  
a. Spanning Tree Protocol Enable  
b. Port Configuration Menu  
c. Hello Time (seconds)  
d. Forward Delay (seconds)  
e. Max Age (seconds)  
No  
2
15  
20  
f. Bridge Priority  
32768  
x. Previous Menu  
Enter Selection:  
Figure 3-8. Spanning Tree Configuration Menu  
Description  
Field  
Bridge ID  
A unique identifier for the bridge (switch) in the Spanning  
Tree. The ID is a combination of the bridge priority and  
port 1 MAC address.  
Designated Root  
The bridge in the Spanning Tree with the lowest Bridge  
ID value, designated as the root bridge.  
Root Path Cost  
Root Port  
The cost of the path to the root bridge.  
The port identifier of the port that offers the lowest cost  
path to the root bridge.  
Topology Change  
Count  
The count of the number of times the network topology  
has changed from a Spanning Tree reconfiguration.  
continued on next page  
9032579-03  
ELS100-24TX User Interface 31  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Spanning Tree Configuration Menu (continued)  
Description  
Selection  
Spanning Tree Protocol  
Enable  
Allows you to enable (Yes) or disable (No) the global  
Spanning Tree operation on the switch.  
Port Configuration Menu Provides access to the Spanning Tree Port Configura-  
tion Menu.  
The time interval between the sending of Configura-  
Hello Time (seconds)  
tion BPDUs by the bridge, if it is root (1-10 second  
range).  
Forward Delay  
(seconds)  
The time interval delay before a port transfers into the  
forwarding state, if it is root (4-30 second range).  
Max Age (seconds)  
Bridge Priority  
The maximum age of received protocol information  
before it is discarded (6-40 second range).  
A relative priority of bridges, with the lowest value  
bridge ID indicating the highest priority (0-65535  
range).  
32 ELS100-24TX User Interface  
ELS100-24TX  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Spanning Tree Port Configuration Menu  
The Spanning Tree Port Configuration Menu allows you to view Spanning  
Tree Configuration information for all of the ports in a table format. Select  
b from the Spanning Tree Configuration Menu to view the Spanning Tree  
Port Configuration Menu. Figure 3-9 shows the Spanning Tree Port  
Configuration Menu and the accompanying table describes the Spanning  
Tree Port Configuration Menu.  
SPANNING TREE PORT CONFIGURATION  
PORT ID PORT NAME PATH COST  
Access Control: READ/WRITE  
PORT PRIORITY PORT STATE  
---------------------------------------------------------------------------------------------------------  
1
2
3
4
5
6
7
8
9
10  
10  
10  
10  
10  
10  
10  
10  
10  
10  
128  
128  
128  
128  
128  
128  
128  
128  
128  
128  
FORWARDING  
FORWARDING  
FORWARDING  
FORWARDING  
FORWARDING  
FORWARDING  
FORWARDING  
FORWARDING  
FORWARDING  
FORWARDING  
10  
n. Next Page  
a. Select Port  
Enter Selection:  
p. Previous Page  
r. Refresh  
f. First Page  
l. Last Page  
x. Previous Menu  
Figure 3-9. Spanning Tree Port Configuration Menu  
Field  
Description  
Port ID  
A unique identifier for a port on the bridge (switch).  
The administrative name assigned to the port.  
Port Name  
Path Cost  
The contribution of the path through this port, when it is the root port,  
to the total path cost from this bridge to the root bridge. 10 for 100Mbps  
ports, 100 for 10Mbps ports.  
Port Priority  
Port State  
The relative priority of the port on the bridge.  
The current Spanning Tree state of the port on the bridge, either  
disabled, listening, learning, forwarding, or blocking.  
Selection  
Description  
Next Page  
Displays the next page of the table.  
Previous Page  
First Page  
Displays the previous page of the table.  
Displays the first page (top) of the table.  
Displays the last page of the table.  
Last Page  
Select Port  
Allows you to enter a port number to view and modify port parameters  
in the Spanning Tree Port #n Configuration Menu.  
9032579-03  
ELS100-24TX User Interface 33  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Spanning Tree Port #n Configuration Menu  
The Spanning Tree Port #n Configuration Menu allows you to view  
Spanning Tree Port Configuration information for an individual port.  
Select a from the Spanning Tree Port Configuration Menu to view the  
Spanning Tree Port #n Configuration Menu. Figure 3-10 shows the  
Spanning Tree Port #n Configuration Menu and the accompanying table  
describes the Spanning Tree Port #n Configuration Menu. The “Port #n”  
designation represents the specific port number for configuration.  
SPANNING TREE PORT #1 CONFIGURATION Access Control: READ/WRITE  
Port State  
DISABLED  
MAC Address  
0a0a0a0a0a0a  
Designated Cost  
Designated Port  
Designated Root  
Designated Bridge  
0
0
a. Path Cost  
10  
b. Port Priority  
32768  
x. Previous Menu  
Enter Selection:  
Figure 3-10. Spanning Tree Port Configuration Menu  
Description  
Field  
Port State  
The current Spanning Tree state of the port, either disabled,  
listening, learning, forwarding, or blocking.  
MAC Address  
The MAC address of the port.  
Designated Cost  
The cost of the path to the Root offered by the designated  
port for the LAN associated with the port.  
Designated Port  
Designated Root  
Designated Bridge  
The Port ID of the port believed to be the designated port for  
the LAN associated with the port.  
The Bridge ID of the bridge recorded as the Root for the LAN  
associated with the port.  
The Bridge ID of the bridge believed to be the designated  
bridge for the LAN associated with the port.  
Selection  
Description  
Path Cost  
The contribution of the path through this port, when it is the  
root port, to the total path cost from this bridge to the root  
bridge (1-65535 range).  
Port Priority  
The relative priority of the port on the bridge (0-255 range).  
34 ELS100-24TX User Interface  
ELS100-24TX  
Download from Www.Somanuals.com. All Manuals Search And Download.  
VLAN Configuration Menu  
The VLAN Configuration Menu allows you to configure the operation of  
virtual LANs (VLANs) in the switch. Select c from the Switch Configuration  
Menu to view the VLAN Configuration Menu. Figure 3-11 shows the VLAN  
Configuration Menu and the accompanying table describes the VLAN  
Configuration Menu. See Appendix D, “Virtual LANs (VLANs)” for more  
information about this feature.  
VLAN CONFIGURATION  
Access Control: READ/WRITE  
a. VLAN Enable  
b. VLAN Menu  
No  
c. VLAN Port Menu  
x. Previous Menu  
Enter Selection:  
Figure 3-11. VLAN Configuration Menu  
Description  
Selection  
VLAN Enable  
Allows you to enable (Yes) or disable (No) the  
global VLAN operation of the switch.  
VLAN Menu  
Allows you to open the VLAN Menu.  
VLAN Port Menu  
Menu for configuring VLAN information per  
port.  
9032579-03  
ELS100-24TX User Interface 35  
Download from Www.Somanuals.com. All Manuals Search And Download.  
VLAN Menu  
The VLAN Menu displays the configuration of VLANs in the switch and  
allows access to the VLAN #n Configuration Menu to create and configure  
VLANs. Select b from the VLAN Configuration Menu to view the VLAN  
Menu. Figure 3-12 shows the VLAN Menu and the accompanying table  
describes the VLAN Menu.  
VLAN MENU  
Access Control: READ/WRITE  
PORTS IN VLAN VLAN EGRESS PORTS  
ID VLAN NAME  
-------------------------------------------------------------------------------------------------------  
1 default 1-24 None  
c. Configure d. Delete x. Previous Menu  
Enter Selection:  
Figure 3-12. VLAN Menu  
Description  
Field  
ID  
The identification number of the VLAN (1-4 character  
range).  
VLAN Name  
The administrative name assigned to the VLAN (1-14  
character range; entering a VLAN name is not required).  
Ports in VLAN  
The ports assigned to the VLAN.  
VLAN Egress Ports  
The egress (exit) ports which link the ELS100-24TX to  
other devices which also include members of the same  
VLAN.  
Selection  
Description  
Configure  
Allows you to configure an existing VLAN listed in the  
VLAN table, create a new VLAN (1-4094 numerical  
range), and to open the VLAN #n Configuration Menu.  
Delete  
Allows you to delete a specific VLAN.  
36 ELS100-24TX User Interface  
ELS100-24TX  
Download from Www.Somanuals.com. All Manuals Search And Download.  
VLAN #n Configuration Menu  
The VLAN #n Configuration Menu allows you to configure a name for a  
specific VLAN, add or remove a port in the VLAN, and add or remove an  
egress port in the VLAN. Select c from the VLAN Menu to view the VLAN  
#n Configuration Menu. Figure 3-13 shows the VLAN #n Configuration  
Menu and the accompanying table describes the VLAN #n Configuration  
Menu.  
The designation “#n” represents the number of the spe-  
cific VLAN to be configured.  
When configuring ports using the Ports in VLAN param-  
eter, they will be moved to that selected VLAN, and auto-  
matically removed from their previous VLAN.  
VLAN #n CONFIGURATION  
Access Control: READ/WRITE  
Ports in VLAN  
VLAN Egress Ports  
1-24  
None  
a. VLAN Name  
default  
b. Add Port in VLAN  
c. Remove Port In VLAN  
d. Add VLAN Egress Port  
e. Remove VLAN Egress Port  
x. Previous Menu  
Enter Selection:  
Figure 3-13. VLAN #n Configuration Menu  
Field  
Description  
Ports in VLAN  
Lists the ports in the specific VLAN.  
VLAN Egress Ports  
Selection  
Lists the VLAN Egress Ports for the specific VLAN.  
Description  
VLAN Name  
Allows you to enter an administrative name for the  
VLAN (1-14 character range; entering a VLAN  
name is not required).  
Add Port in VLAN  
Allows you to enter a port in the VLAN.  
Allows you to remove a port in the VLAN.  
Allows you to add a VLAN Egress Port.  
Allows you to remove a VLAN Egress Port.  
Remove Port in VLAN  
Add VLAN Egress Port  
Remove VLAN Egress Port  
9032579-03  
ELS100-24TX User Interface 37  
Download from Www.Somanuals.com. All Manuals Search And Download.  
VLAN Port Menu  
The VLAN Port Menu displays a table of VLAN configuration information  
on a per port basis and allows you to modify the VLAN Port Type. Select  
c from the VLAN Configuration Menu to view the VLAN Port Menu. Figure  
3-14 shows the VLAN Port Menu and the accompanying table describes  
the VLAN Port Menu.  
VLAN PORT MENU  
Access Control: READ/WRITE  
PORT ID  
PORT NAME  
TYPE  
---------------------------------------------------------------------------------------------------------  
1
2
3
4
5
6
7
8
9
ACCESS  
ACCESS  
ACCESS  
ACCESS  
ACCESS  
ACCESS  
ACCESS  
ACCESS  
ACCESS  
ACCESS  
10  
n. Next Page  
p. Previous Page  
f. First Page  
l. Last Page  
a. Modify Port Type  
Enter Selection:  
x. Previous Menu  
Figure 3-14. VLAN Port Configuration Menu  
Field  
Description  
Port ID  
Port Name  
Type  
The number assigned to the port.  
The administrative name assigned to the port  
The VLAN type for each port (either Hybrid or Access).  
Hybrid ports accept tagged and non-tagged frames  
while Access ports only allow non-tagged frames.  
Selection  
Description  
Next Page  
Displays the next page of the table.  
Previous Page  
First Page  
Displays the previous page of the table.  
Displays the first page of the table.  
Displays the last page of the table.  
Last Page  
Modify Port Type Allows you to modify the port type (either Hybrid or  
Access).  
38 ELS100-24TX User Interface  
ELS100-24TX  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Class of Service Configuration Menu  
The Class of Service Configuration Menu allows you to configure Class of  
Service settings for the system as well as to set the Class of Service for  
VLAN tagged frames. Select d from the Switch Configuration Menu to  
view the Class of Service Configuration Menu. Figure 3-15 shows the  
Class of Service Configuration Menu and the accompanying table  
describes the Class of Service Configuration Menu.  
CLASS OF SERVICE CONFIGURATION  
Access Control: READ/WRITE  
a. Class of Service Enable  
b. Priority Threshold  
No  
4
c. Configure Port Priority  
x. Previous Menu  
Enter Selection:  
Figure 3-15. Class of Service Configuration Menu  
Description  
Selection  
Class of Service Enable  
Allows you to enable (Yes) or disable (No) Class of  
Service operation for the system.  
Priority Threshold  
Allows you to enter the global priority threshold level.  
The configurable range is 0-7 (0=low, 7=high).  
VLAN tagged frames with a priority level below this  
threshold level will be assigned normal priority level  
through the switch.  
VLAN tagged frames with a priority level equal to or  
greater than this threshold level will be assigned high  
priority through the switch.  
Configure Port Priority  
Allows you to open the Port Priority Menu for config-  
uring Class of Service information per port.  
9032579-03  
ELS100-24TX User Interface 39  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Port Priority Menu  
The Port Priority Menu allows you to modify and display a table which  
shows priority queuing configuration information on a per port basis.  
Select c from the Class of Service Configuration Menu to view the Port  
Priority Configuration Menu. Figure 3-16 shows the Port Priority  
Configuration Menu and the accompanying table describes the Port  
Priority Configuration Menu.  
PORT PRIORITY  
Access Control: READ/WRITE  
PRIORITY DEFAULT  
PORT ID PORT NAME  
-----------------------------------------------------------------------------------------------------------  
1
2
3
4
5
6
7
8
9
0
0
0
0
0
0
0
0
0
0
10  
n. Next Page  
c. Configure  
p. Previous Page  
x. Previous Menu  
f. First Page  
l. Last Page  
Enter Selection:  
Figure 3-16. Port Priority Configuration Menu  
Field  
Description  
Port ID  
Port Name  
The port number assigned to the port.  
The administrative name assigned to the port (1-14  
character range).  
Priority Default  
The priority level assigned to non-tagged frames enter-  
ing the associated port. The configurable range is 0-7  
(0=low, 7=high). This value, compared to the Priority  
Threshold Value, determines the priority level as-  
signed to all non-tagged frames.  
Selection  
Next Page  
Previous Page  
First Page  
Last Page  
Configure  
Description  
Displays the next page of the table.  
Displays the previous page of the table.  
Displays the first page of the table.  
Displays the last page of the table.  
Allows you to configure the priority default for a specific  
port (0-7 number range).  
40 ELS100-24TX User Interface  
ELS100-24TX  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Port Menu  
The Port Menu allows you to display information for each port in a table  
format, as well as to access the Port Configuration Menu. You can also  
refresh the screen information. Select c from the Main Menu to view the  
Port Menu. Figure 3-17 shows the Port Menu and the accompanying table  
describes the Port Menu.  
PORT MENU  
Access Control: READ/WRITE  
LINK  
AUTO  
FULL  
FLOW  
ID PORT NAME ENABLED  
STATUS  
NEGOTIATED DUPLEX SPEED TYPE CONTROL  
---------------------------------------------------------------------------------------------------------------------------------------  
1
2
3
4
5
6
7
8
Yes  
Yes  
Yes  
Yes  
Yes  
Yes  
Yes  
Yes  
Yes  
Yes  
Yes  
Yes  
CONNECTED  
CONNECTED  
CONNECTED  
CONNECTED  
CONNECTED  
CONNECTED  
CONNECTED  
CONNECTED  
CONNECTED  
CONNECTED  
CONNECTED  
CONNECTED  
No  
No  
No  
No  
No  
No  
No  
No  
No  
No  
No  
No  
Yes  
Yes  
Yes  
Yes  
Yes  
Yes  
Yes  
Yes  
Yes  
Yes  
Yes  
Yes  
100 100TX  
100 100TX  
100 100TX  
100 100TX  
100 100TX  
100 100TX  
100 100TX  
100 100TX  
100 100TX  
100 100TX  
100 100TX  
100 100TX  
No  
No  
No  
No  
No  
No  
No  
No  
No  
No  
No  
No  
9
10  
11  
12  
n. Next Page  
p. Previous Page  
c. Configure  
f. First Page  
x. Previous Menu  
l. Last Page  
r. Refresh  
Enter Selection:  
Figure 3-17. Port Menu  
Field  
ID  
Description  
The number assigned to the port.  
Port Name  
Enabled  
Link Status  
The administrative name assigned to the port (1-14 character range).  
The current “enabled” state of the port, either “Yes” or “No.”  
The current link state of the port, either “Connected” or “Disconnected.”  
Auto Negotiated The current state of auto-negotiation for the port, whether or not it has  
completed auto-negotiation, either “Yes” or “No”.  
Full Duplex  
Speed  
The current full duplex state of the port, either “Yes” or “No.”  
The current speed of the port, either 10Mbps or 100Mbps.  
The current enable/disable flow control port state, either “Yes” or “No.”  
The current type of connection: 10T=10Base-T, 100TX=100Base-TX.  
Description  
Flow Control  
Port Type  
Selection  
Next Page  
Previous Page  
First Page  
Last Page  
Refresh  
Displays the next page of the table.  
Displays the previous page of the table.  
Displays the first page (top) of the table.  
Displays the last page of the table.  
Refreshes the screen to reflect latest system conditions.  
Configure  
Opens up the Port Configuration Menu. From this menu you can con-  
figure an individual port or multiple ports (See Section 4).  
9032579-03  
ELS100-24TX User Interface 41  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Port Configuration Menu  
The Port Configuration Menu allows you to configure port settings for a  
specific port. Select c from the Port Menu to view the Port Configuration  
Menu. Figure 3-18 shows the Port Configuration Menu and the  
accompanying table describes the Port Configuration Menu.  
PORTS 1-5 CONFIGURATION  
Port Name  
Access Control: READ/WRITE  
a
b. Port Enable  
Yes  
c. Flow Control Enable  
d. Auto-negotiation Enable  
e. Full Duplex  
No  
Yes  
Yes  
100  
f. Port Speed  
x. Previous Menu  
Enter Selection:  
Figure 3-18. Port Configuration Menu  
Description  
Selection  
Port Name  
Allows you to assign an administrative name to the port  
(1-14 character range).  
Port Enable  
Allows you to enable (Yes) or disable (No) the port(s).  
Flow Control Enable  
Allows you to enable (Yes) or disable (No) flow control  
on the port(s).  
Auto-negotiation  
Enable  
Allows you to enable (Yes) or disable (No) the  
auto-negotiation mode for the port(s).  
If Auto-negotiation Enable is set to “No,” the Full Duplex  
and Port Speed fields display and are eligible for  
configuration.  
If Auto-negotiation Enable is set to “Yes,” the Full  
Duplex and Port Speed fields disappear and the system  
automatically manages these functions.  
Full Duplex  
Port Speed  
Allows you to enable (Yes) or disable (No) the full duplex  
mode for the port(s).  
Allows you to set the speed (10 or 100Mbps) for the  
port(s).  
42 ELS100-24TX User Interface  
ELS100-24TX  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Switch Statistics Screen  
The Switch Statistics Screen provides a summary display of port-level  
statistics, and provides access to the Port Statistics screens. You can also  
clear or refresh the statistics. Select d from the Main Menu to view the  
Switch Statistics Screen. Figure 3-19 shows the Switch Statistics Screen  
and the accompanying table describes the Switch Statistics Screen.  
SWITCH STATISTICS  
Access Control: READ/WRITE  
ID TRANSMITTED RECEIVED FORWARDED FILTERED DROPPED ERRORED  
---------------------------------------------------------------------------------------------------------------------------  
1
2
3
4
5
6
7
8
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
9
10  
n. Next Page  
p. Previous Page  
f. First Page  
l. Last Page  
s. Switch Summary  
d. Port Statistics  
x. Previous Menu  
r. Refresh  
c. Clear  
Enter Selection:  
Figure 3-19. Switch Statistics Screen  
Field  
Description  
ID  
The number assigned to the port.  
Number of frames transmitted out the port.  
Number of frames received on the port.  
Number of frames forwarded through the port.  
Number of frames filtered on the port.  
Transmitted  
Received  
Forwarded  
Filtered  
Dropped  
Number of frames received on the port that were dropped by the  
switch due to lack of resources.  
Errored  
Number of errored frames received on the port.  
Description  
Selection  
Next Page  
Previous Page  
First Page  
Last Page  
Switch Summary  
Port Statistics  
Refresh  
Displays the next page of the table.  
Displays the previous page of the table.  
Displays the first page of the table.  
Displays the last page of the table.  
Allows you to open the Switch Summary Screen.  
Allows you to open the Port Statistics Screen.  
Refreshes switch statistics.  
Clear  
Clears (or sets to zero) switch statistics.  
9032579-03  
ELS100-24TX User Interface 43  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Switch Summary Screen  
The Switch Summary Screen allows you to display sum total statistics for  
all ports of the switch. You can also clear or refresh the statistics. Select  
s from the Switch Statistics Screen to view the Switch Summary screen.  
Figure 3-20 shows the Switch Summary Screen and the accompanying  
table describes the Switch Summary Screen.  
SWITCH SUMMARY  
Access Control: READ/WRITE  
Frames Transmitted  
Frames Received  
Frames Forwarded  
Frames Filtered  
Frames Dropped  
Frames Errored  
0
0
0
0
0
0
r. Refresh  
c. Clear  
x. Previous Menu  
Enter Selection:  
Figure 3-20. Switch Summary Screen  
Field  
Description  
Frames  
Total number of frames transmitted out all ports.  
Transmitted  
Frames Received  
Total number of frames received on all ports.  
Frames Forwarded  
Frames Filtered  
Frames Dropped  
Total number of frames forwarded through the switch.  
Total number of frames filtered on all ports.  
Total number of frames dropped by the switch due to lack  
of resources.  
Frames Errored  
Selection  
Refresh  
Total number of errored frames received from all ports.  
Description  
Refreshes switch summary statistics.  
Clears (or sets to zero) switch summary statistics.  
Clear  
44 ELS100-24TX User Interface  
ELS100-24TX  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Port Statistics Screen  
The Port Statistics Screen allows you to display statistics for each port on  
the switch. Many of these statistics correspond to the Statistics group of  
RMON. You can also refresh or clear the statistics. Select s from the  
Switch Statistics Screen to view the Port Statistics screen. Figure 3-21  
shows the Port Statistics Screen and the accompanying table describes  
the Port Statistics Screen.  
PORT 1 STATISTICS  
Access Control: READ/WRITE  
Collisions 0  
Frames Transmitted  
Frames Received  
Frames Forwarded  
Frames Filtered  
0
0
0
0
0
0
0
0
0
0
0
0
0
Late Collisions  
0
0
0
0
0
0
0
0
0
0
0
0
CRC/Alignment Errors  
Undersized Frames  
Oversized Frames  
Fragments  
Frames Dropped  
Broadcasts Transmitted  
Broadcasts Received  
Multicasts Transmitted  
Multicasts Received  
Bytes Transmitted  
Bytes Received  
Pause Frames Transmitted  
Pause Frames Received  
Jabbers  
64 Byte Frames  
65 to 127 Byte Frames  
128 to 255 Byte Frames  
256 to 511 Byte Frames  
512 to 1023 Byte Frames  
1024 to 1518 Byte Frames  
r. Refresh  
c. Clear  
x. Previous Menu  
Enter Selection:  
Figure 3-21. Port Statistics Screen  
Description  
Field  
Frames Transmitted  
Frames Received  
Frames Forwarded  
Total number of frames transmitted on the port.  
Total number of frames received on the port.  
Total number of frames received on the port which  
were forwarded to other ports.  
Frames Filtered  
Frames Dropped  
Total number of frames received on the port which  
were filtered.  
Total number of frames received on the port which  
were dropped by the switch due to lack of resources.  
Broadcasts  
Transmitted  
Total number of broadcast frames transmitted on the  
port.  
Broadcasts Received  
Total number of broadcast frames received on the  
port.  
continued on next page  
9032579-03  
ELS100-24TX User Interface 45  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Figure 3-21 Port Statistics Screen (continued)  
Description  
Field  
Multicasts Transmitted  
Total number of multicast frames transmitted on the  
port.  
Multicasts Received  
Total number of multicast frames received on the  
port.  
Bytes Transmitted  
Total number of bytes transmitted on the port.  
Total number of bytes received on the port.  
Bytes Received  
Pause Frames Transmitted  
Total number of flow control pause frames  
transmitted on the port.  
Pause Frames Received  
Total number of flow control pause frames received  
on the port.  
Collisions  
Total number of collisions detected on the port.  
Total number of late collisions detected on the port.  
Late Collisions  
CRC/Alignment Errors  
Total number of frames received on the port which  
had either a CRC or an alignment error.  
Undersized Frames  
Oversized Frames  
Fragments  
Total number of frames received on the port which  
were undersized.  
Total number of frames received on the port which  
were oversized.  
Total number of frames received on the port which  
were fragments.  
Jabbers  
Total number of frames received on the port which  
were jabbers.  
64 Byte Frames  
Total number of frames received and transmitted on  
the port which were 64 bytes in length.  
65 to 127 Byte Frames  
128 to 255 Byte Frames  
256 to 511 Byte Frames  
512 to 1023 Byte Frames  
1024 to 1518 Byte Frames  
Total number of frames received and transmitted on  
the port which were from 65 to 127 bytes in length.  
Total number of frames received and transmitted on  
the port which were from 128 to 255 bytes in length.  
Total number of frames received and transmitted on  
the port which were from 256 to 511 bytes in length.  
Total number of frames received and transmitted on  
the port which were from 512 to 1023 bytes in length.  
Total number of frames received and transmitted on  
the port which were from 1024 to 1518 bytes in  
length.  
Selection  
Refresh  
Clear  
Description  
Refreshes port statistics.  
Clears (or sets to zero) port statistics.  
46 ELS100-24TX User Interface  
ELS100-24TX  
Download from Www.Somanuals.com. All Manuals Search And Download.  
General Information Screen  
The General Information Screen allows you to view general system  
information. Select e from the Main Menu to view the General Information  
Screen. Figure 3-22 shows the General Information Screen and the  
accompanying table describes the General Information Screen.  
GENERAL INFORMATION  
Access Control: READ/WRITE  
1.00  
Software Version  
Serial Number  
100  
Base MAC Address  
Up Time(minutes)  
Power Up Count  
00c0ba000000  
12  
1
x. Previous Menu  
Enter Selection:  
Figure 3-22. General Information Screen  
Description  
Field  
Software Version  
The version of systemsoftware currently operating  
on the switch.  
Serial Number  
The serial number of the switch.  
Base MAC Address  
The base MAC address of the switch (port 1  
address).  
Up Time (minutes)  
Power Up Count  
The number of minutes the switch has been  
operational since the last power cycle or reset.  
The number of times the system has powered up  
or been reset since the switch was originally  
shipped from the factory.  
9032579-03  
ELS100-24TX User Interface 47  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Download Software Menu  
The Download Software Menu allows you to set up and initiate a software  
download. Select f from the Main Menu to view the Download Software  
Menu. Figure 3-23 shows the Download Software Menu and the  
accompanying table describes the Download Software Menu.  
DOWNLOAD SOFTWARE  
Access Control: READ/WRITE  
a. TFTP Server IP Address  
b. TFTP File Name  
1.2.3.4  
c. Start TFTP Download  
d. Start XMODEM Download  
x. Previous Menu  
Enter Selection:  
Figure 3-23. Download Software Menu  
Selection  
Description  
TFTP Server IP Address  
TFTP File Name  
The IP address of the TFTP server.  
The file name to be downloaded from the  
TFTP server (maximum of 80 characters).  
Start TFTP Download  
Starts a TFTP download using TFTP Server  
IP Address and TFTP File Name information.  
Start XMODEM Download  
Starts an XMODEM (serial) download.  
48 ELS100-24TX User Interface  
ELS100-24TX  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Save Current Configuration  
The Save Current Configuration screen ensures that all changes made to  
the ELS100-24TX switch via the console menus will be stored in the event  
of power outages or power cycles.  
To save your current configuration, do the following:  
1. Select g from the Main Menu to view the Save Current Configuration  
screen.  
The following message prompt displays:  
The current settings will become permanent.  
All the saved settings will be lost!  
a. OK  
x. Cancel and return to the Previous Menu  
2. Select either a to confirm the process or x to cancel the process.  
Return to Default Configuration  
The Return to Default Configuration screen allows you to restore the  
original factory default switch settings before changes were made via the  
user interface or SNMP.  
To return to default configuration settings, do the following:  
1. Select h from the Main Menu to view the Return to Default  
Configuration screen.  
The following message prompt displays:  
Switch will return to default settings.  
All the current changes and settings will be lost!  
a. OK  
x. Cancel and return to the Previous Menu  
2. Select either a to confirm the process or x to cancel the process.  
Logout  
The Logout menu item allows you to log out of the user interface and  
return to the Login screen. Select i from the Main Menu to logout. After  
this command is entered, the system logout occurs automatically.  
9032579-03  
ELS100-24TX User Interface 49  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Reset  
The Reset screen allows you to restore the latest saved configuration or  
system defaults if the system configuration has not been saved.  
To reset the switch, do the following:  
1. Select j from the Main Menu to view the Reset screen.  
The following message prompt displays:  
Switch will go through a hardware reset.  
All the current changes that have not been saved  
will be lost!  
a. Save changes and Reset  
b. Don’t save changes and Reset  
x. Cancel and return to the Previous Menu  
2. Select either a to confirm the process or x to cancel the process.  
50 ELS100-24TX User Interface  
ELS100-24TX  
Download from Www.Somanuals.com. All Manuals Search And Download.  
4. CONFIGURING & MONITORING THE SWITCH  
Common Tasks  
The switch console menus allow you to modify default switch settings and  
configure the switch for network management. They also allow you to  
monitor switch performance and status. See Section 3, “ELS100-24TX  
User Interface,” for an overview of the menu hierarchy and a description  
of all menus. The following sections describe common tasks in setting up  
and operating the ELS100-24TX switch.  
To begin, set operating parameters and make sure the network  
connections are correct by performing these tasks:  
Setting password protection for the switch to prevent unauthorized  
access to console menus  
Assigning an IP address for the switch if you plan to manage the  
switch using SNMP, or if you use Telnet to access the switch  
Checking network configuration status and verifying that network  
connections are correct  
After the switch is installed and operating, you may want to perform any  
of the following tasks:  
Connecting via Telnet for in-band access to the console menus  
Setting SNMP parameters for management access  
Viewing switch statistics to monitor and evaluate switch performance  
and traffic patterns on the network  
Configuring port mirroring  
Downloading a software upgrade  
Configuring Spanning Tree parameters  
Configuring VLANs  
Configuring Class of Service  
Configuring port operation (enable/disable, port speed, full/half  
duplex and flow control)  
Configuring the forwarding table  
Configuring the broadcast cutoff rate  
Setting a default gateway  
Configuring BootP/DHCP  
9032579-03  
Configuring & Monitoring The Switch 51  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Setting Password Protection  
The ELS100-24TX switch is factory-configured with access rights to the  
console menus set to READ/WRITE. This setting allows anyone to use  
the console menus to modify any operational parameter. To protect the  
configuration of the switch from unauthorized modification, you should  
enable password protection to the console menus.  
To enter a password, do the following:  
1. Select Password from the System Configuration Menu and  
press [Enter].  
2. Enter a password containing six to eight alphanumeric characters.  
The password is not case sensitive. For verification, you are asked to  
enter your password again. If both entries agree, the new password is  
stored.  
By factory default, there is no password configured. This means that at  
the login:prompt, all you have to do is press [Enter] to gain READ/  
WRITE access to the console menus. When you configure the password  
parameter, the factory default setting is deactivated and the new  
password governs access to the console menus.  
After you enter a password and logout using the Logout command from  
the Main Menu, all access rights change to READ-ONLY. The current  
level of access control is indicated at the top of the management screen.  
If you forget your password, contact your NetVantage System Support  
Representative.  
You are automatically logged out from the console menus  
based on the Screen Timeout setting in the System Config-  
uration Menu. A setting of “0” permits the console menus  
to remain available indefinitely.  
Assigning an IP Address  
To assign an IP address to the switch, do the following:  
1. Select System Configuration Menu from the Main menu.  
2. Select IP address from the menu and enter the IP address.  
Press [Enter].  
The IP address is now programmed. The subnet mask is automatically set  
to correspond to the class of the address entered. If a different mask is  
used on the network, select Subnet Mask from the menu and enter the  
appropriate mask.  
52 Configuring & Monitoring The Switch  
ELS100-24TX  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Checking Network Configuration Status  
To check connection status for the network, do the following:  
1. Select Port Menu from the Main Menu.  
If a network cable is properly connected to a port, the Link Status for  
the port reads CONNECTED. If no cable is connected to the port, or  
if the cable or port is faulty, the Link Status for the port reads DIS-  
CONNECTED.  
2. If you see a DISCONNECTED status for a connected port, plug the  
cable into another port on the switch or try another cable.  
Connecting via Telnet  
You can connect to the ELS100-24TX switch from a remote location using  
the Telnet application. This application allows you to establish in-band  
access to the console menus.  
To connect to the ELS100-24TX switch via Telnet, do the following:  
1. Assign an IP address using the System Configuration Menu.  
2. Set a password using the System Configuration Menu.  
3. Login to the ELS100-24TX switch via Telnet using the configured IP  
address and the password.  
Setting SNMP Management Access  
Access to the ELS100-24TX switch through SNMP is controlled by  
community names. The community names set for the switch must match  
those used by the SNMP management station for successful  
communication to occur. The switch uses two community names. The  
“Public” community name allows read-only access to the device via  
SNMP. The “Private” community name allows read/write access.  
The ELS100-24TX switch can send SNMP messages called traps to  
SNMP management stations when an important event occurs with the  
switch. The switch allows up to four destinations to be configured for  
these trap messages to be sent.  
To configure SNMP access for the switch, do the following:  
1. Select System Configuration Menu from the Main Menu.  
2. Select SNMP Configuration Menu.  
3. Select SNMP Private Community Name from the menu and enter the  
desired read/write access community name (you are permitted to  
enter from one to 10 characters).  
4. Select SNMP Public Community Name and enter the desired read-  
only community name (you are permitted to enter from one to 10  
characters).  
9032579-03  
Configuring & Monitoring The Switch 53  
Download from Www.Somanuals.com. All Manuals Search And Download.  
5. Select one or more Trap Destination entries from the menu and enter  
the appropriate IP addresses.  
6. For each trap destination entered, a corresponding community name  
should be entered.  
Viewing Switch Statistics  
To view switch statistics, do the following:  
1. Select Switch Statistics Screen from the Main Menu.  
The screen lists the main statistical counts for all ports on the switch  
simultaneously.  
2. Select Switch Summary from the Switch Statistics Screen.  
The screen lists a summary of sum total statistics for all ports on the  
switch.  
3. Select Port Statistics from the Switch Statistics Screen.  
4. Enter the port number. Press [Enter].  
The screen lists expanded port-level statistics for an individual port.  
5. On any of the statistics screens, select Clear to clear (zero) the  
displayed statistical counts and Refresh to refresh (update) the  
displayed statistical counts.  
Configuring Port Mirroring  
You can mirror the traffic being switched on any port for the purposes of  
network traffic analysis and connection assurance. When Port Mirroring  
is enabled, one port in each group of eight becomes a monitor port for any  
one of the other ports within the group.  
To configure port mirroring, do the following:  
1. Select Switch Configuration Menu from the Main Menu.  
2. Turn the switch port mirroring operation on or off by toggling the Port  
Mirroring Enable option (pressing g).  
3. Select Mirrored Port for the port to be mirrored (traffic information  
source) and enter the number of the port. Press [Enter].  
4. Select Mirroring Port for the port which receives the mirrored data  
(traffic information destination) and enter the number of the port.  
Press [Enter].  
5. Select Transmit Data Mirror Enable to mirror the data being  
transmitted out the mirrored port to the mirroring port. Alternatively,  
select Receive Data Mirror Enable to mirror the data being received  
on the mirrored port to the mirroring port. Only one of these  
parameters can be enabled at a given time.  
6. Connect a traffic analyzer or RMON probe to the mirroring port.  
54 Configuring & Monitoring The Switch  
ELS100-24TX  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Downloading a Software Upgrade  
You can upgrade the operational software in the ELS100-24TX switch  
without physically opening the switch or being in the same location. The  
software storage sector in the flash memory of the switch is  
reprogrammable, allowing you to easily download software feature  
enhancements and problem fixes to the switch from a local or remote  
location.  
Software can be downloaded to the switch in two ways:  
Via the serial port. This procedure is an out-of-band operation that  
copies the software through the serial port to the switch. This  
operation takes approximately 10 minutes and requires minimal  
configuration.  
Via TFTP download. This procedure uses a TFTP server connected  
to the network and downloads the software using the TFTP protocol.  
A TFTP download is much faster than a serial download, requiring  
only a few seconds, and can be used to upgrade an ELS100-24TX  
switch that is not physically proximate. The disadvantage is that this  
method requires a TFTP server and additional setup.  
Downloading Via the Serial Port  
A serial download is the easiest method to upgrade the ELS100-24TX  
switch software, requiring the least amount of equipment and  
configuration.  
To download switch software via the serial port, do the following:  
1. Select Download Software Menu from the Main Menu.  
2. Select Start XMODEM Download.  
The following message prompt displays:  
Software downloader is running.  
Software downloader request: Please start XMODEM  
transfer (9600, N, 1). (Please ignore any  
characters that may appear on the next line).  
3. Send the file using the XMODEM protocol from your computer  
application (the procedure varies depending upon the application  
used).  
When the XMODEM procedure finishes, the following message  
prompt displays:  
Software download successfully completed XMODEM  
download. Please wait while program flash is being  
written. Software downloader is exiting after  
successful download to flash. Please wait while  
system initializes.  
The system software will reinitialize and display the login prompt.  
9032579-03  
Configuring & Monitoring The Switch 55  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Downloading Via TFTP  
To perform a TFTP download, you must first configure the ELS100-24TX  
switch. This consists of programming the switch with an IP address, if this  
has not already been done, and entering the IP address of the TFTP  
server and the name of the upgrade file. To program the switch IP  
address, go to the System Configuration Menu which is accessible from  
the Main Menu screen.  
To download switch software via TFTP, do the following:  
1. Select TFTP Server IP Address from the Download Software Menu.  
2. Enter the TFTP server IP address and press [Enter].  
3. Select TFTP File Name and enter the file name to be downloaded  
from the TFTP server.  
For a TFTP download, the path to the file must be in-  
cluded in its name. For example, if the upgrade file  
name is filename.bin and it resides in the directry /  
usr/tftp on the TFTP server, then you must enter the  
TFTP file name as: “/usr/tftp/filename.bin”.  
4. If necessary, configure the address of an IP gateway to reach the  
server from the switch using the Default Gateway field on the System  
Configuration Menu.  
5. Configure the TFTP server by copying the download file from the  
upgrade disk to an appropriate directory and starting the server.  
6. Select Start TFTP Download and press [Enter].  
To verify that the TFTP download has been successfully completed,  
note the software version level displayed on the General Information  
Screen accessible from the Main Menu. This number should match  
the version number that appears on the upgrade disk.  
Configuring Spanning Tree Parameters  
The ELS100-24TX switch supports the IEEE 802.1D Spanning Tree  
Protocol. This protocol allows redundant connections to be created  
between LAN segments for purposes of fault tolerance. Two or more  
physical paths between different segments can be created through the  
switch, with the Spanning Tree Protocol choosing a single path at any  
given time and disabling all others.  
56 Configuring & Monitoring The Switch  
ELS100-24TX  
Download from Www.Somanuals.com. All Manuals Search And Download.  
If the cosen path fails for any reason, a disabled alternative is activated,  
thereby maintaining the connection. See Appendix B, “Spanning Tree  
Concepts,” for further information on using the Spanning Tree Protocol in  
a network.  
Configuring Spanning Tree parameters from their  
default can cause serious deterioration of network  
performance.  
To configure Spanning Tree Parameters, do the following:  
1. Select Switch Configuration Menu from the Main Menu.  
2. Select Spanning Tree Configuration Menu.  
3. Turn the switch Spanning Tree operation on or off by toggling the  
Spanning Tree Protocol Enable option by pressing a.  
4. Select Port Configuration.  
The Spanning Tree Port Configuration Menu displays. Change the  
parameters that display in this menu as required.  
Configuring VLANs  
A virtual LAN (VLAN) is a group of devices on one or more LANs that are  
configured such that they can communicate as if they were attached to  
the same wire. Because VLANs are based on logical instead of physical  
connections, they are extremely flexible.  
The most fundamental benefit of VLAN technology is the ability to create  
workgroups based on function rather than on physical location or media.  
For further information, see Appendix D, “Virtual LANs (VLANs).”  
To configure VLANs, do the following:  
1. Select Switch Configuration Menu from the Main Menu.  
2. Select VLAN Configuration Menu.  
3. Turn the global switch VLAN operation on or off by toggling the VLAN  
Enable option by pressing a.  
4. Select VLAN Menu.  
The VLAN Menu displays. This menu displays the current  
configuration of VLANs in the system.  
5. To delete a current VLAN, select Delete, then enter the number of the  
VLAN.  
6. To configure a VLAN, select Configure and enter a VLAN number. A  
new VLAN can be created this way.  
The VLAN #n Configuration Menu displays. From this menu, you can  
configure VLAN names, add/delete ports in a VLAN, and add/delete  
egress ports for a VLAN.  
9032579-03  
Configuring & Monitoring The Switch 57  
Download from Www.Somanuals.com. All Manuals Search And Download.  
7. From the main VLAN Configuration Menu, select VLAN Port Menu to  
configure the VLAN port mode (hybrid or access) for individual ports.  
Configuring Class of Service  
You can configure Class of Service parameters using the Class of Service  
Configuration Menu. This menu permits you to configure priority levels to  
traffic being forwarded through the switch. During periods of congestion,  
Class of Service settings ensure that traffic which has been assigned high  
priority is forwarded through the switch ahead of normal priority traffic. For  
further information, see Appendix E, “Class of Service.”  
To configure Class of Service, do the following:  
1. Select Class of Service Configuration Menu from the Switch  
Configuration Menu.  
2. Turn the global switch Class of Service operation on or off by toggling  
the Class of Service Enable option by pressing a.  
3. Select Priority Threshold and type a number between 0 and 7.  
4. Select Configure Port Priority.  
The Port Priority Menu displays. From this menu, individual port pri-  
ority levels can be configured.  
Configuring Port Operation  
You can configure ports for operational parameters such as auto-  
negotiation, duplex mode, port speed and flow control.  
To configure port operation, do the following:  
1. Select Port Menu from the Main Menu.  
2. Select Configure and enter an individual port number or multiple port  
numbers. Press [Enter].  
Examples: You can configure an individual port or  
multiple ports, separated by commas or hyphens,  
in either:  
a list: ports 1, 3, 5, 7  
a range: ports 6-9  
or a combination of both: 1, 3, 5, 7, 10-15, 21, 23  
The port number(s) entered displays on the top of the Port  
Configuration screen.  
3. Select Port Name and enter a Port Name. Press [Enter].  
4. Select Port Enable to toggle between enabling (Yes) and disabling  
(No) the port(s).  
58 Configuring & Monitoring The Switch  
ELS100-24TX  
Download from Www.Somanuals.com. All Manuals Search And Download.  
5. Select Flow Control Enable to toggle between enabling (Yes) or  
disabling (No) flow control on the port(s).  
6. Select Auto-negotiation Enable to toggle between enabling (Yes) or  
disabling (No) auto-negotiation on the port.  
If Auto-negotiation Enable is set to No, the Full Duplex  
and Port Speed modes need to be configured.  
If Auto-negotiation Enable is set to Yes, the Full Duplex  
and Port Speed fields disappear and the system auto-  
matically configures these functions.  
7. Select Full Duplex to toggle between Yes (Full Duplex) and No (Half  
Duplex) mode on the port(s).  
8. Select Port Speed to toggle between 10Mbps and 100Mbps speeds  
on the port(s).  
Configuring the Forwarding Table  
The Forwarding Table allows you to designate forwarding treatment  
through the switch for specific MAC addresses, allowing you to maintain  
the efficiency and security of your network. You can search for specific  
MAC addresses by the address itself or by port number. The switch learns  
addresses dynamically from incoming packets and builds a table of these  
addresses along with their associated ports. There are three types of  
MAC addresses in the forwarding table:  
Dynamic MAC addresses, which are dynamically learned and  
removed by the switch based on a time period defined using the  
Forwarding Table Aging Time option in the Switch Configuration  
Menu.  
Static MAC addresses, which are entered manually, stored in  
nonvolatile memory and automatically placed in the forwarding table.  
System MAC addresses, which are set by the system software and  
cannot be modified. Each switch port has a permanent system MAC  
address assigned to it.  
There are three types of dispositions associated with each address in the  
forwarding table:  
Forward, which directs packets destined for a specific MAC address  
to a specific port.  
Discard, which drops packets destined for a specific MAC address  
(and thus provides a security function by blocking certain packets).  
Local, which is for packets destined for the switch itself (such as a  
“local” SNMP management packet).  
To configure the forwarding table, do the following:  
1. Select Switch Configuration Menu from the Main Menu.  
2. Select Forwarding Table Configuration Menu.  
9032579-03  
Configuring & Monitoring The Switch 59  
Download from Www.Somanuals.com. All Manuals Search And Download.  
To either make an existing dynamic entry static (Make Entry Static) or  
delete a static entry (Delete Static Entry), do the following:  
1. Select the letter associated with the option.  
The following message prompt displays:  
Enter MAC Address:  
2. Enter the MAC address. Press [Enter].  
To either add a static entry (Add Static Entry) or modify a static entry  
(Modify Static Entry), do the following:  
1. Select the letter associated with the option.  
The following message prompt displays:  
Enter MAC Address:  
2. Enter the MAC address. Press [Enter].  
The following message prompt displays:  
Forward to Port (Y/N):  
3. Do one of the following:  
If you select “Y” and Press [Enter], the system displays:  
Enter Port Number (1-24):  
Enter the port number. Press [Enter].  
If you select “N” and press [Enter], the system displays “discard” in  
the Disposition field.  
Configuring Broadcast Throttling  
This setting affects the throttling of excessive broadcast or unicast  
packets with unknown MAC addresses being handled by the switch.  
Normally, when these types of packets are received by the switch, they  
are forwarded (flooded) to every port on the switch or on a VLAN.  
However, if the receiving rate of these packets exceeds the broadcast  
cutoff rate, the switch will throttle back or limit the forwarding of these  
packets based on the configured Broadcast Cutoff Rate. This mechanism  
helps to prevent broadcast storms, a problem often encountered in  
Ethernet networks.  
To configure the broadcast cutoff rate, do the following:  
1. Select Switch Configuration Menu from the Main Menu.  
2. Select Broadcast Cutoff Rate, enter the rate value, and press [Enter].  
Valid values are in the range from 100 to 500,000 per second. This  
rate value is applied to each grouping of 8 ports on the switch. A set-  
ting of 500,000 essentially disables this feature.  
60 Configuring & Monitoring The Switch  
ELS100-24TX  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Setting a Default Gateway  
The Default Gateway parameter defines the IP address of a router or  
other network device to which IP packets are to be sent if destined for a  
subnet outside of that which the switch is operating.  
To set a default gateway, do the following:  
1. Select System Configuration Menu from the Main Menu.  
2. Select Default Gateway.  
3. Enter the gateway IP address. Press [Enter].  
Configuring BootP/DHCP  
The DHCP and BootP protocols allow you to automatically configure the  
switch’s IP address information. Enabling this feature greatly speeds up  
device configuration, especially when a large number of devices are  
installed.  
A DHCP and/or BootP server must be operating on the network and be  
properly configured for this option to work. When this option is enabled,  
the switch first tries to obtain an IP address from a DHCP server. If this  
fails, the switch tries to obtain an IP address from a BootP server. If this  
fails, the switch uses a previously configured IP address, if one exists.  
To configure BootP/DHCP, do the following:  
1. Select System Configuration Menu from the Main Menu.  
2. Select BootP/DHCP Enable.  
This selection toggles between Enable and Disable.  
9032579-03  
Configuring & Monitoring The Switch 61  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Download from Www.Somanuals.com. All Manuals Search And Download.  
5. SNMP MANAGEMENT  
The SNMP Protocol  
SNMP (Simple Network Management Protocol) is a communication  
protocol designed specifically for the purpose of managing devices or  
other elements on a network. Network equipment commonly managed  
with SNMP includes hubs, switches, routers, and host computers. SNMP  
is typically used to configure these types of devices for proper operation  
in their network environment, as well as to monitor them to evaluate their  
performance and detect potential problems.  
Managed entities supporting SNMP typically contain software, which runs  
locally on the device and is referred to as an agent. In Figure 5-1, software  
in an ELS100-24TX switch functions as an agent, monitoring and  
controlling the functionality of the switch.  
Figure 5-1. ELS100-24TX Switches Managed by an  
SNMP Management Workstation  
A defined set of variables, referred to as managed objects, is maintained  
by the agent and used to manage the device. These objects are defined  
in a Management Information Base (MIB) which allows for a standard  
presentation of the information controlled by the agent over the network.  
The software used to access the information maintained by the SNMP  
agents across a network is referred to as the SNMP Manager, and  
typically runs on a workstation.  
The SNMP manager software uses a MIB specification, equivalent to that  
which the agent maintains, to read and write objects controlled by the  
agent for purposes of configuring and monitoring the device. SNMP  
defines the format of the MIB specifications and the protocol used to  
access this information.  
9032579-03  
SNMP Management 63  
Download from Www.Somanuals.com. All Manuals Search And Download.  
There are three main operations defined in SNMP:  
Operations that read information from the managed device, such as  
those used to obtain status or statistical data, are called GET  
operations.  
Operations that change a functional parameter on the device, such  
as those used to configure Spanning Tree or to initiate a software  
download, are referred to as SET operations. GET and SET  
operations are initiated only by the manager software, and result in a  
response by the agent.  
The third operation type, the TRAP, allows the agent to send an  
unsolicited message to the manager. This operation is typically used  
as an alert of a potential problem or a change of status with the  
device. The Trap Destination parameter in the SNMP Configuration  
Menu is used to configure the IP addresses of the SNMP Manager to  
which ELS100-24TX trap messages are sent.  
MIB Objects  
A number of standard MIB specifications have been defined for managing  
network equipment. SNMP compliant devices typically support one or  
more standard MIBs defined by the Internet Engineering Task Force  
(IETF), in the form of Request for Comments (RFC) documents.  
These MIBs provide a common method of managing devices, such as  
switches and hubs, and network interfaces, such as Ethernet and token  
ring. The primary standard MIB, referred to as MIB-II, provides an overall  
view of the managed agent and must be supported, at least in part, by all  
SNMP agents. In addition, proprietary MIB extensions are defined by  
commercialvendorsformanagingdevice-specificfunctionsoftheirproducts.  
The ELS100-24TX switch supports four standard MIBs:  
RFC 1213 - Management Information Base for Network  
Management of TCP/IP based Internets (MIB-II)  
RFC 1398 - Definitions of Managed Objects for the Ethernet-like  
Interface Types (Ethernet MIB)  
RFC 1493 - Definitions of Managed Objects for Bridges  
RFC 1757 - Remote Network Monitoring Management Information  
Base  
The ELS100-24TX switch also supports Cabletron proprietary MIB  
extensions.  
RFC 1213 (MIB-II)  
RFC 1213 provides management of switch system-level parameters,  
including TCP/IP protocol-related statistics, IP addressing, routing table  
information, and interface statistics for each switch port. MIB-II is the  
standard MIB defined by RFC 1213. All agent devices operating SNMP  
are required to support at least part of MIB-II.  
64 SNMP Management  
ELS100-24TX  
Download from Www.Somanuals.com. All Manuals Search And Download.  
This MIB reports information about the protocols and network interfaces  
supported on the agent itself, as well as other general information. The  
MIB is divided into a number of groups, each of which corresponds to a  
specific protocol or set of information. Some groups are defined in other  
RFC documents.  
The groups specifically defined in RFC 1213 and supported by the  
ELS100-24TX switch system software are as follows:  
System – General information about the agent system  
Interfaces – Information about the network interfaces of the system  
Address Translation – Interface address information, both MAC level  
and network (IP) level  
IP – Statistics and information related to the IP protocol  
ICMP – Statistics and information related to the ICMP protocol  
TCP – Statistics and information related to the TCP protocol  
UDP – Statistics and information related to the UDP protocol  
Transmission – Statistics and information related to the physical  
network medium to which the system interfaces (e.g. Ethernet, token  
ring, etc.).  
SNMP – Statistics and information related to the SNMP protocol  
RFC 1398 (Ethernet MIB)  
RFC 1398 provides management and monitoring for the Ethernet-specific  
aspects of each port on the switch. This is the Ethernet-specific statistics  
subgroup of the MIB-II Transmission group. This group provides a set of  
statistics related to Ethernet’s physical level operation. Specifically, error  
and collision-related statistics are presented.  
RFC 1493 (Bridge MIB)  
RFC 1493 is a group defined under MIB-II. This MIB deals with the  
operation of the system as an 802.1D-compliant bridge. Areas of  
functionality supported by this group include Spanning Tree and  
forwarding table information and configuration.  
RFC 1757 (RMON MIB)  
RFC 1757 is a group defined under MIB-II. This MIB provides  
management for the RMON aspects of the switch. The ELS100-24TX  
switch supports four of the nine groups of RMON defined for Ethernet  
networks on a per port basis. For further information, see the subsection  
“RMON” in Chapter 1.  
9032579-03  
SNMP Management 65  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Cabletron Proprietary MIB Extensions  
Areas of ELS100-24TX switch functionality not covered by the standard  
RFC MIBs are specified in the Cabletron private MIB. This MIB definition  
is specified separately from MIB-II. Areas covered in this MIB include  
various system, switch, and port level information. System information  
MIB variables are shown in Table 5-1, switch information variables in  
Table 5-2, and port variables in Table 5-3.  
Table 5-1. System Information Variables  
Variable  
Description  
SerialNo  
Serial number of the unit.  
TftpIpAddress  
TftpFilename  
TFTP server IP address for TFTP downloads.  
Filename of the download upgrade file on the  
TFTP server.  
PowerUpCount  
Cumulative number of times switch has powered  
up or been reset.  
BroadcastCutoffRate  
Per second rate past which broadcast and  
destination unknown unicast frames are not  
flooded on each group of 8 ports on the switch.  
GatewayIPAddress  
TftpStartDownload  
BootpDhcpEnable  
Reset  
IP address of the default gateway (router) to which  
packets destined for another subnet are sent.  
Start TFTP downloads via SNMP, using  
TftpIpAddress and TftpFilename.  
Enable/disable BootP/DHCP for IP address  
configuration.  
Remotely execute a software reset of the switch.  
66 SNMP Management  
ELS100-24TX  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Table 5-2. Switch Information Variables  
Description  
Variable  
SwitchIpAddress  
SwitchSubnetMask  
IP address of the switch, used for management.  
Subnet mask corresponding to the  
SwitchIPAddress.  
ActiveAgingTime  
SwitchStpStatus  
Aging tick period in seconds by which addresses in  
the forwarding table are aged out.  
Enable/disable operation of Spanning Tree on the  
switch.  
SwitchManager  
List of SNMP trap manager IP addresses.  
SNMP trap manager IP address #1.  
SwitchTrapRcvr1  
SwitchTrapCommunity1  
SNMP community associated with trap manager IP  
address #1.  
SwitchTrapRcvr2  
SNMP trap manager IP address #2.  
SwitchTrapCommunity2  
SNMP community associated with trap manager IP  
address #2.  
SwitchTrapRcvr3  
SNMP trap manager IP address #3.  
SwitchTrapCommunity3  
SNMP community associated with trap manager IP  
address #3.  
SwitchTrapRcvr4  
SNMP trap manager IP address #4.  
SwitchTrapCommunity4  
SNMP community associated with trap manager IP  
address #4.  
SwitchPortMirroringStatus  
Enable/disable port mirroring operation of the  
switch.  
continued on next page  
9032579-03  
SNMP Management 67  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Table 5-2 Switch Information Variables (continued)  
Description  
Variable  
SwitchMirroredPort  
SwitchMirroringPort  
SwitchXmitMirrorEnable  
SwitchRcvMirrorEnable  
SwitchVlanEnable  
Port to be mirrored from.  
Port to be mirroring to.  
Enable/disable mirroring of transmitted traffic.  
Enable/disable mirroring of received traffic.  
Enable/disable global VLAN operation of the  
switch.  
SwitchVlanConfigTable  
SwitchVlanId  
Table indexed by SwitchVlanId  
VLAN number or ID.  
SwitchVlanName  
SwitchVlanPorts  
SwitchVlanStatus  
Text string for VLAN name.  
Ports in the VLAN.  
Variable used to add or delete entries from the  
VlanConfigTable.  
SwitchVlanEgressPorts  
SwitchVlanStatus  
Ports to which traffic destined for this VLAN may  
be transmitted.  
Variable used to add or delete entries from the  
VlanConfigTable.  
SwitchVlanPortTable  
SwitchVlanPortId  
SwitchVlanPvid  
Table indexed by SwitchVlanPortId.  
Port number or ID.  
Port VLAN ID (PVID) for this port.  
SwitchVlanPortType  
The type of VLAN this port is operating as, either  
hybrid or access.  
SwitchPriorityEnable  
Enable/disable global traffic priority in the  
switch.  
SwitchPriorityThreshold  
Priority threshold level (0-7) in the switch which  
defines switch traffic to be high or low priority.  
SwitchPriorityPortTable  
SwitchPriorityPortId  
SwitchPriorityDefault  
Priority table indexed by SwitchPriorityPortId.  
Port number or ID.  
Priority level (0-7) assigned to untagged traffic  
entering the associated port.  
68 SNMP Management  
ELS100-24TX  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Table 5-3. Port Variables  
Variable  
Description  
PortId  
Port number or ID.  
Link status of the port.  
PortStatus  
PortDuplexStatus  
Full/half duplex setting of the port. Not configurable  
if auto-negotiation is enabled.  
PortName  
PortEnable  
PortSpeed  
Text name assigned to the port.  
Enable/disable status of the port.  
Speed the port is operating at. Not configurable if  
auto-negotiation is enabled.  
PortAutonegEnable  
Enable/disable auto-negotiation on the port.  
Enable/disable flow control on the port.  
PortFlowControlEnable  
Compiling MIB Extensions: Cabletron Website  
The MIBs supported by the ELS100-24TX switch must be compiled into  
the SNMP network management platform before the switch can be  
managed. The supported MIBs are available using Cabletron’s website  
at:  
http://www.cabletron.com  
The four standard MIB specifications listed above with which the  
ELS100-24TX switch is compliant are generally available with the SNMP  
management platform.  
Application modules specific to managing the ELS100-24TX switch under  
different network management platforms are available. Contact Cabletron  
Systems for information regarding supported platforms.  
9032579-03  
SNMP Management 69  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Download from Www.Somanuals.com. All Manuals Search And Download.  
APPENDIX A. TECHNICAL SPECIFICATIONS  
General  
Standards Compliance  
IEEE 802.1D Transparent Bridging Specifications (ISO/IEC 10038)  
IEEE 802.1p Traffic Class Expediting and Dynamic Multicast Filtering  
IEEE 802.1Q Virtual Bridged Local Area Networks  
IEEE 802.2 Local Area Networks, Logical Link Control (LLC)  
IEEE 802.3 CSMA/CD 9 (ISO/IEC 8802-3)  
IEEE 802.3i 10Base-T (ISO/IEC 8802-3, clause 14)  
IEEE 802.3u 100Base-TX (ISO/IEC 8802-3, clause 25)  
IEEE 802.3x Flow Control  
EIA RS-232C (DTE-to-DCE)  
EIA RS-310C (19” rackmount)  
Certification  
Emissions: FCC Part 15, Subparts A and B, Class A; EN55022  
(CISPR 22), Class A  
Safety: UL 1950, cUL CSA 22.2-950, EN60950 (TUV)  
CE Mark: 89/336/EEC; 93/68/EEC; 73/23/EEC  
Immunity: IEC 801-2; IEC 801-3; IEC 801-4  
Data Rate  
10 Mbps Manchester encoded or 100 Mbps 4B/5B encoded  
Environmental Specifications  
Operating temperature:  
Operating humidity:  
Storage temperature:  
Storage humidity:  
32° to 113° F ( 0° C to 45° C)  
5 to 95% relative, non-condensing  
-22° to 158°F (-30° C to 70° C)  
5 to 95% relative, non-condensing  
9032579-03  
Technical Specifications 71  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Electrical Specifications  
Input voltage:  
100-240 VAC  
50-60 Hz  
75 VA  
Input frequency:  
Maximum power consumption:  
Physical  
Height:  
Length:  
Width:  
1.75 in. (4.4 cm)  
16.0 in. (40.6 cm)  
17.1 in. (43.4 cm mountable in a  
standard 19 in. rack)  
Weight:  
10.5 lb. (4.8 kg)  
Microprocessor  
Type:  
Intel i960J series, 32 bit  
33 MHz  
Speed:  
Memory  
Processor DRAM:  
Packet Buffer Memory:  
Flash Memory:  
4 MB  
4 MB/8 ports  
2 MB  
72 Technical Specifications  
ELS100-24TX  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Port Specifications  
Console Port  
Table A-1 shows the console port pin assignments.  
Table A-1. RS-232 Console Port Pin Assignments  
Pin  
1
Signal Name  
RTS/CTS  
TXD  
2
3
RXD  
4
DSR  
5
Ground  
DTR  
6
7
DCD  
8
DCD  
9
Not used  
10Base-T and 100Base-TX Ports  
The ELS100-24TX switch provides IEEE 802.3u auto-negotiation on its  
10Base-T/100Base-TX ports for 10/100 speed and full/half duplex  
operation. Table A-2 shows the 10Base-T/100Base-TX pinouts. These  
ports are wired MDI-X. All undefined pins are not used.  
Table A-2. 10Base-T/100Base-TX Pinouts  
Pin  
1
MDI-X Signal Name  
RD+  
RD-  
TD+  
TD-  
2
3
6
9032579-03  
Technical Specifications 73  
Download from Www.Somanuals.com. All Manuals Search And Download.  
MDI/MDI-X Crossover Cable Wiring  
Figure A-1 shows the wiring scheme for implementing a crossover cable  
if needed for connection to the switch’s 10Base-T or 100Base-TX ports.  
Such a cable may be required when connecting the switch to another  
switch or a hub device.  
Figure A-1. External Crossover Cable Wiring  
74 Technical Specifications  
ELS100-24TX  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Power Cord Set Requirements  
The wide-range input feature of the ELS100-24TX Ethernet switch  
permits it to operate from any line voltage between 100 and 120 or 200  
and 240 VAC.  
The power cord set (appliance coupler, flexible cord, and wall plug) you  
received with the switch meets the requirements for use in the country  
where you purchased the switch.  
Power cord sets for use in other countries must meet the requirements of  
the country where you use the switch. For more information on power  
cord set requirements, contact your Cabletron Systems Support  
Representative.  
General Requirements  
The requirements listed below are applicable to all countries:  
The length of the power cord set must be at least 5.00 feet (1.5 m)  
and a maximum of 6.56 feet (2.0 m).  
All power cord sets must be approved by an acceptable accredited  
agency responsible for evaluation in the country where the power  
cord set will be used.  
The power cord set must have a minimum current capacity of 10A  
and a nominal voltage rating of 125 or 250 VAC, as required by each  
country’s power system.  
The appliance coupler must meet the mechanical configuration of an  
EN 60 320/IEC 320 Standard Sheet C13 connector for mating with  
appliance inlet on the switch.  
Country-Specific Requirements  
Table A-3 lists the power cord set requirements by country and identifies  
the accredited agency within that country.  
9032579-03  
Technical Specifications 75  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Table A-1. Power Cord Set Requirements by Country  
Country  
Australia  
Austria  
Accredited Agency  
EANSW  
OVE  
See Notes *  
1
1
1
2
1
1
1
1
1
3
1
1
1
1
1
2
Belgium  
CEBC  
CSA  
Canada  
Denmark  
Finland  
DEMKO  
FIMKO  
UTE  
France  
Germany  
Italy  
VDE  
IMQ  
Japan  
JIS  
Netherlands  
Norway  
KEMA  
NEMKO  
SEMKO  
SEV  
Sweden  
Switzerland  
United Kingdom  
United States  
BSI  
UL  
The note column includes a number. Associate this number  
with the corresponding notes listed after the table to obtain  
specific power standards and requirements.  
Note 1  
Flexible cord must be <HAR> Type HO5VV-F or HO3VV-F, 3-conductor,  
1.0 mm2, or 0.75 mm2 conductor size. Power cord set fittings (appliance  
coupler and wall plug) must bear the certification mark of the agency  
responsible for evaluation in the country where it will be used.  
Note 2  
Flexible cord must be Type SV, SJ, SPT or equivalent, No. 18 AWG,  
3-conductor. Wall plug must be a two-pole grounding type with a NEMA  
5-15P (15A, 125V) or NEMA 6-15P (15A 250V) configuration.  
Note 3  
Appliance coupler, flexible cord, and wall plug must bear a "T" mark and  
registration number in accordance with the Japanese Dentori Law.  
Flexible cord must be Type VCT or VCTF, 3-conductor, 0.75mm2  
conductor size. Wall plug must be a two-pole grounding type with a  
Japanese Industrial Standard C8303 (15A, 125V) configuration.  
76 Technical Specifications  
ELS100-24TX  
Download from Www.Somanuals.com. All Manuals Search And Download.  
APPENDIX B. SPANNING TREE CONCEPTS  
General  
The IEEE 802.1D Spanning Tree Protocol resolves the problems of  
physical loops in a network by establishing one primary path between any  
two switches in a network. Any duplicate paths are barred from use and  
become standby or blocked paths until the original path fails, at which  
point they can be brought into service.  
Spanning Tree Features  
The ELS100-24TX switch meets the requirements of the Spanning Tree  
Protocol (STP) by performing the following functions:  
Creates a single spanning tree from any arrangement of switching or  
bridging elements.  
The term “switch” is used as an equivalent to  
“bridge” in this document.  
Compensates automatically for the failure, removal, or addition of  
any device in an active data path.  
Achieves port changes in short time intervals, which establishes a  
stable active topology quickly with a minimum of network  
disturbance.  
Uses a minimum amount of communications bandwidth to  
accomplish the operation of the Spanning Tree Protocol.  
Reconfigures the active topology in a manner that is transparent to  
stations transmitting and receiving data packets.  
Manages the topology in a consistent and reproducible manner  
through the use of Spanning Tree Protocol parameters.  
9032579-03  
Spanning Tree Concepts 77  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Spanning Tree Protocol in a Network  
Figure B-1 illustrates the use of three ELS100-24TX switches to establish  
an effective Spanning Tree configuration. Switches A, B and C are  
connected together in a redundant topology (more than one path between  
two points). If the connection between A and B goes down, the link  
between A and C becomes active, thereby establishing a path between A  
and B through switch C. Additionally, if the connection between B and C  
goes down, the link between A and C becomes active, establishing a path  
between B and C through switch A.  
Figure B-1. Spanning Tree Using ELS100-24TX Switches  
Spanning Tree Protocol Parameters  
Several configuration parameters control the operation of the Spanning  
Tree Protocol. Table B-1 describes the parameters and lists the  
ELS100-24TX switch default settings for each parameter.  
You can cause serious network performance degradation  
if you do not fully understand Spanning Tree concepts.  
Be sure to consult personnel experienced with this  
process prior to configuring Spanning Tree parameters.  
78 Spanning Tree Concepts  
ELS100-24TX  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Table B-1. Spanning Tree Protocol Defaults  
Description  
Parameter  
Default Value  
Bridge  
Group  
Unique MAC group address, recognized by all bridges  
in the network.  
Address  
Bridge  
Identifier  
Identifier for each bridge. This parameter consists of  
two parts: a 16-bit bridge priority and a 48-bit network  
adapter address. Ports are numbered in absolute  
numbers starting from 1 regardless of their bridge  
attachment. The network adapter address is the same  
address as the first port of the bridge.  
32768 (bridge  
priority)  
Port  
Identifier  
Identifies each port of each bridge, with an incremen-  
tal default value given for each port.  
Port 1 -32768  
Port 2 -32769  
Port 3 -32770  
Port 4 -32771  
Port 5 -32772  
Port 6 -32773  
Port 7 -32774  
Port 8 -32775  
Port 9 -32776  
Port 10 -32777  
Port 11 -32778  
Port 12 -32779  
Port 13 -32780  
Port 14 -32781  
Port 15 -32782  
Port 16 -32783  
Port 17 -32784  
Port 18 -32785  
Port 19 -32786  
Port 20 -32787  
Port 21 -32788  
Port 22 -32789  
Port 23 -32790  
Port 24 -32791  
Port Priority  
Indicates the priority of a specific port in relation to  
other ports.  
128  
10  
Cost  
Component  
of Each Port  
The Spanning Tree Protocol calculates and ensures  
that an active topology generates minimal cost paths.  
A value of 100 is generally used for 10Mbps Ethernet  
networks and a value of 10 is generally used for  
100Mbps Ethernet networks.  
For detailed information on the operation of the Spanning Tree Protocol,  
consult Section 4 of IEEE Standard 802.1D, ISO/IEC 10038:1993.  
Spanning Tree Protocol Operation  
When the Spanning Tree Protocol is enabled for the first time or when  
there is a change in the network topology, such as a failure or the addition  
or removal of a component, the Spanning Tree Protocol automatically  
sets up the active topology of the current network.  
9032579-03  
Spanning Tree Concepts 79  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Communicating Between Bridges  
Periodically, all devices running the Spanning Tree Protocol on a network  
transmit packets to each other “in care of” the Bridge Group Address  
which all bridges share. When a bridge receives a frame sent to the  
Bridge Group Address, the bridge’s Spanning Tree Protocol processes  
the packet. Application software and other LAN segments ignore the  
packet. Bridges communicate between each other in order to determine  
the Root Bridge.  
Selecting a Root Bridge and Designated Bridges  
During communication between bridges, one bridge is determined to  
have the lowest bridge identifier. This bridge becomes the Root Bridge.  
After the Root Bridge has been selected, each LAN segment looks for the  
bridge that has the lowest cost relative to the Root Bridge. These bridges  
become Designated Bridges.  
Selecting Designated Ports  
Each Designated Bridge selects a Designated Port. This port is  
responsible for forwarding packets to the Root Bridge.  
Handling Duplicate Paths  
When the active topology of the network is determined, all packets  
between any two nodes in the network use only one path. Where a  
duplicate path exists, the non-designated port is put into a blocking state.  
Remapping Network Topology  
If there is a change in the network topology due to a failure or the removal  
or addition of any active components, the active topology also changes.  
This may trigger a change in the state of some blocked ports.  
There are five (5) states that the ports can be in for spanning tree:  
Blocking: A port in this state does not participate in the transmission  
of frames, thus preventing duplication arising through multiple paths  
existing in the active topology of the bridged LAN.  
Listening: A port in this state is preparing to participate in the  
transmission of frames. The transmission of frames is temporarily  
disabled in order to prevent temporary loops, which may occur in a  
bridged LAN during the lifetime of this state as the active topology of  
the bridged LAN changes.  
Learning: A port in this state is preparing to participate in the  
transmission of frames.  
Forwarding: A port in this state is participating in the transmission of  
frames.  
Disabled: A port in this state does not participate in the transmission  
of frames or the operation of the spanning tree process.  
80 Spanning Tree Concepts  
ELS100-24TX  
Download from Www.Somanuals.com. All Manuals Search And Download.  
APPENDIX C. FLOW CONTROL  
Flow control is a mechanism which allows you to protect the switch from  
overload conditions and to keep additional traffic off the network when  
excessive congestion will result. Figure C-1 illustrates flow control for  
both half and full duplex applications.  
Figure C-1. Flow Control for Full and  
Half Duplex Applications  
Each port of the switch has a transmit queue which buffers frames to be  
sent out on that port. In this example, large amounts of data are being  
sent from Workstation A (connected to port X) and other ports on the  
switch to Workstation B (connected to port Y).The queue on port Y starts  
filling up with data until it reaches a determined threshold. The packet  
which causes the threshold to be exceeded triggers the Flow Control  
function on the port from which the packet entered the switch, in this case  
port X.  
Since port X is configured with Flow Control set to Enabled, the switch  
responds by initiating a pause frame (full duplex applications) or back-  
pressure mechanism (half duplex applications). The pause frame causes  
Workstation A to stop sending packets. After a certain amount of time has  
elapsed, determined by a value in the pause frame, Workstation A will  
resume sending data. Similarly, the back-pressure mechanism forces  
Workstation A to stop sending packets by inducing collisions on port X.  
9032579-03  
Flow Control 81  
Download from Www.Somanuals.com. All Manuals Search And Download.  
The pause frame flow control mechanism supported by the ELS100-24TX  
switch conforms with the IEEE 802.3x specification for full duplex flow  
control.  
The ELS100-24TX Port Statistics Screen indicates the number of pause  
frames that have been sent, indicating the number of times full duplex flow  
control has occurred. For the full duplex pause frame mechanism to work,  
the device connected to the switch port must also support IEEE 802.3x  
flow control. Flow Control is configurable per port in the Port Configuration  
Menu of the console menu or via SNMP.  
82 Flow Control  
ELS100-24TX  
Download from Www.Somanuals.com. All Manuals Search And Download.  
APPENDIX D. VIRTUAL LANS (VLANS)  
VLANs and Frame Tagging  
The ELS100-24TX supports IEEE 802.1Q-compliant virtual LANs  
(VLANs). This capability provides a highly efficient architecture for  
establishing VLANs within a network and for controlling broadcast/  
multicast traffic between workgroups. Central to this capability is an  
explicit frame tagging approach for carrying VLAN information between  
interconnected network devices.  
With frame tagging, a four byte data tag field is appended to frames that  
cross the network. The tag identifies which VLAN the frame belongs to.  
The tag may be added to the frame by the end station itself or by a  
network device, such as a switch. In addition to VLAN information, the  
relative priority of the frame in the network can specified by the tag (see  
Appendix E, “Class of Service”).  
In the example in Figure D-1 below, the workstations attached to the top  
switch are members of the same two VLANs as the workstations attached  
to the bottom switch. The 802.1Q tags are used to carry VLAN information  
in the frames traveling between the two switches.  
Figure D-1. Two Switch VLAN Configuration  
9032579-03  
Virtual LANs (VLANs) 83  
Download from Www.Somanuals.com. All Manuals Search And Download.  
If the ELS100-24TX is so configured, and, if the frame does not already  
contain a tag, a VLAN identifier is placed in a tag which is appended to  
frames as they are received by the switch. Within the switch and between  
switches compliant with IEEE 802.1Q, these identifiers are used to control  
the destination of broadcast frames, preventing them from being flooded  
to all connected stations and interfaces. When frames are forwarded back  
to destination end stations, the tag may or may not be stripped off,  
depending on the configuration of the end station and the switch port.  
By using 802.1Q tagged VLANs, users from physically dispersed  
locations can be formed into groups by assigning them to specific VLANs.  
Broadcast and multicast traffic for these specific VLANs can be directed  
across the network without being radiated out to stations that are not  
members of the same VLANs. Up to 4094 different VLANs can be  
specified by the 802.1Q tag, thus permitting the configuration of up to  
4094 virtual workgroups. This implementation is nonintrusive to end-  
station applications and the associated clients.  
ELS100-24TX VLAN Configuration  
VLAN operation on the ELS100-24TX is disabled by default. When  
VLANs are enabled, all frames are transferred internally through the  
switch with a VLAN tag. This tag may already be on the frame entering  
the switch, or added to the frame by the switch. VLAN information already  
existing on frames entering the switch is automatically handled by the  
switch. The ELS100-24TX learns VLAN information from tagged frames  
and appropriately switches frames out the proper ports based on this  
information. The configuration of VLANs for frames entering the switch  
without tags must be made by the user of the switch. This configuration  
can be made either through the VLAN Menu in the console interface or  
via SNMP. The parameters used to configure VLANs on the ELS100-  
24TX are explained below.  
VLAN ID  
The VLAN ID is used to uniquely identify different VLANs on a network.  
The VLAN ID information is contained in the 802.1Q tag header on a  
frame, and so identifies the VLAN to which a frame belongs. The ELS100-  
24TX recognizes VLAN IDs in the tags on frames entering the switch, and  
can also add tags with an appropriate VLAN ID to untagged frames.  
Ports in VLAN  
When configuring VLANs on the ELS100-24TX, individual ports are  
assigned to specific VLANs by setting the Port VLAN ID (PVID) for each  
port. Frames entering the switch which are untagged are automatically  
assigned a VLAN ID by the switch based on the PVID of the incoming  
port. The Ports in VLAN parameter makes the assignment of ports to  
PVIDs. An individual port can only be assigned to a single PVID with this  
parameter.  
84 Virtual LANs (VLANs)  
ELS100-24TX  
Download from Www.Somanuals.com. All Manuals Search And Download.  
VLAN Egress Ports  
The VLAN Egress Ports parameter is used to assign ports to a VLAN for  
carrying VLAN tagged frames across a network. The assignment of  
egress ports does not affect the assignment of VLAN IDs to frames  
entering the switch. However, frames exiting the switch may be sent out  
the egress ports configured for a specific VLAN ID. Frames exiting the  
switch via egress ports for a given VLAN are normally tagged.  
VLAN Access Ports  
Individual ELS100-24TX ports can be configured as one of two types for  
the purpose of VLAN configuration: Access or Hybrid. A VLAN Access  
port is used to connect one or more VLAN-unaware devices to the switch.  
VLAN tagged frames are not allowed to enter or exit an Access port. If a  
tagged frame enters the switch on an Access port, the switch will drop the  
frame. End-user stations which do not support 802.1Q tags should be  
attached to ports on the switch configured as Access ports.  
In Example 1 in Figure D-2, both ports are designated as Access ports.  
The ports are both configured to be on VLAN X. An untagged frame (1)  
comes in through the left port and gets tagged with a VLAN X tag (2),  
based on the incoming port PVID. As the frame exits through the right  
port, the tag is stripped (3) since the outgoing port is an Access port as  
well and can only transmit untagged frames. The frame can propagate  
through the switch in this example only because both ports are on the  
same VLAN.  
In Example 2 in Figure D-2, both ports are also Access ports, however the  
port on the left is on VLAN X while the port on the right on VLAN Y. The  
untagged frame (1) comes in through the left port and again gets tagged  
with a VLAN X tag (2). However, because the outgoing port is on a  
different VLAN (VLAN Y), the frame is dropped. In general, frames cannot  
propagate between ports unless both ports belong to the same VLAN.  
Figure D-2. VLAN Access Ports  
9032579-03  
Virtual LANs (VLANs) 85  
Download from Www.Somanuals.com. All Manuals Search And Download.  
VLAN Hybrid Ports  
A VLAN Hybrid port is used to connect one or more VLAN-aware or  
VLAN-unaware devices to the switch. Both tagged and untagged frames  
can be received and transmitted on Hybrid ports. Egress ports should  
typically be configured as Hybrid ports.  
When a frame with an unlearned source MAC address enters a Hybrid  
port, the learning of that address and its associated VLAN is dependent  
on whether the frame is tagged or not. If the frame is untagged, its source  
MAC address is learned as a non-tagging station, with a VLAN ID equal  
to the input port PVID. All frames subsequently sent to that MAC address  
from this Hybrid port will be untagged. If the frame is tagged, its source  
MAC address is learned as a tagging station, with a VLAN ID equal to the  
value of the VLAN ID in the tag. All frames subsequently sent to that MAC  
address from this Hybrid port will be tagged with that same VLAN ID.  
In Example 1 in Figure D-3A, two ports are configured with two different  
PVIDs, X and Y. A frame arrives (1) with a tag for VLAN Z. If the  
destination MAC address of that frame has already been learned on the  
destination port as a tagged station with the same VLAN ID of Z, the frame  
is sent out that port (3) with the VLAN Z tag still appended to it. If the  
address has not been learned with the VLAN ID of Z on the destination  
port, the frame is dropped.  
In Example 2 in Figure D-3A, a similar scenario to Example 1 occurs,  
except that the incoming frame (1) is tagged with a VLAN Y tag. The frame  
is being sent (2) to a port that belongs to VLAN Y. In this case, the  
decision to append a VLAN Y tag or not to the outgoing frame depends  
on whether the destination MAC address has been learned as a tagged  
or as an untagged station. In this example, it was learned as an untagged  
station, so the frame is sent out without a tag (3).  
Z
Y
Identifiers  
2
2
X,Y, Z = VLAN  
H = Hybrid  
Port  
H
H
H
H
X
Y
X
Y
Z
Y
3
3
1
1
Z
Example 1  
Example 2  
Z
Figure D-3A. VLAN Hybrid Ports (Examples 1 and 2)  
86 Virtual LANs (VLANs)  
ELS100-24TX  
Download from Www.Somanuals.com. All Manuals Search And Download.  
In Example 3 in Figure D-3B, an untagged frame arrives at the left port  
(1). The switch tags the frame with the PVID for VLAN X (2). Since the  
destination MAC address has already been learned as a tagged station  
on VLAN X on the outgoing port, the frame is sent out with a VLAN X tag.  
Example 4 in Figure D-3B is similar to Example 3 except that both ports  
(incoming and outgoing) have a VLAN X PVID. The untagged frame  
arrives at the incoming port (1) and gets tagged with a VLAN X tag (2).  
The tag may or may not be stripped off as the frame exits the switch,  
depending on how the MAC address of the destination device was  
learned (3). In this example, the destination was learned as an untagged  
station so the tag is stripped. This Hybrid port example is thus essentially  
the same as the Access port case in Figure D-2, Example 1.  
When sending broadcast or unknown DA unicast frames  
out a Hybrid port, the frames are always tagged. The  
VLAN ID of the tag is identical to the VLAN ID that was as-  
signed to the frame when it entered the switch on the  
source port.  
Figure D-3B. VLAN Hybrid Ports (Examples 3 and 4)  
9032579-03  
Virtual LANs (VLANs) 87  
Download from Www.Somanuals.com. All Manuals Search And Download.  
VLAN Application Example  
A network administrator can use VLANs to define user groups regardless  
of the physical LAN segment to which they are connected. The use of  
Hybrid and Access links can further refine traffic flow in a multi-switch  
environment. Figure D-4 shows the combination of both Hybrid and  
Access links used in a network with three different VLANs. Workstations  
are typically connected to the ELS100-24TX via Access links. On the  
internal corporate network (backbone), VLAN tags are used to identify the  
VLAN association of frames.  
It is possible to mix VLAN-aware and VLAN-unaware de-  
vices on the same Hybrid switch port. However, this is not  
recommended design practice.  
Figure D-4. VLAN Application Example  
88 Virtual LANs (VLANs)  
ELS100-24TX  
Download from Www.Somanuals.com. All Manuals Search And Download.  
APPENDIX E. CLASS OF SERVICE  
Class of Service support on the ELS100-24TX allows you to assign  
mission-critical data a higher priority through the switch by delaying less  
critical traffic during periods of congestion. Higher priority traffic through  
the switch is serviced first before lower priority traffic. The Class of  
Service capability of the ELS100-24TX switch is implemented by a priority  
queuing mechanism. Class of Service is based on the IEEE 802.1p draft  
standard specification and allows you to define two priorities of traffic on  
each switch port:  
high  
normal  
As traffic enters the switch, it is assigned to one of the two priority levels  
according to information located in the 802.1Q header tag of the frame  
(see Appendix D, “Virtual LANs”) or according to the incoming port  
number. Frames are then placed into one of two transmit queues on the  
outbound switch port based on their priority level. Frames on the high  
priority queue are transmitted first; when that queue empties, traffic on the  
normal priority queue is transmitted. When priority queuing is being used,  
each frame that passes through the switch contains a priority level in its  
header tag. The priority information may already exist in incoming frames,  
or be assigned by the switch. The determination of individual frame  
priority is based on the following rules:  
1. Incoming tagged frames contain a priority level (range: 0-7)  
2. Incoming non-tagged frames are assigned a preconfigured default  
priority level based on their incoming port (range: 0-7). The  
assignment of priority per port is done via management using the  
Port Priority Default parameter.  
3. Priority levels of frames are compared against a reconfigured global  
priority threshold setting, configured via management using the  
Priority Threshold parameter. Those frames with levels equal to or  
above the threshold are designated high priority traffic; those frames  
with levels below the threshold are designated normal priority traffic.  
The default setting for the threshold parameter is: 4 and above = High  
Priority, 3 and below = Normal Priority.  
Properly configured, the Class of Service mechanism assures that during  
congestion, the highest priority data does not get delayed by normal  
priority traffic. The tagged header in the frame governs individual frame  
priority.  
9032579-03  
Class Of Service 89  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Figure E-1 shows priority queuing operating within a switch. Frames  
entering the switch through ports 1 and 4 are tagged as normal traffic and  
placed in a normal priority queue on the outbound port. Frames entering  
through ports 2 and 5 are tagged as high priority traffic and placed in a  
high priority queue on the outbound port. Priority queuing can be  
configured using the Class of Service Configuration Menu in the console  
interface or via SNMP.  
Figure E-1. Class of Service Example  
90 Class Of Service  
ELS100-24TX  
Download from Www.Somanuals.com. All Manuals Search And Download.  
APPENDIX F. ACRONYMS & ABBREVIATIONS  
Term  
Definition  
10Base-T  
100Base-TX  
ANSI  
10 Mbps twisted-pair Ethernet  
100Mbps twisted-pair Ethernet  
American National Standards Institute  
Application Specific Integrated Circuit  
Bootstrap Protocol  
ASIC  
BootP  
BPDU  
Bridge Protocol Data Unit  
Category 5  
CAT5  
CoS  
Class of Service  
CRC  
Cyclic Redundancy Check  
CSMA/CD  
Carrier Sense Multiple Access/Collision  
Detection  
DCE  
Data Communications Equipment  
(modem)  
DHCP  
DSR  
DTE  
Dynamic Host Configuration Protocol  
Data Send Ready  
Data Terminal Equipment  
Data Terminal Ready  
DTR  
ICMP  
IEEE  
Internet Control Message Protocol  
Institute of Electrical and Electronics  
Engineers  
IP  
Internet Protocol  
LAN  
MAC  
LED  
MDI  
Local Area Network  
Media Access Control  
Light Emitting Diode  
Media Device Interface  
Management Information Base  
Port VLAN ID  
MIB  
PVID  
RFC  
RMON  
Request for Comment  
Remote Monitoring  
9032579-03  
Acronyms & Abbreviations 91  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Term  
RXD  
Definition  
Receive Data  
SNMP  
STP  
Simple Network Management Protocol  
Spanning Tree Protocol  
Transmission Control Protocol/Internet Protocol  
Trivial File Transfer Protocol  
Transmit Data  
TCP/IP  
TFTP  
TXD  
UTP  
Unshielded Twisted Pair  
Virtual Local Area Network  
Wide Area Network  
VLAN  
WAN  
92 Acronyms & Abbreviations  
ELS100-24TX  
Download from Www.Somanuals.com. All Manuals Search And Download.  
INDEX  
10Base-T/100Base-TX pinouts, 73  
10Base-TX/100Base-TX ports, 20  
802.1D  
Spanning Tree Protocol, 56, 77  
802.1D Bridge, 6  
D
Data Rate, 71  
Default Gateway, 26  
setting, 61  
designated bridges, 80  
Download Software Menu, 25, 48  
downloading a software upgrade, 7, 55,  
56  
802.1p, 89  
802.1Q, 84  
802.3x, 82  
downloading via TFTP, 56  
downloading via the serial port, 55  
DTE connection, 17  
A
architecture, 2  
auto-negotiation, 8, 41, 42  
configuring, 59  
dynamic MAC addresses, 59  
E
B
Electrical Specifications, 72  
Environmental Specifications, 71  
base MAC address, 47  
BootP/DHCP, 9  
configuring, 61  
F
bridge, 79, 80  
factory defaults, 23  
fan outlets, 5  
features, 1  
flow control, 10, 81, 82  
802.3x, 82  
forward delay, 32  
Forwarding Table, 6, 29  
configuring, 59  
communicating between bridges,  
80  
priority, 32  
broadcast throttling, 9  
configuring, 60  
C
Forwarding Table Configuration Menu,  
29  
frame tagging, 10, 83  
front panel, 3  
front panel components, 3  
full duplex mode, 9  
cable  
RS-232, 17  
Certification, 71  
Class of Service, 10, 89, 90  
802.1p, 89  
configuring, 58  
Class of Service Configuration Menu, 39  
client/server network application, 11  
communication settings, 17  
community names, 27, 53  
configuring the switch  
common tasks, 51  
connecting network cables, 20  
console port, 3, 17, 73  
connecting to, 17  
G
General Information Screen, 25, 47  
H
Hello Time, 32  
defined, 3  
I
pin assignments, 73  
cost component of each port, 79  
crossover cable, 20  
cut-through, 6  
inspecting your shipment, 13  
IP address  
assigning, 52  
9032579-03  
Index 93  
Download from Www.Somanuals.com. All Manuals Search And Download.  
power connector, 5  
power cord, 18  
power cord set requirements, 75  
power LED, 3  
defined, 3  
power source, 13  
L
LED mode button, 3, 4, 5  
defined, 3  
LEDs, 4, 5, 9  
local backbone application, 12  
login, 22  
logout, 25, 49  
power switch, 5  
powering the switch, 18  
power-up count, 47  
power-up tests, 18, 19  
Priority Default, 40, 58, 89  
Priority Threshold, 39, 58, 89  
M
MAC addresses, 59  
Main Menu, 21, 25  
max age, 32  
MDI/MDI-X crossover cable wiring, 74, 75  
MDI-X, 20  
R
rear panel, 5  
remapping network topology, 80  
Reset, 25, 50  
resetting the switch, 50  
Return to Default Configuration, 25, 49  
RJ-45 connectors, 20  
RMON, 8, 65  
Memory, 72  
menu hierarchy, 24  
MIB, 63, 64, 65, 66, 69  
MIB-II, 64  
Microprocessor, 72  
mirrored port, 28  
mirroring port, 28  
modes of access  
read-only and read/write, 22  
mounting ears, 15, 16  
Mounting the Switch, 14, 15, 16  
rack, 16  
Root Bridge, 80  
router, 26, 63  
S
Save Current Configuration, 25, 49  
screen timeout, 52  
serial number, 47  
table or shelf, 14  
wall, 15  
site requirements, 13  
SNMP, 7, 27, 53, 63, 64, 69  
setting access, 53  
SNMP Configuration Menu, 27  
software download  
N
network configuration status, 53  
non-volatile parameter storage, 7  
see downloading a software upgrade, 7  
software version, 47  
Spanning Tree, 6, 7, 78, 79  
Spanning Tree Configuration Menu, 31  
Spanning Tree Parameters  
configuring, 56  
Spanning Tree Port #n Configuration  
Menu, 34  
Spanning Tree Port Configuration Menu,  
33  
Spanning Tree Protocol  
defaults, 79  
Standards Compliance  
IEEE, 71  
store-and-forward, 6, 79, 92  
subnet mask, 52  
Switch Configuration Menu, 25, 28  
switch statistics, 54  
P
password protection, 7, 22, 52  
path cost, 33, 34  
performance, 2  
Physical Specifications, 72  
Port Configuration Menu, 42  
port LEDs, 4  
defined, 5  
Port Menu, 25, 41  
port mirroring, 8  
configuring, 54  
port operation  
configuring, 58  
port priority, 33  
menu, 40  
port specifications, 73  
port statistics screen, 45  
Switch Statistics Screen, 25, 43  
94 Index  
ELS100-24TX  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Switch Summary Screen, 44  
System Configuration Menu, 25, 26  
V
ventilation, 13  
VLAN #n Configuration Menu, 37  
VLAN Access ports, 38, 85  
VLAN application example, 88  
VLAN Configuration Menu, 35  
VLAN Egress ports, 36, 37, 85  
VLAN Hybrid ports, 38, 86, 87  
VLAN Menu, 36  
T
Telnet, 21  
connecting, 53  
terminal, 7, 17, 91  
Test LED, 19  
defined, 3  
VLAN Port Menu, 38  
VLANs, 10  
TFTP download, 56  
TFTP file name, 48  
802.1Q, 84  
configuring, 57  
VT100, 7  
U
Unshielded Twisted Pair (UTP), 20  
Up Time, 47  
User Access, 22  
W
workgroup hubs, 12  
9032579-03  
Index 95  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Download from Www.Somanuals.com. All Manuals Search And Download.  

Blanco Washer BFWM7 User Manual
Bontrager Automobile Parts Wheelset User Manual
Bosch Appliances Marine Radio D9112 User Manual
Boss Audio Systems Car Stereo System BV8966B User Manual
Bowers Wilkins Speaker 1 Series2 User Manual
Bowers Wilkins Speaker Signature HTM User Manual
Brother Sewing Machine 885 V32 User Manual
Brother Sewing Machine 3034D User Manual
Carrier Furnace 58VLR User Manual
Cisco Systems IP Phone 8941 User Manual