Cabletron Systems ELS100-24TXM User Manual

SmartSTACK 100

ELS100-24TXM

ETHERNET SWITCH

INSTALLATION

AND

USER GUIDE

Only qualified personnel should perform installation procedures.

NOTICE

Cabletron Systems reserves the right to make changes in specifications and other information contained in this document without prior notice. The reader should in all cases consult Cabletron Systems to determine whether any such changes have been made.

The hardware, firmware, or software described in this manual is subject to change without notice.

IN NO EVENT SHALL CABLETRON SYSTEMS BE LIABLE FOR ANY INCIDENTAL, INDIRECT, SPECIAL, OR CONSEQUENTIAL DAMAGES WHATSOEVER (INCLUDING BUT NOT LIMITED TO LOST PROFITS) ARISING OUT OF OR RELATED TO THIS MANUAL OR THE INFORMATION CONTAINED IN IT, EVEN IF CABLETRON SYS TEMS HAS BEEN ADVISED OF, KNOWN, OR SHOULD HAVE KNOWN, THE POSSIBILITY OF SUCH DAMAGES.

© Copyright 1998 by Cabletron Systems, Inc., P.O. Box 5005, Rochester, NH 03866-5005 All Rights Reserved Printed in the United States of America Part Number: 9032785 September 1998 ELS100-24TX is a trademark of Cabletron Systems, Inc.

All other product names mentioned in this manual may be trademarks or registered trademarks of their respective companies.

FCC NOTICE

This device complies wit h Part 15 of the F CC ru les. Oper atio n is subje ct to the fo llo wing two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.

NOTE: This equipme nt has been tested and fo und to compl y with the l imits for a Class A digital device, pursuant to Part 15 of the FCC rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment. Th is equipment uses, generates, and can radiate radio frequency energy and if not installed in accordance with the operator’s manual, may cause harmful interference to radio communications. Operation of this equipment in a residential area is likely to cause interfer ence in wh ich case th e user w ill be re quired to correct t he interf erence at his own expense.

WARNING: Changes or mo difications made to th is device which ar e not ex pressly appro ved by the party responsible for compliance could void the user’s authority to operate the equip-

ment.

Printed on Recycled Paper

DOC NOTICE

This digital apparatus do es no t exce ed the C lass A l imit s for radi o no is e emi ssion s f rom d igital 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 prod uct base d on t he stan dard of the Vo luntar y Con trol Cou ncil fo r Inte rfer 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

IMPORTANT: Before utilizing this product, carefully read this License Agreement.

This document is an agreement between you, the end user, and Cabletron Systems, Inc. (“Cabletron”) that sets for th your rights and obl igations with respect to the C abletron software program (the “Program”) contai ned in this package. The Program may be contained in firmware, chips or other media. BY UTILIZING THE ENCLOSED PRODUCT, YOU ARE AGREEING TO BECOME BOUND BY THE TERMS OF THIS AGREEMENT, WHICH INCLUDES THE LICENSE AND THE LIMITATION OF W ARR ANTY AN D D ISCL AIM ER OF LI ABI LITY. 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 provide d in this package subject to the terms and conditions of this Licens e 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 ble the Progra m.

3. APPLICABLE LAW under the laws an d i n th e state a nd fe der a l cou rt s of New Hampshire. You accept the personal jurisdiction and venue of the New Hampshire courts.

. You may not reverse engineer, decompile, or disassem-

. This License Agreement shall be interpreted and governed

EXCLUSION OF WARRANTY

AND DISCLAIMER OF LIABILITY

1. EXCLUSION OF WARRANTY. Except as may be spe ci fi call y p ro vided b y Cab l etron i n writing, Cabletron makes no warranty, expressed or implied, c oncerning 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 FITNESS FOR A PARTICULAR PURPOSE, WITH RESPECT TO THE PROGRAM, THE ACCOMPANYING WRITTEN MATERIALS, AND ANY ACCOMPANYING HA RDW AR E.

2. NO LIABILITY FOR CONSEQUENTIAL DAMAGES CABLETRON OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER (INCLUDING, WITHOUT LIMITATION, DAMAGES FOR LOSS OF BUSINESS, PROFITS, 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 POSSIBI LITY OF SUCH DA MAGES. BE CAUSE SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION 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.

. IN NO EVENT SHALL

UNITED STATES GOVERNMENT RESTRICTED RIGHTS

The enclosed product (a) was developed solely at private expense; (b) contains “restricted computer software” submitted with restricted right s in accordance with Section 522 27-19 (a) through (d) of th e Commerci al Comput er Softwar e - Restri cted Rights C lause and its successors, and (c) in all respects is proprietary data belonging to Cabletron and/or its suppliers.

For Department of Defense un its, th e prod uct is lice nsed wi th “Restr icted Rights” as defi ned 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 fo rth in subparagr aph (c) (1) (ii) of the Rights in Technical Data and Computer Software clause at 252.227-7013. Cabletron Systems, Inc., 35 Industrial Way, Rochester, 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 (under normal conditions) is - 12.6 dBm or 55 x 10

watts. Removing the optical connector from the transceiver allows laser radiation to emit

directly from the opti cal por t. T he ma ximum radia nce fr om th e opt ical port (under wo rst case

-2

conditions) is 0.8 W cm

Do not use opt ical instruments to view the lase r 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.

or 8 x 10 3 W m 2 sr-1.

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: Mr. J. Solari

European Represent ati ve Add r ess: 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 equipment packaged with this notice conforms to the above directives.

Manufacturer Legal Representative in Europe Mr. Ronald Fotino Full Name Full Name Principal Compliance Engineer Title Title Rochester, NH, USA Location Location

Newbury, Berkshire, England

Managing Director - E.M.E.A.

Mr. J. Solari

TABLE OF CONTENTS

PREFACE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Preface i

Purpose. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . i

Audience. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . i

Conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . i

Message Formats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . i

Keyboard Entries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ii

Other Conventions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ii

Organization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ii

1. PRODUCT OVERVIEW. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1

Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1

Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2

Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

Rear Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Feature Summaries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

IEEE 802.1D Bridge. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

Spanning Tree Protocol. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

Frame Buffering and Fram e Lat ency . . . . . . . . . . . . . . . . . . . . . . . . 7

Software Download . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

Non-volatile Parameter Storage . . . . . . . . . . . . . . . . . . . . . . . . . . .7

Configuration and Man agement Interfaces . . . . . . . . . . . . . . . . . . . 8

RMON . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8

Port Mirroring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

Auto-negotiation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Broadcast Thrott ling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

BootP/DHCP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

Full Duplex Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

Flow Control. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

Virtual LANs (VLANs) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

Class of Service. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

Application Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

Client/Server Network Application. . . . . . . . . . . . . . . . . . . . . . . . .12

Local Backbone Application. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13

2. INSTALLATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15

Inspecting Your Shipment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15

Site Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15

Mounting the Switch on a Table or Shelf . . . . . . . . . . . . . . . . . . . . . . .16

Mounting the Switch on a Wall . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17

Mounting the Switch in a Rack . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18

Installing a Fiber Uplink Module into the Switch . . . . . . . . . . . . . . . . . .19

Connecting a Terminal to t he Console Port . . . . . . . . . . . . . . . . . . . . . 20

Powering the Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21

Power-Up. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21

ELS100-24TXM Table of Contents i

Network Cable Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Copper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Fiber . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

10Base-T/100Base-TX Po r ts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

100Base-FX Fiber Port s. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Fiber Uplink Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

3. ELS100-24TXM USER INTERFACE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

User Access. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Factory Defaults. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Menu Hierarchy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Main Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

System Configuration Menu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

SNMP Configuration Menu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Switch Configuration Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Forwarding Table Configuration Menu. . . . . . . . . . . . . . . . . . . . . . . . . 33

Spanning Tree Configuration Menu. . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Spanning Tree Port Configuration Menu . . . . . . . . . . . . . . . . . . . . . . . 37

Spanning Tree Port #n Configuration Menu. . . . . . . . . . . . . . . . . . . . . 38

VLAN Configuration Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

VLAN Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

VLAN #n Configuration Menu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

VLAN Port Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

Class of Service Configuration Menu. . . . . . . . . . . . . . . . . . . . . . . . . . 43

Port Priority Menu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

Port Menu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

Port Configuration Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

Switch Statistics Screen. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

Switch Summary Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

Port Statistics Screen. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

General Information Screen. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

Download Software M enu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

Save Current Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

Return to Default Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

Logout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

4. CONFIGURING & MONITORING THE SWITCH . . . . . . . . . . . . . . . . . . . . . 55

Common Tasks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

Setting Password Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

Assigning an IP Address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

Checking Network Configuration Status. . . . . . . . . . . . . . . . . . . . . . . . 57

Connecting via Telnet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

Setting SNMP Management Access . . . . . . . . . . . . . . . . . . . . . . . . . . 58

Viewing Switch Statistics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

Configuring Port Mirroring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

ii Table of Contents ELS100-24TXM

Downloading a Software Upgrade . . . . . . . . . . . . . . . . . . . . . . . . . . . .59

Downloading Via the Ser ial Port . . . . . . . . . . . . . . . . . . . . . . . . . . 60

Downloading Via TFTP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

Configuring Spanning Tree Parameters . . . . . . . . . . . . . . . . . . . . . . . .61

Configuring VLANs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .62

Configuring Class of Service. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .62

Configuring Port Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .63

Configuring the Forwarding Table. . . . . . . . . . . . . . . . . . . . . . . . . . . . .64

Configuring Broadcast Cutoff Rate. . . . . . . . . . . . . . . . . . . . . . . . . . . .65

Setting a Default Gateway . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .66

Configuring BootP/DHCP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .66

5. SNMP MANAGEMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .67

The SNMP Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .67

MIB Objects . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .68

RFC 1213 (MIB-II) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68

RFC 1398 (Ethernet MIB) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69

RFC 1493 (Bridge MIB) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69

RFC 1757 (RMON MIB). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 9

Cabletron Systems Proprietary MIB Extensions . . . . . . . . . . . . . .70

Compiling MIB Extensions: Cabletron Website. . . . . . . . . . . . . . . . . . .73

APPENDIX A. TECHNICAL SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . .75

General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 5

Standards Compliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

Certification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .75

Data Rate. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .75

Environmental Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . .75

Electrical Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .76

Physical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .76

Microprocessor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .76

Memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .76

Port Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .77

Console Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .77

10Base-T and 100Base-TX Ports . . . . . . . . . . . . . . . . . . . . . . . . . 77

MDI/MDI-X Crossover Cable Wiring . . . . . . . . . . . . . . . . . . . . . . .78

Power Cord Set Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .78

General Requirements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .78

Country-Specific Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . 79

APPENDIX B. SPANNING TREE CONCEPTS. . . . . . . . . . . . . . . . . . . . . . . . .81

General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 1

Spanning Tree Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81

Spanning Tree Protocol in a Net work . . . . . . . . . . . . . . . . . . . . . . . . . . 82

Spanning Tree Protocol Par a m e t e r s. . . . . . . . . . . . . . . . . . . . . . . . . . . 83

Spanning Tree Protocol Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84

Communicating Between Bridges . . . . . . . . . . . . . . . . . . . . . . . . .84

Selecting a Root Bridge and Designated Bridges . . . . . . . . . . . . . 84

Selecting Designated Ports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .84

ELS100-24TXM Table of Contents iii

Handling Duplicate Pa ths . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84

Remapping Networ k Topology . . . . . . . . . . . . . . . . . . . . . . . . . . . 84

APPENDIX C. FLOW CONTROL. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87

APPENDIX D. VIRTUAL LANS (VLANS). . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89

VLANs and Frame Tagging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89

ELS100-24TXM VLAN Co nfiguration. . . . . . . . . . . . . . . . . . . . . . . . . . 90

VLAN ID . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90

Ports in VLAN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90

VLAN Egress Ports. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91

VLAN Access Ports. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91

VLAN Hybrid Ports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92

VLAN Application Example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94

APPENDIX E. CLASS OF SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95

APPENDIX F. ACRONYMS & ABBREVIATIONS . . . . . . . . . . . . . . . . . . . . . . 97

INDEX. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Index 99

iv Table of Contents ELS100-24TXM

PREFACE

Purpose

This guide provides information about the features and applications of the Cabletron Systems ELS100-24TXM switch as well as instr uctions for configuring and monitoring the switch.

Audience

This guide is intended for Et hernet local area network ( LAN) administrators and Management Information Systems (MIS) personnel with the following background:

•

Working knowledge of Ethern et LANs

•

Familiarity with Transmission Control Protocol/Internet Protocol

(TCP/IP) and Simp le Network Management Pr otocol (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.

9032785 Preface i

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 Gatewa y IP add ress 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 Configuratio n Men u.

Other Conventions

This guide uses the following typographical conventions:

Initial Caps Menu titles and console menu selections

•

[Enter] 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

•

Organization

Chapter 1. Product Overview

and rear panel components and applicati on examples.

Chapter 2. Installatio n

lists site requirements, and provides mounting inst ructions. Instructions for making connections and powering up the switch are provided as well.

Chapter 3. ELS100-24TXM 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 wi thin each menu.

Chapter 4. Configuring and Monitoring the Swit ch

common tasks and associated steps required to configure the switch, and covers common switch and network considerations required to ensure system integrity.

: Describes the features of the switch, front

: Describes the content of your switch shipment,

: Describes the user interface

: Describes

Chapter 5. SNMP Management

Management Protocol (S NM P) communication protocol is use d to manage the switch, and provides a descri ption of industry standard and proprietary Managed Information Bases (MIBs) supported by the switch.

ii Preface ELS100-24TXM

: Describes how the Simple Net work

Appendix A. Technical Specifications

: Provides a list of standards compliance and certifications as wel l as physi cal and operational specifications.

Appendix B. Spanning Tree Concepts

: Describes the operation of the Spanning Tree Protocol and how it is used to r esolve 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 dom ains, 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 cri tic al t ra ff ic dur ing periods of congestion.

Appendix F. Acronyms and Abbreviations:

Provides definitions f o r a list of common acronyms and abbreviation s used within the user guide and the networking industry.

9032785 Preface iii

1. PRODUCT OVERVIEW

Description

This installation and user guide descr ibes the Cabletron Systems ELS100-24TXM Ethernet switch. The switch 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. In addition, two of the switch’s ports suppo rt Fast Ethernet over fiber ( IE EE 80 2.3u 100Base-FX) when a modu lar daughtercard is installed.

The Cabletron ELS100-24TXM 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 ELS100-24TXM switch contains advanced features such as Remote Monitoring (RMON), IEEE 802.1Q virtual LANs (VLANs), IEEE 802.1p Class of Service , flow co ntr ol and broadcast throttling. For network management, the ELS100-24TXM switch includes a standardscompliant Simple Netw or k Management Protocol (SNM P) agent. This agent allows network management station applications to collect and present status and perfo rm ance information about a switch as well as providing the ability to conf igure and control functi ons on t he device.

Network management can also be performed in-band using the popular TCP/IP application, Telnet. In addition, a serial console port allows out-ofband management using a PC or an ASCII terminal. The ELS100-24TXM 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 foll owing information:

•

Product Description

•

Features

•

Front and Rear Panel Component Descriptions

•

Feature Summaries

•

Application Examples

9032785 Product Overview 1

Features

•

Ports:

- 24 dual-speed 10Base-T/100 Base-TX ports using RJ-45 connectors (MDI-X); 22 p ort s act ive when using modular slot for 100Base-FX connections

- 1 modular slot for 2 100Base-FX ports using SC connectors

Architecture:

- 8-port 10/100 switch ASIC in a distributed switchin g architecture

- 4.2 Gbps internal switching fabric

- 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 fu ll/half duplex and 10/100 Mbps speed operation on all RJ- 45 ports

- High performance store-and-forward switching

Performance:

- Forwarding: 3.6 million packets-per-second (64 byte packets)

- Filtering: 3.6 million packets - per-second (64 byte packets)

•

Traffic Management:

- Tag and port-based VLAN s p er the IEEE 802.1Q draft standard - 4094 VLAN IDs recogni zed 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 thro ttling for broadcast storm control

•

Network Management:

- SNMP compliant agent: MIB II (RFC 1213); Bridge MIB (RFC

1493); Ethernet MIB (RFC 1398); RMON - Statisti cs, History, Alarm and Event groups per port (RFC 1757); private MIB extensions

- Port mirroring for network monitoring and analysis

-Telnet

- Console port, RS-232, fem ale DB-9 connector, null modem

- BootP/DHCP for IP address configuration

•

LED Indicators

- 10Base-T/100Base-TX Ethernet ports: Link, Activity, 100Mbps Speed, Full Duplex

- 100Base-FX Ethern et por ts: Link and Activity

- System: Power, Test

•

Software:

- Extensive diagnostics for produ ct t esting and troubleshooting

- Upgrades using the front panel console port or in-band with TFTP

2 Product Overview ELS100-24TXM

Front Panel

Figure 1-1 shows the front panel of the ELS100-24TXM. Table 1-1 defines the ELS100-24TXM front panel components.

Figure 1-1. ELS100-24TXM Front Panel

Table 1-1. Front Panel Components

Name Function

100Base-FX Fiber ports (Ports 1 and 2)*

Fiber Ports 1 and 2 LEDs*

10Base-T/100Base-TX RJ-45 ports (Ports 1-24)*

Ports 1-24 RJ-45 LEDs* Indicates Link, Activity, Speed and Duplex information

LED mode button Button used to switch RJ-45 port LEDs between Link/

Power LED Li

Test LED Li

Console port Female DB-9 connector confi

Fiber ports usin modules (see Table 2-3 for a list of available uplink modules).

Indicates Link and Activity information (see Table 1-2 for details).

Copper ports usin are wired MDI-X.

(see Table 1-2 for details).

Activity mode and 100M/Fu ll Duplex mode. This button has no affect on fiber port LEDs.

hts steady green to indicate power is supplied to the

switch. Off indicates no power is supplied to the switch.

hts 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.

connection for serial out-of-band mana the console menus.

SC fiber connectors for fiber uplink

RJ-45 port connectors. All ports

ured as a null modem

ement using

* There are 24 total ports on the ELS100-24TXM switch. When the fiber module is installed, these ports become ports 1 and 2, used for fiber connections. Ports 1 and 2 RJ-45 connectors then become disabled.

9032785 Product Overview 3

Figure 1-2 shows the Link and Activity LEDs for the 2 100Base-FX ports (fiber port LED functions are defined in Table 1-2). The LEDs are positioned to the left of their associated port.

Link LEDs

Activity LEDs

Figure 1-2. 100Base-FX Po rt LEDs

Figure 1-3 shows the Link and Activity port LEDs for 24 10Base -T/ 100Base-TX ports (defau lt configuration). When the fiber module is installed, ports 1 and 2 RJ-45 LEDs become disabled.

Pressing the front panel LED mode button changes the operation of the RJ-45 LEDs to 100M Speed and Full Duplex, as shown in Figure 1-4.

Link

Activity

Link

Activity

10/100 speed

Full/half duplex

10/100 speed

Full/half duplex

The numbers above and below the port LEDs identify the LEDs associated with a specific RJ-45 port.

234

5678

Link

Activity

Link

Activity

13 14 15 16

Link

Activity

Link

Activity

18 19 20

21 22 23 24

10 11 12

Figure 1-3. RJ-45 Port LEDs Default Configuration

10 11 12

234

5678

10/100 speed

Full/half duplex

10/100 speed

Full/half duplex

13 14 15 16

10/100 speed

Full/half duplex

10/100 speed

Full/half duplex

21 22 23 24

18 19 20

Figure 1-4. Port LEDs LED Mode Button Pressed

4 Product Overview ELS100-24TXM

The port LEDs are grouped to the left of their corresponding RJ-45 ports.

Table 1-2 defines the perf or m ance of the port LEDs for the 10Base -T/ 100Base-TX ports in bot h the default configuration and with the LED mode button pressed.

Table 1-2. Port LEDs Defined

Name Function

Fiber Ports Link LED On: Indicates a valid connection (link) on the associat-

ed port. Link LED Off: Indicates no link on the associated port.

RJ-45 Ports Default Confi tion

RJ-45 Ports LED mode button pressed

ura-

Activity LED flashin receive activity.

Activity LED Off: Indicates the absence of transmit or re ceive activity.

Link LED On: Indicates a vali d co nn ection (l ink) on the associa ted port.

Link LED Off: Indicates no link on the associated port. Activity LED flashin

receive activity. Activity LED Off: Indicates the absence of transmit or re ceive ac-

tivity. 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.

: Indicates the presence of transmit and/or

9032785 Product Overview 5

Rear Panel

Figure 1-5 shows the ELS100-24TXM rear panel and Table 1-3 defines the rear panel components.

Figure 1-5. ELS100-24 TXM Rear Panel

Table 1-3. Rear Panel Compone nts

Name Function

Power Connector Provides AC power to the switch. Power Switch Allows you to tu rn the switch power on and off. Fan Outlets Air exit vents throu

for ventilation purposes.

Feature Summaries

The following summaries provi de a brief description of ELS100 -24TXM features in areas such as standards compliance, functionality, performance, and options.

IEEE 802.1D Bridge

The ELS100-24TXM swit ch is fully compliant with IEEE 802 .1D transparent bridging speci fi c at ions. An aggregate address table containing 4096 entries per 8 switch ports is provided for learning, filtering, and forwardi ng. 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 for warding treatment by the network administrator if d esir ed. Forwarding table configuration can be made out-of-band via th e console interface or in-band via SNM P or Telnet. Static and dynamic addresses are both stored in this table. One static address is assigned per port by def ault. The Forwarding Tabl e Configuration screen in the console menus allows you to assign additional static addresses if required.

h which internal fans discharge air

6 Product Overview ELS100-24TXM

Spanning Tree Protocol

The ELS100-24TXM 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 ELS100-24TXM 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 ELS100-24TXM switch provides 4 MB of dynamically allocated frame buffering per 8 ports. This buffer space is used to queue packets for transmission on congested networ ks. This is an additional advantage over cut-through switching technology, which drops packets immediately when experiencing collis ions.

Software Download

The ELS100-24TXM switch suppor ts t he industry-standard Trivial File Transfer Protocol (TFTP) for downloading software to th e s wit ch. 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 usi ng the XMODEM protocol.

A TFTP or XMODEM software download is invoked via the Download Software Me nu usi ng the conso le menu s. A TFTP dow nlo ad can al so be invoked via SNMP.

Non-volatile Parameter Storage

Important operating param eters such as IP addresses, Spanning Tree configuration, and manag em ent secur it y par a meters, are stored in nonvolatile Flash memory. These values are retained when the switch experiences power interruptions or is powered down for normal maintenance.

9032785 Product Overview 7

Configuration and Management Interfaces

The ELS100-24TXM swit ch 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 outof-band switch management. Serial console management is performed using a terminal, or computer system running communications software. See Chapter 3, “ELS100-24TXM User Interface,” for more detailed information on managing the ELS100- 24TXM 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, “ELS100-24TXM User I nterface,” for more detailed information on managing the switch via the serial console. Global password protection for changing the operating parameters of the switch is provided.

SNMP-based network ma nager, in-band

•

The switch can be managed using SNMP, the most common protocol used today for network management. Standard agent MIBs embedded in the switch provide basic SNMP management through industry-standard SNMP applications.

Management security protection is provided based on SNMP community names. See Chapter 5, “SNMP Management,” for more information.

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 MI B. 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 ELS100-24TXM supports four of the nine groups of RMON def ined for Ethernet networks on a per por t basi s. 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. Alarm s tr igger other actions throug h the Event group.

8 Product Overview ELS100-24TXM

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 ELS100-24TXM switch i ncludes the ability to mirror the traffic being switched on any port for purposes of net work 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 t ra ff ic f rom 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 occ urs at the same speed configured for the port (10Mbps-to-10Mbps or 100Mbps-to100Mbps). 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 swit ch to automatically select the operational modes of its 10/100 RJ-45 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 autonegotiation as the ELS10 0-24TXM switch automatic al ly adjusts to the network device’s communicati on settings. Auto-negotiation is configurable in the Port Configuration Menu of the console menus or via SNMP.

Broadcast Throttling

The ELS100-24TXM 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 typical ly 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 programm able broadcast cutoff rate param eter allows a rate threshol d 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 al leviate broadcast storms, a problem often encountered in Ether net networks. Broadcast throttling is configurable in the Swit ch Conf iguration menu of the console menus or via SNMP.

9032785 Product Overview 9

BootP/DHCP

The Bootstrap Protocol (BootP) and the Dynamic Host Configuration Protocol (DHCP) provide for the capability of passing configur ation 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 ELS100-24TXM switch uses BootP and DHCP to automatically configure IP address information without requiring access to the console menus. BootP /D HCP 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 port mode. The default operation of the RJ-45 LEDs indicates Link (L) and Activity (A) for each of the ports. The operation of these LEDs can be changed by use of the LED mode button on the switch front panel. When the LED mode button is pressed (pressed and held in), the operation of the RJ-45 LEDs changes to indicate 10/100 Mbps speed and full/half duplex operation, respectively. The fiber port LEDs indicate Link (L) and Activity (A) for each of the ports. The fiber port LEDs are not affected by the LED mode button.

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 Coll ision Detection (CSMA/CD) protocol, allowing for two-way traffic. Full dupl ex is configurable using the Duplex Mode par am eter in the Port Menu of the console menus or via SNMP.

Flow Control

Flow control allows you to manage network traffic during con gestion 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 ELS100-24TXM switch supports flow control per th e IE EE 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 ELS100-24TXM switch supports tagged VLANs per the IEEE 802.1Q draft standard. With fram e tagg ing, 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 inform ation.

10 Product Overview ELS100-24TXM

Class of Service

Class of Service support allows you to assign a higher priority to selected traffic passing through the switch. The ELS100-24TXM switch supports Class of Service attributes per the IEE E 802.1p draft standard using a priority queuing mechanism. This feature ensures that tr af fic during congestion periods will not interfere with traffic assigned a higher priority. Traffic assigned a lower priority is subj ect to discard when memory is in short supply. See Appendix E, “ Cl ass of Service,” for more infor m ati on.

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 segmentat ion and traffic prioritizati on.

The ELS100-24TXM 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 affordabl e 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 ELS100-24TXM switch employed in application examples:

Client/Server Network

•

Local Backbone

•

9032785 Product Overview 11

Client/Server Network Application

To improve workstation per for m ance in a client/server environment, the ELS100-24TXM switch can be configured to provide 200 Mbps full duplex Fast Ethernet connections to servers by connecting each to a dedicated switch port (Figure 1-6). Users can be accommodated through connections to hubs, both at 10Mbps and 100M bps speeds, through 10Mbps switches with 100Mbps uplinks, or thr ough direct connections. The fiber uplinks are available to connect the switch to a remote location, such as another building floor or a separate building.

Figure 1-6. Client/Server Ne twork Applicat io n

12 Product Overview ELS100-24TXM

Local Backbone Application

The ELS100-24TXM 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 of f of the switched backbone as well. The fiber uplinks are available to connect the switch to a remote location, such as another building floor or a separate buil ding.

Figure 1-7. Local Backbone Appli cat ion

9032785 Product Overview 13

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:

•

ELS100-24TXM Fast Ethernet switch

•

Fiber port protective plugs inserted into 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 shel f sur face, 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, “Specifications.”

Primary voltage selection within the above ranges is automatic and requires no user action.

•

Environmental Install the ELS100-24TXM 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 temperatur e and humidity specifications, see Appendix A, “Sp e cif ications.”

•

Ventilation Do not restrict airflow by covering or obstructing air inlets on the side

of the switch or the rear panel in ternal air fan exits.

9032785 Installation 15

Mounting the Switch on a Table or Shelf

Mount the switch on a table or shelf in a position whi ch allows access to the front panel RJ-45 ports, visi bility of the port LEDs, and access to the power cord. Make sure that the mounting surface can safely support the switch and that there is adequate space around the switch for ventilation and cooling.

16 Installation ELS100-24TXM

+ 87 hidden pages