Cabletron Systems ELS100-8TXUF2 User Manual

SmartSTACK

ELS100-8TXUF2

FAST ETHERNET SWITCH

INSTALLATION

AND

USER GUIDE

9033029

Notice

Only qualified personnel should perform installation
procedures.

NOTICE

Cabletron Systems reserves t he ri ght to make changes in specifications a nd other information
contained in this docum e nt wit hout prior notice. The reade r shoul d in all cases consult Cabletron
Systems to determine whethe r any such c hanges have been made.

The hardware, firmwa re, or soft ware described in this manual is subject to change withou t 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 SYSTEMS HAS BEEN
ADVISED OF, KNOWN, OR SHOULD HAVE KNOWN, THE POSSIBILITY OF SUCH
DAMAGES.

 1999 by Cabletron Systems, Inc., P.O. Box 5005, Rochester, NH 03866-5005

All Rights Reserved
Printed in Taiwan, R.O.C.

Order Number: 9033029 April 1999

Cabletron Systems, is a registered trademark and SmartSwitch is a trademar k of Cabletron
Systems, Inc.

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

FCC NOTICE

This device compli es wit h Part 15 of the FCC rules. Operation is subject to the following tw o
conditions: (1) this device may not cause harmful interference, and (2) th is device must accept any
interference received, including inte rfe rence that may cause undesired operation.

NOTE: This equipment has been tested and found to comply with the limits for a Class A digital

device, pursuant to Part 15 of t he FCC rules. These limits are de signed to provide reasonable
protection against harmful interference when the equipment is operated in a commercial environment.
This equipment use s , ge ne rates, and can radiate ra dio frequency energy and if not installed in

accordance with the o pe r at or’s manual, may cause harmful interference to radi o communications.
Operation of this equipment in a residential area is likely to cause interference in which case the user
will be required to corre ct the interference at his own expense .

WARNING: Changes or modifications made to this device which are not expressly approved by the

party responsible for co mpliance could void the user’s authority to opera te the equipment.

9033029

i

Notice

INDUSTRY CANADA NOTICE

This digital apparatus does not exceed the Class A limits for radio noi s e em i ssions from digital
apparatus set out in the Ra di o Interference Regulations of the Canadian Department of
Communications.

Le présent appareil numérique n’émet pas de bruits radioélectriques dépassant les limites applicables
aux appareils numérique s de la cl ass A pre scri tes dans le Règlement sur le brouilla ge radioélectrique
édicté par le ministère des Communications du Ca nada.

VCCI NOTICE

This is a Class A product based on th e sta n dard of the Voluntary Control Counci l for Interference by
Information Technology Equipment (VCCI). If this equipment is use d in a domestic environme nt ,
radio disturbance may ari s e. W h e n such trouble occurs, the user m ay be required to take correcti ve
actions.

ii

9033029

Notice

CABLETRON SYSTEMS, INC.

PROGRAM LICENSE AGREEMENT

IMPORTANT: THIS LICENSE APPLIES FOR USE OF PRODUCT IN THE FOLLOWING

GEOGRAPHICAL REGIONS:

CANADA

This document is an agre em ent (“Agreement”) betw e en You, the end user, and Cabletron
Systems, Inc. (“Cabletron” ) tha t sets forth your rights and obligati ons wi th re spect to the Cabletron
software program (“Program ”) in the pac kage. The Program may be contain ed in firmware, chips or
other media. UTILIZING THE ENCLOSED PRODUCT, YOU ARE AGREEING TO BECOME
BOUND BY THE TERMS OF THIS AGREEMENT, WHICH INCLUDES THE LICENSE AND
THE LIMITATION OF WA RRANTY AND DISCLAIMER OF LIABILITY. IF YOU DO NOT
AGREE TO THE TERMS OF THIS AGREEMENT, RETURN THE UNOPENED PRODUCT TO
CABLETRON OR YOUR DEALER, IF ANY, WITHIN TEN (10) DAYS FOLLOWING THE
DATE OF RECEIPT FOR A FULL REFUND.

IF YOU HAVE ANY QUESTIONS ABOUT THIS AGREEMENT, CONTACT CABLETRON
SYSTEMS [phone]. Attn: Legal Department.

1. LICENSE. You have the right to use only the one (1) copy of the Program pro vided in this
package subject to the terms and con d it ions of this License A greement.

You may not copy, reproduce or transmit any part of the Program except as permitted by the
Copyright Act of the Unite d States or as authorized in wr it ing by Cabletron.

2. OTHER RESTRICTIONS. You may not reverse engineer, de compile, or disassemble th e
Program.

3. APPLICABLE LAW. This License Agreement sha ll be in terpreted and governed und er t h e
laws and in the sta t e and federal courts of N ew Hampshire. You accept the person al jurisdiction and
venue of the New Hampshire courts.

4. EXPORT REQUIREMENTS. You understand that Cabletron and its Affiliates are subject to
regulation by agencies of the U.S. Government, in cl udi ng the U.S. Department of Comme r c e, which
prohibit export or diversion of certain technical products to certain countries, unless a license to export
the product is obtained from the U.S. Government or an exception from obtaining such license may be
relied upon by the export ing party.

If the Program is exported from the United States pursuant to the License Exception CIV under
the U.S. Export Adminis tra ti on Regulations, You agree that You are a civil end user of the Pro gra m
and agree that You will use the Program for civil end us es onl y and not for military purposes.

MEXICO
CENTRAL AMERICA
SOUTH AMERICA

BEFORE OPENING OR UTILIZING THE ENCLOSED PRODUCT,
CAREFULLY READ THIS LICENSE AGREEMENT.

9033029

iii

Notice

If the Program is exported from the United States pursuant to the License Exception TSR under

the U.S. Export Adminis tra ti on Regulations, in addition to the restriction on transfer set forth in
Sections 1 or 2 of this Agreement, You agree not to (i) reexport or release the Program, the source
code for the Program or technology to a national of a country in Country Groups D:1 or E:2 (Albania,
Armenia, Azerbaijan , Belarus, Bulgaria, Camb odi a, Cuba, Estonia, Georgia, Iraq, Kaz akhstan,

Kyrgyzstan, Laos, Latvia, Libya, Lithuania, Moldova, North Korea, the People’s Republic of China,
Romania, Russia, Rwanda, Tajikistan, Turkmenistan, Ukrain e, Uzbekistan, Vietnam, or such other
countries as may be designated by the United States Government), (ii) export to Country Groups D:1
or E:2 (as defined herein) the dire ct product of the Program or the te chnology, if such foreign
produced direct produc t is subject to national securit y c ontrols as identified on the U.S. Co m me rce
Control List, or (iii) if the dire ct product of the technology is a com plete plant o r any major
component of a plant, export to Country Groups D:1 or E:2 the direct product of the plant or a major
component thereof, if such foreign produced direc t product is subject to national security controls as
identified on the U.S. Commerce Control List or is subje ct to State Department con trols under the
U.S. Munitions List.

5. UNITED STATES GOVERNMENT RESTRICTED RIGHTS. The enclosed Product (i)
was developed solely at private expense; (ii) conta ins “restricted computer software” submitted with
restricted rights in acc ordance with section 52.227-19 (a) through (d) of the Commercial Co m puter
Software-Restricted Rights Cl ause and its successors, and (iii) in all respe c ts is pro pri etary data
belonging to Cabletron and/or its suppliers. For Department of Defense units, the Product is considered
commercial computer software in accordance with DFARS section 227.7202-3 and its successors, and
use, duplication, or disclosu re by the Government is subject to restr ic ti ons se t fort h herein.

6. EXCLUSION OF WARRANTY. Except as may be specifically provided by Cable tron in
writing, Cabletron makes no warranty, expressed or implied, conc erning the Program (including its
documentation and media).

CABLETRON DISCLAIMS ALL WARRANTIES, OTHER THAN THOSE SUPPLIED TO

YOU BY CABLETRON IN WRITING, EITHER EXPRESS 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 HARDWARE.

7. 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, 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 POSSIBILITY OF SUCH DAMAGES. BECAUSE SOME STATES DO
NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR
INCIDENTAL DAMAGES, OR IN THE DURATION OR LIMITATION OF IMPLIED
WARRANTIES IN SOME INSTANCES, THE ABOVE LIMITATION AND EXCLUSIONS MAY
NOT APPLY TO YOU.

iv

9033029

Notice

CABLETRON SYSTEMS SALES AND SERVICE, INC.

PROGRAM LICENSE AGREEMENT

IMPORTANT: THIS LICENSE APPLIES FOR USE OF PRODUCT IN THE UNITED

STATES OF AMERICA AND BY UNITED STATES OF AMERICA
GOVERNMENT END USERS.

BEFORE OPENING OR UTILIZING THE ENCLOSED PRODUCT,
CAREFULLY READ THIS LICENSE AGREEMENT.

This document is an agre em ent (“Agreement”) between You, the end user, and Cabletron Systems
Sales and Service, Inc. (“Cabletron”) that sets forth yo ur rights and obligations with respect to the
Cabletron software program (“Program”) in the package. The Program may be contained in firmware,
chips or other media. UTILIZING THE ENCLOSED PRODUCT, YOU ARE AGREEING 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, RETURN THE UNOPENED
PRODUCT TO CABLETRON OR YOUR DEALER, IF ANY, WITHIN TEN (10) DAYS
FOLLOWING THE DATE OF RECEIPT FOR A FULL REFUND.

IF YOU HAVE ANY QUESTIONS ABOUT THIS AGREEMENT, CONTACT CABLETRON
SYSTEMS [phone]. Attn: Legal Department.

1. LICENSE. You have the right to use only the one (1) copy of the Progr am provided in this
package subject to the terms and con d it ions of this License A greement.

You may not copy, reproduce or transmit any part of the Program except as permitted by the
Copyright Act of the Unite d States or as authorized in wr it ing by Cabletron.

2. OTHER RESTRICTIONS. You may not reverse engineer, decompile, or disasse m b l e th e
Program.

3. APPLICABLE LAW. This License Agreem ent shall be interpreted and go verned under the
laws and in the sta t e and federal courts of N ew Hampshire. You accept the person al jurisdiction and
venue of the New Hampshire courts.

4. EXPORT REQUIREMENTS. You understand that Cabletron and its Affiliates are subject to
regulation by agencies of the U.S. Government, in cl udi ng the U.S. Department of Comme r c e, which
prohibit export or diversion of certain technical products to certain countries, unless a license to export
the product is obtained from the U.S. Government or an exception from obtaining such license may be
relied upon by the export ing party.

If the Program is exported from the United States pursuant to the License Exception CIV under
the U.S. Export Adminis tra ti on Regulations, You agree that You are a civil end user of the Pro gra m
and agree that You will use the Program for civil end us es onl y and not for military purposes.

9033029

v

Notice

If the Program is exported from the United States pursuant to the License Exception TSR under

the U.S. Export Adminis tra ti on Regulations, in addition to the restriction on transfer set forth in
Sections 1 or 2 of this Agreement, You agree not to (i) reexport or release the Program, the source
code for the Program or technology to a national of a country in Country Groups D:1 or E:2 (Albania,
Armenia, Azerbaijan , Belarus, Bulgaria, Camb odi a, Cuba, Estonia, Georgia, Iraq, Kaz akhstan,

Kyrgyzstan, Laos, Latvia, Libya, Lithuania, Moldova, North Korea, the People’s Republic of China,
Romania, Russia, Rwanda, Tajikistan, Turkmenistan, Ukrain e, Uzbekistan, Vietnam, or such other
countries as may be designated by the United States Government), (ii) export to Country Groups D:1
or E:2 (as defined herein) the dire ct product of the Program or the te chnology, if such foreign
produced direct produc t is subject to national securit y c ontrols as identified on the U.S. Co m me rce
Control List, or (iii) if the dire ct product of the technology is a com plete plant o r any major
component of a plant, export to Country Groups D:1 or E:2 the direct product of the plant or a major
component thereof, if such foreign produced direc t product is subject to national security controls as
identified on the U.S. Commerce Control List or is subje ct to State Department con trols under the
U.S. Munitions List.

5. UNITED STATES GOVERNMENT RESTRICTED RIGHTS. The enclosed Product (i)
was developed solely at private expense; (ii) conta ins “restricted computer software” submitted with
restricted rights in acc ordance with section 52.227-19 (a) through (d) of the Commercial Co m puter
Software-Restricted Rights Cl ause and its successors, and (iii) in all respe c ts is pro pri etary data
belonging to Cabletron and/or its suppliers. For Department of Defense units, the Product is considered
commercial computer software in accordance with DFARS section 227.7202-3 and its successors, and
use, duplication, or disclosu re by the Government is subject to restr ic ti ons se t fort h herein.

6. EXCLUSION OF WARRANTY. Except as may be specifically provided by Cabletron in
writing, Cabletron makes no warranty, expressed or implied, conc erning the Program (including its
documentation and media).

CABLETRON DISCLAIMS ALL WARRANTIES, OTHER THAN THOSE SUPPLIED TO

YOU BY CABLETRON IN WRITING, EITHER EXPRESS 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 HARDWARE.

7. 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, 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 POSSIBILITY OF SUCH DAMAGES. BECAUSE SOME STATES DO
NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR
INCIDENTAL DAMAGES, OR IN THE DURATION OR LIMITATION OF IMPLIED
WARRANTIES IN SOME INSTANCES, THE ABOVE LIMITATION AND EXCLUSIONS MAY
NOT APPLY TO YOU.

vi

9033029

Notice

CABLETRON SYSTEMS LIMITED

PROGRAM LICENSE AGREEMENT

IMPORTANT: THIS LICENSE APPLIES FOR THE USE OF THE PRODUCT IN THE

FOLLOWING GEOGRAPHICAL REGIONS:

EUROPE
MIDDLE EAST
AFRICA
ASIA
AUSTRALIA
PACIFIC RIM

BEFORE OPENING OR UTILIZING THE ENCLOSED PRODUCT,
CAREFULLY READ THIS LICENSE AGREEMENT.

This document is an agre em ent (“Agreement”) betw e en You, the end user, and Cabletron
Systems Limited (“Cabletron”) that sets forth your rights and obligations with re sp ect to the
Cabletron software program (“Program”) in the package. The Program may be contained in firmware,
chips or other media. UTILIZING THE ENCLOSED PRODUCT, YOU ARE AGREEING 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, RETURN THE UNOPENED
PRODUCT TO CABLETRON OR YOUR DEALER, IF ANY, WITHIN TEN (10) DAYS
FOLLOWING THE DATE OF RECEIPT FOR A FULL REFUND.

IF YOU HAVE ANY QUESTIONS ABOUT THIS AGREEMENT, CONTACT CABLETRON
SYSTEMS [phone]. Attn: Legal Department.

1. LICENSE. You have the right to use only th e one (1) copy of the Program pro vided in this
package subject to the terms and con d it ions of this License A greement.

You may not copy, reproduce or transmit any part of the Program except as permitted by the
Copyright Act of the Unite d States or as authorized in wr it ing by Cabletron.

2. OTHER RESTRICTIONS. You may not reverse engineer, de compile, or disassemble th e
Program.

3. APPLICABLE LAW. This License Agreement shall be governed in accordance with English
law. The English court s shal l have exclusive jurisdic tion in the event of any disputes.

4. EXPORT REQUIREMENTS. You understand that Cabletron and its Affiliates are subject to
regulation by agencies of the U.S. Government, in cl udi ng the U.S. Department of Comme r c e, which
prohibit export or diversion of certain technical products to certain countries, unless a license to export
the product is obtained from the U.S. Government or an exception from obtaining such license may be
relied upon by the export ing party.

If the Program is exported from the United States pursuant to the License Exception CIV under
the U.S. Export Adminis tra ti on Regulations, You agree that You are a civil end user of the Pro gra m
and agree that You will use the Program for civil end us es onl y and not for military purposes.

9033029

vii

Notice

If the Program is exported from the United States pursuant to the License Exception TSR under

the U.S. Export Adminis tra ti on Regulations, in addition to the restriction on transfer set forth in
Sections 1 or 2 of this Agreement, You agree not to (i) reexport or release the Program, the source
code for the Program or technology to a national of a country in Country Groups D:1 or E:2 (Albania,
Armenia, Azerbaijan , Belarus, Bulgaria, Camb odi a, Cuba, Estonia, Georgia, Iraq, Kaz akhstan,

Kyrgyzstan, Laos, Latvia, Libya, Lithuania, Moldova, North Korea, the People’s Republic of China,
Romania, Russia, Rwanda, Tajikistan, Turkmenistan, Ukrain e, Uzbekistan, Vietnam, or such other
countries as may be designated by the United States Government), (ii) export to Country Groups D:1
or E:2 (as defined herein) the dire ct product of the Program or the te chnology, if such foreign
produced direct produc t is subject to national securit y c ontrols as identified on the U.S. Co m me rce
Control List, or (iii) if the dire ct product of the technology is a com plete plant o r any major
component of a plant, export to Country Groups D:1 or E:2 the direct product of the plant or a major
component thereof, if such foreign produced direc t product is subject to national security controls as
identified on the U.S. Commerce Control List or is subje ct to State Department con trols under the
U.S. Munitions List.

5. UNITED STATES GOVERNMENT RESTRICTED RIGHTS. The enclosed Product (i)
was developed solely at private expense; (ii) conta ins “restricted computer software” submitted with
restricted rights in acc ordance with section 52.227-19 (a) through (d) of the Commercial Co m puter
Software-Restricted Rights Cl ause and its successors, and (iii) in all respe c ts is pro pri etary data
belonging to Cabletron and/or its suppliers. For Department of Defense units, the Product is considered
commercial computer software in accordance with DFARS section 227.7202-3 and its successors, and
use, duplication, or disclosu re by the Government is subject to restr ic ti ons se t fort h herein.

6. EXCLUSION OF WARRANTY. Except as may be specifically provided by Cabletron in
writing, Cabletron makes no warranty, expressed or implied, conc erning the Program (including its
documentation and media).

CABLETRON DISCLAIMS ALL WARRANTIES, OTHER THAN THOSE SUPPLIED TO

YOU BY CABLETRON IN WRITING, EITHER EXPRESS 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 HARDWARE.

7. 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, 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 POSSIBILITY OF SUCH DAMAGES. BECAUSE SOME STATES DO
NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR
INCIDENTAL DAMAGES, OR IN THE DURATION OR LIMITATION OF IMPLIED
WARRANTIES IN SOME INSTANCES, THE ABOVE LIMITATION AND EXCLUSIONS MAY
NOT APPLY TO YOU.

viii

9033029

DECLARATION OF CONFORMITY

Application of Council Directive(s): 89/336/EEC

73/23/EEC

Manufacturer’s Name: Cabletron Systems, Inc.

Manufacturer’s Address: 35 Indu strial Way

PO Box 5005
Rochester, NH 03867

European Representative Name: Mr. J. Solari

European Rep re sentative Address: 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 /E EC

EC Directive 73/23/EEC
EN 55022
EN 50082-1
EN 60950

Equipment Type/Environment: Networking Equipment, for use in a

Commercial or Light

Industrial

Environment.

Notice

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 Mr. J. Solari

___________________________________ ___________________________________

Full Name Full Name
Compliance Enginee ri ng Manager Managing Direct or - E. M .E.A.

___________________ ________________ ___________________________________

Title Title
Rochester, NH, USA Newbury, Berkshire, England

___________________________________ ___________________________________

Location Location

9033029

ix

Notice

x

9033029

TABLE OF CONTENTS

PREFACE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .XIII

Purpose. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .xiii

Audience. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .xiii

Conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .xiii

Message Formats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .xiii

Organization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .xiii

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

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

Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1

Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2

Rear Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

Feature Summaries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

IEEE 802.1D Bridge. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

Frame Buffering and Frame Latency. . . . . . . . . . . . . . . . . . . . . . . .4

Auto-negotiation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

Broadcast Throttling. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

Full Duplex Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

Flow Control. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

Spanning Tree. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

Application Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

Client/Server Network Application. . . . . . . . . . . . . . . . . . . . . . . . . .6

INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

2.

Inspecting Your Shipment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

Site Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

Mounting the Switch on a Table or Shelf . . . . . . . . . . . . . . . . . . . . . . . .8

Mounting the Switch on a Wall . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

Powering the Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

Power-Up Verification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

Network Cable Requirements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

Copper. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

Fiber. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

10Base-T/100Base-TX Ports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12

100Base-FX Fiber Ports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13

APPENDIX A.

9033029 Table of Contents xi

TECHNICAL SPECIFICATIONS . . . . . . . . . . . . . . . . . . 15

General. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15

Standards Compliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15

Certification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15

Data Rate. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15

Environmental Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . .15

Electrical Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15

Physical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16

Memory. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Port Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

10Base-T and 100Base-TX Ports. . . . . . . . . . . . . . . . . . . . . . . . . 16

MDI/MDI-X Crossover Cable Wiring . . . . . . . . . . . . . . . . . . . . . . . 16

Power Adapter Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

APPENDIX B.

FLOW CONTROL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

APPENDIX C. ACRONYMS AND ABBREVIATIONS . . . . . . . . . . . . . 21

INDEX. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

xii Table of Contents ELS100-8TXUF2

PREFACE

Purpose

This guide provi des informatio n about the featu res and applic ations of the
Cabletron ELS100-8TXUF2 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 possi bilit y of eq uipmen t damage.

Organization

Chapter 1. Product Overview: Describe s 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 connect ion s an d pow e rin g up the switch are provided as w el l.

Appendix A. Technical Specifications: Provides a list of standards
compliance and certifications as well as physical and operational
specifications.

9033029 Preface xiii

Appendix B. 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 C. Acronyms and Abbreviations: Provides definitions for a
list of common acronyms and abbreviations used within the user guide
and the networking industry.

xiv Preface ELS100-8TXUF2

1. PRODUCT OVERVIEW

Description

This installation and user guide describes the Cabletron Systems
ELS100-8TXUF2 Ethernet switch. This unit is IEEE 802.1D bridging
compliant, and supports eight IEEE 802.3u 100Base-TX Fast Ethernet
ports. Each of the RJ-45 ports c an alternatively operate as an IEEE 802.3i
10Base-T port. In additi on, the switch al so includes one port that supports
Fast Ethernet over fiber (IEEE 802.3u 100Base-FX).

The Cabletron Systems ELS 100-8TXUF2 sw itch 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 approp riat e out put po rt bas ed on the add res ses in
the packet. Each port on the switch operates at full Fast Ethernet wire
speed with full address and frame filtering. This switch also supports
advanced features such as flow control and broadcast throttling.

The ELS100-8TXUF2 switch can be conveniently mounted on a desk or
shelf. LEDs on the front panel provide information about the operating
status of the switc h. The back panel of the switch co ntains a connec tor for
an external power adapter that is provided with the switch.

This chapter provides the following information:

• Product Description

• Features

• Front and Rear Panel Component Descriptions

• Feature Summaries

• Application Examples

Features

• Ports:

- 8 dual-speed 10Base-T/100Base-TX ports using RJ-45
connectors (MDI-X)

- 1 100Base-FX port using SC connectors

Note: When attaching a device to Port 8, use the toggl e s witc h

on the front panel to select the RJ-45 or fiber connector.

• Architecture:

- 8-port switch ASIC in a distributed switching architecture

- 1.6 Gbps internal switching fabric

- Up to 1024 KB packet buffering (128 KB/port)

- Forwarding t able holds up to 1K MAC addresses per system

9033029 Product Overview 1

• Performance

Forwarding and Filtering:

• Traffic Management:

• LED Indicators:

Front Panel

Figure 1-1 shows the front panel of the Cabletron ELS100-8TXUF2. Table
1-1 defines the ELS100-8TXUF2 front panel components.

- IEEE 802.3u auto-negotiation for full/half duplex and 10/100
Mbps speed operation on all RJ-45 10/100 ports

- High performance store-and-forward switching

- at 10 Mbps, 14,880 packets-per-second (64 byte packets)

- at 100 Mbps, 148,800 packets-per-second (64 byte packets)

- Flow control per port: IEEE 802.3x frame-based fo r full duplex;
back-pressure for half duplex

- Broadcast throttling for broadcast storm control

- 10Base-T/100Base-TX Ethe rnet ports: Link, Speed, Collision

- System: Power

Figure 1-1. ELS100-8TXUF2 Front Panel

Table 1-1. Front Panel Components

Name Function

10Base-T/100Base-TX
RJ-45 ports (Ports 1-8)*

100Base-FX Fiber Ports
(Port 8)*

Ports LEDs Indicates Link, Speed and Collision information (see

Power LED Lights steady green to indicate power is supplied to the

* When using Port 8, use the toggle switch on the front panel to select the RJ-45 con-

nector or fiber connector.

2 Product Overview ELS100-8TXUF2

Copper port using RJ-45 port connectors. These ports
are wired MDI-X.

Fiber ports using SC fiber connectors.

Table 1-2 for details).

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

Figure 1-2 shows the po rt Link, Speed and Collision LEDs. Th e port LEDs
are grouped to the left of their corresponding RJ-45 ports. Table 1-2
defines the performance of the port LEDs.

Figure 1-2. Port LEDs

Table 1-2. Port LEDs Defined

LED Function

Link LED On: Indicates a valid connection (link) on the associated port.

Off: Indicates no link on the associated port.

100 LED On: Indicates the port is in the 100Base-TX mode.

Off: Indicates the port is in the 10Base-T mode.

Collision LED Flashing: Indicates packet collisions detected on this port.This is a nor-

mal situation for CSMA/CD Ethernet. Note that collisions do not occur
on full-duplex links.

Off: Indicates no packet collisions detected on this port.

Rear Panel

Figure 1-3 shows the ELS100-8TXUF2 rear panel, which includes a
connector for the DC power adapter.

Figure 1-3. ELS100-8TXUF2 Rear Panel

9033029 Product Overview 3

Feature Summaries

The following summaries provide a brief description of ELS100-8TXUF2
features in areas such as standards compliance, functionality,
performance, and options.

IEEE 802.1D Bridge

The ELS100-8TXUF2 switch is fully compliant with IEEE 802.1D
transparent bridging specifications. An aggregate address table
containing 1K address entries is provided for learning, filtering, and
forwardin g. Addresses are automatically learned by the switch.

Frame Buffering and Frame Latency

The ELS100-8TXUF2 switch is a store-and-forward switching device.
Each frame is copied into switch memory before being forwarded to
another port. This meth od ensures that all forwarde d 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 an d using up va luable netw ork bandw idth, as with
cut-through switching technology.

To minimize the possibility of dropping frames on congested ports, the
ELS100-8TXUF2 switch provides 128 KB frame buffer per port. 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.

Auto-negotiation

Auto-negotiation is a process that permits the switch to automatically
select the operati onal m odes of its p orts. Upo n fi rst bei ng con necte d, 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 u se r int erv enti on. It is no t required that the networ k
device being connected to the switch supports auto-negotiation as the

ELS100-8TXUF2 switch automatically adjusts to the network device’s
communicati on settings.

Broadcast Throttling

The ELS100-8TXUF2 switch has the capability to throttle (or limit) the
flooding of packets through the switch. Broadcast, multicast, and
unknown destinat ion add ress unica st pack ets rec eived by the switc h are
typically flooded to all ports on the switch. 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.

4 Product Overview ELS100-8TXUF2

A broadcast cutoff threshold rate has been set in the switch for the
forwarding of broadcast an d unknown de stination address p ackets. If the
cutoff rate is exceeded,
capability h elps to alleviate
in Ethernet networks.

further packets of these types are dropped. This

broadcast storms, a problem often enco untered

LEDs

The switch port LEDs provide a quick and accurate display of the status
of switch connections. The port LEDs indicate link integrity, speed, and
collisions (for half-duplex connections).

Full Duplex Mode

The full duplex mode of o peratio n on a port can d ouble th e throug hput of
switch connection s. Th is mod e disables the collision detection portion of
the Ethernet Carrier Sense Multiple Access with Collision Detection
(CSMA/CD) protocol allowing for two-way traffic.

Flow Control

Flow control allows you to manage network traffic during congestion
periods and to preven t the loss of pack ets when port buffer thresholds are
exceeded. Flow control also serves to deny access to additional traffic
that could add to a congestion condition. The ELS100-8TXUF2 switch
supports flow control per the IEEE 802.3x standard. See Appendix C

“Flow Control” for more information on this feature.

Spanning Tree

This product is intended to be used as an end-switch and does not
support spanning tree. The re is
to understand and avoid configurations that can create a loop.

no

loop detection. The use r is c autioned

Application Examples

The exploding popularity of the Internet and of corporate intrane ts, as well
as new, high-bandwidth desktop applications are driving the demand for
Fast Ethernet. The in crease in mu ltimed ia traff ic and the nee d to su pport
legacy protocols al ongside new, data intensiv e applicati ons is drivi ng the
need for network segmentation and traffic prioritization.

The ELS100-8TXUF2 switch is ide al for meeting the needs of today’s high
performance networks. The switch’s low cost makes it attractive and
affordable for dedicated 10/100Mbps connections to the desktop.

The following section s illus trate the ELS1 00-8TXUF2 swi tch emplo yed in
application examples:

• Client/Server Network

• Local Backbone

9033029 Product Overview 5

Client/Server Network Application

To improve workstation performance in a client/server environment, the
ELS100-8TXUF2 switch can be configured to provide 200 Mbps full
duplex Fast Ethernet connections to servers by connecting each to a
dedicated switch port (Fi gure 1-4). Users can be acc ommodated th rough
connections to hubs, both at 10Mbps and 100Mbps speeds, through
10Mbps switches with 100Mbps uplinks, or through direct connections.
The fiber uplink is available to connect the switch to a remote location,
such as another building floor or a separate building.

The ELS100-8TXUF2 switch ca n be used in a local backbone appl ication,
connecting network segments together and providing file-server access.
Workgroup hubs are provided with a sin gle connec tion to t he switch w hile
servers are put on dedicated 100 Mbps ports. Routers and other
networking devic es can connect off of the switched ba ckbone as well. Th e
fiber uplink is available to connect the switch to a remote location, such
as another building floor or a separate building.

Figure 1-4. Client/Server Network Application

6 Product Overview ELS100-8TXUF2

2. INSTALLATION

Inspecting Your Shipment

When you receive the shipment of your switch, check the package
contents and make sur e you hav e the following items:

• ELS100-8TXUF2 Fast Ethernet switch

• Mounting velcro

• Rubber feet

• Power adapter

• 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.

• Power source

Provide a power source within six feet (1.8 m) of the installat ion loca­tion. This source must provide 10 0 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.”

• Environmental

Install th e ELS100-8TXUF2 switc h in a dry area, with adequa te air
circulation. Avoid placing the switch in direct sunlight or near other
heat sources, such as hot-air vents. For temperature and humidity

specifications, see Appendix A, “Technical Specifications.”

• Ventilation

Do not restrict airflow by covering or obstructing air inlets on the side
of the switch.

9033029 Installation 7

Mounting the Switch on a Table or Shelf

First attach the rubber f eet to the indentations o n the bottom of the switch .
Then mount the switch on a table or sh elf in a posi tion tha t allows acc ess
to the front panel RJ-45 ports, v isibility of the port LEDs , and access to the
power cord. Make sure that the mounting surface can safely support the
switch and that t here is adequate space around the swit ch for ventilation
and cooling.

The rubber feet improve the switch’s grip on the
mounting surface, and provide ventilation between
switches when stacked together.

8 Installation ELS100-8TXUF2

MMounting the Switch on a Wall

The module ships with one (1 ) velcro strip. The vel cro strip is used to attach

the switch to the wall

Do not attach rubber feet to the switch when mounting the switch to the
wall with velcro.

Figure 2-1 illustrates tw o recommended orientations for wall mounting the
switch. This figure a lso shows w here to t he positi on velcro o n the switc h.
To attach velcro do the following:

1. Place the switch on a flat surface with the Cabletron logo on the left
and the 100Base-FX ports on the right.

2. Attach the velcro to the center of the switch using the
supplied 2 x 4 inch strip of velcro.

3. Position the switch on a wall surface that can safely support the
switch.

Figure 2-1. Mounting the Switch on a Wall

.

9033029 Installation 9

Powering the Switch

To supply power to the switch, do the following:

1. Connect the power adapter to the switch and to a grounded three­prong wall outlet (Fig ure 2 -2). Secure the power cord to th e ti edown
bracket on the back of the switch to preven t it from being accident ally

disconnected from the swi tch. See App end ix A, “Po wer Ad ap ter Se t
Requirements,” for more information regarding specific international
power adapter requirements.

Figure 2-2. Connecting the Power Cord to the Switch

2. Check the Power LED.

The Power LED lights green (see Fig ure 1-1 ). If it do es no t, check to
make sure that the power cord is plugged in correctly and that the
power source is good.

Power-Up Verifica tion

When you connect the power cord, the switch conducts a series of
hardware and software tests to verify correct operation.

10 Installation ELS100-8TXUF2

Network Cable Requirements

Copper

Table 2-1 specifi es the cable types and le ngth co nstrai nts for t he vari ous
copper interfaces on the ELS100-8TXUF2.

Table 2-1. Copper Cable Specifications

Interface Type Cable Requirement Maximum Length

10Base-T Category 3 or 5 Unshielded Twisted

Pair (UTP)

100Base-TX Category 5 UTP 100m (328 ft.)

Fiber

Table 2-2 specifies the fiber types, bandwidth requirements, and length
constraints for the Fast Ethernet fiber interface on the ELS100-8TXUF2.

Table 2-2. Fast Ethernet Fiber Specifications

100m (328 ft.)

Interface Type Fiber Type Fiber Diameter

100Base-FX multi-mode 62.5/125 2,000m (6,560 ft.)

(microns)

Maximum Length (m)

9033029 Installation 11

10Base-T/100Base-TX Ports

The 10Base-T/100Base-TX ports use RJ-45 connectors. Figure 2-3
shows an RJ-45 connector being inserted into a port.

Figure 2-3. Inserting an RJ-45 Connector into a Port

The 10Base-T/100Base-TX port s interface to UTP cabl ing for connecti on
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. Th e ports are wired
with the MDI-X function implemented. Workstations or servers can be
connected to the ELS100-8TXU F2 switch using standard straig ht-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.

12 Installation ELS100-8TXUF2

100Base-FX Fiber Ports

The 100Base-FX Fiber port uses SC connectors . Figure 2-4 shows an SC
fiber connector be in g in se rted in to t he f ibe r po rt o n th e EL S100 -8TXUF2.

Figure 2-4. Inserting a Dual SC Connector into a Port

This port supports multi-mode 62.5/125mm fiber. The 100Base-FX port
uses SC fiber connectors. The SC fiber connectors are configured as a
receive (RX)/and transmit(TX) pair. The RX connector positioned on the
left side of the port and the TX connector on the right side of the port.

9033029 Installation 13

14 Installation ELS100-8TXUF2

APPENDIX A. TECHNICAL SPECIFICATIONS

General

Standards Compliance

IEEE 802.1D Transparent Bridging Specifications (ISO/IEC 10038)
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

Certification

Emissions: FCC Part 15, Subpart B, Class B; EN55022 (CISPR 22),
Class B; VCCI Class B

Safety: CSA/NRTL (C22.2.950,UL1950), TÜV/GS (EN60950)
CE Directives: 89/336/EEC; 93/68/EEC; 73/23/EEC

Data Rate

10Mbps Manchester encoded or 100Mbps 4B/5B encoded.

Environmental Specifications

Operating temperature: 32° to 104° F (0° C to 50° C)
Operating humidity: 5 to 95% relative, non-condensing
Storage temperature: -13° to 158°F (-25° C to 70° C)
Storage humidity: 5 to 95% relative, non-condensing

Electrical Specifications

Input voltage (mains): 90-127* VAC, 220-240 VAC
Input frequency (mains): 50-60 Hz

Output voltage (adapter): 13-19 VDC
Maximum output current (adapter) 800 mA

Minimum power consumption: 15.2 VA
_____________
* Input specifications are dependant on the Country (refer to Table A-2).

9033029 Technical Specifications 15

Physical

Height: 1.46 in. (3.7 cm)
Length: 4.65 in. (11.6 cm)
Width: 9.88 in. (24.9 cm)
Weight: 1.8 lb. (0.815 kg)

Memory

Packet Buffer Memory: 128 KB per port

Port Specifications

10Base-T and 100Base-TX Ports

Table A-1 shows the 10Base-T/100Base-TX pinouts. These ports are
wired MDI-X. All undefined pins are not used.

Table A-1. 10Base-T/100Base-TX Pinouts

Pin MDI-X Signal Name

1 RD+
2 RD­3TD+
6TD-

MDI/MDI-X Crossover Cable Wiring

Figure A-1 shows the w i ring sc he me for implementing a cro ss ov er c abl e

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

16 Technical Specifications ELS100-8TXUF2

Power Adapter Requirements

Table A-2 shows the power adapter requirements.

Table A-2. Power Adapter Requirements

Country Adapter P/N Input Specifications* Output Specifications*
USA: 0950-3274 110-127 VAC, 60Hz 19 VDC, 800 mA
Japan: 0950-3267 90-110 VAC, 50 Hz 19 VDC, 800mA
Australia: 0950-3269 230-240 VAC, 50 Hz 19 VDC, 800mA
UK: 0950-3270 220-240 VAC, 50 Hz 19 VDC, 800mA
Europe: T4190800SE 220-240 VAC, 50Hz 19 VDC, 800 mA

* Specifications are shown on the adapter label.

9033029 Technical Specifications 17

18 Technical Specifications ELS100-8TXUF2

APPENDIX B. FLOW CONTROL

Flow control is a mechanism that controls the flow of data in both
directions to prevent data loss, buffer deadlock, overload conditions and
minimizing communications overhead during transmission. Figure B-1
illustrates flow control for both half and full duplex applications.

Figure B-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 (c on nec ted to po rt Y).The buffer on port Y starts
filling up with data until it reache s a pre-determined threshol d. The packet
which causes the threshold to be exceeded triggers the Flow Control
function on the port fro m which the p acket entered th e switch, in t his 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 back­pressure mecha nism (h alf dupl ex appl ications ). The pa use fram e caus es
Workstation A to stop s ending packets . After a certain amount of tim e 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.
Note that for the full duplex pause frame mechanism to work, the device
connected to the switch port must also support IEEE 802.3x flow control.

The pause frame flow control mechanism supported by the ELS100­8TXUF2 switch conforms with th e IEEE 802.3x specification for full du plex
flow control.

9033029 Flow Control 19

20 Flow Control ELS100-8TXUF2

APPENDIX C.ACRONYMS AND

ABBREVIATIONS

Term Definition

10Base-T 10Mbps twisted-pair Ethernet
100Base-TX 100Mbps twisted-pair Fast Ethernet
100Base-FX 100Mbps fiber optic Fast Ethernet
ANSI American National Standards Institute
ASIC Application Specific Integrated Circuit
CAT5 Category 5
CSMA/CD
IEEE Institute of Electrical and Electronics Engineers
LAN Local Area Network
MAC Media Access Control
LED Light Emitting Diode
MDI Media Device Interface
MDI-X Media Device Interface-crossover cable wiring
RFC Request for Comment
UTP Unshielded Twisted Pair

end-switch

Carrier Sense Multiple Access/Collision Detection

A switch that terminates a branch. Also known
as a leaf switch.

9033029 Acronyms and Abbreviations 21

22 Acronyms and Abbreviations ELS100-8TXFU2

INDEX

10Base-T/100Base-TX

Pinouts, 16
Ports, 12

802.1D, 4, 15

802.2, 15

802.3, 12, 15

802.3i, 15

802.3u, 15

802.3x, 2, 15, 19

A

architecture, 1

B

broadcast throttling, 4

C

certification, 15
client/server network application, 6
connecting network cables, 11
crossover cable, 12
cut-through, 4

D

Data Rate, 15

E

Electrical Specifications, 15
Environmental Specifications, 15

F

Fiber Optic Cable

multi-mode, 11

flow control, 5, 19

802.3x, 19

front panel, 2
front panel components, 2

L

LEDs, 3

M

MDI-X, 12
Memory, 16
mounting the switch

table or shelf, 8
wall, 9

P

performance, 2
Physical Specifications, 16
port LEDs, 3

defined, 3
Port Specifications, 16
Power Adapter Requirements, 17
power cord, 10
power LED, 2

defined, 2
power source, 7
powering the switch, 10

R

rear panel, 3
RJ-45 connectors, 12

S

SC fiber connector, 13
site requirements, 7
Spanning Tree, 5
Standards Compliance

IEEE, 15
store-and-forward, 4

U

Unshielded Twisted Pair (UTP), 11

I

inspecting your shipment, 7

V

Ventilation, 7

W

workgroup hubs, 6

9033029 Index 23

24 Index ELS100-8TXUF2