Cabletron Systems SmartSTACK ELH100 User manual

9033060
SmartSTACK
ELH100-12/24TX
FASTETHERNETHUB
INSTALLATION
AND
USERGUIDE

Notice
9033060 i
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 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
PrintedinTaiwan,R.O.C.
Order Number: 9033060 May 1999
Cabletron, Cabletron Systems, and SmartSTACK are trademarks or registered trademarks of
Cabletron Systems, Inc.
Microsoft, Windows, Windows 95, Windows 98, and Windows NT are either trademarks or
registered trademarks of Microsoft Corporation.
Netscape and Netscape Navigator are trademarks of Netscape Communications Corporation.
All other product names mentioned in this manual may be trademarks or registered trademarks of
their respective companies.
Only qualified personnel should perform installation
procedures.

Notice
ii 9033060
FCC NOTICE
This device complies with Part 15 of the FCC rules. Operation is subject to the following 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 equipment has been tested and found to comply with the limits for a Class A digital
device, pursuant to Part 15 of the FCC rules. These limits are designed to provide reasonable
protection against harmful interference when the equipment is operated in a commercial environment.
This equipment 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 interference in which case the user
will be required to correct the interference at his own expense.
WARNING: Changes or modifications made to this device which are not expressly approved by the
party responsible for compliance could void the user’s authority to operate the equipment.
INDUSTRY CANADA NOTICE
This digital apparatus does not exceed the Class A limits for radio noise emissions from digital
apparatus set out in the Radio Interference Regulations of the Canadian Department of
Communications.
Le présent appareil numérique n’émet pas de bruits radioélectriques dépassant les limites applicables
aux appareils numériques de la class A prescrites dans le Règlement sur le brouillage radioélectrique
édicté par le ministère des Communications du Canada.
VCCI NOTICE
This is a Class A product based on the standard of the Voluntary Control Council for Interference 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.

Notice
9033060 iii
CABLETRON SYSTEMS, INC.
PROGRAM LICENSE AGREEMENT
IMPORTANT: THIS LICENSE APPLIES FOR USE OF PRODUCT IN THE FOLLOWING
GEOGRAPHICAL REGIONS:
CANADA MEXICO
CENTRAL AMERICA
SOUTH AMERICA
BEFORE OPENING OR UTILIZING THE ENCLOSED PRODUCT,
CAREFULLY READ THIS LICENSE AGREEMENT.
This document is an agreement (“Agreement”) between You, the end user, and Cabletron
Systems, Inc. (“Cabletron”) that sets forth your rights and obligations with respect to the Cabletron
software program (“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 Program provided in this
package subject to the terms and conditions of this License Agreement.
You may not copy, reproduce or transmit any part of the Program except as permitted by the
Copyright Act of the United States or as authorized in writing by Cabletron.
2. OTHER RESTRICTIONS. You may not reverse engineer, decompile, or disassemble the
Program.
3. APPLICABLE LAW. This License Agreement shall be interpreted and governed under the
laws and in the state and federal courts of New Hampshire. You accept the personal jurisdiction and
venue of the New Hampshire courts.
4. EXPORT REQUIREMENTS. You understand that Cabletron and its Affiliates are subject to
regulation by agencies of the U.S. Government, including the U.S. Department of Commerce, 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 exporting party.
If the Program is exported from the United States pursuant to the License Exception CIV under
the U.S. Export Administration Regulations, You agree that You are a civil end user of the Program
and agree that You will use the Program for civil end uses only and not for military purposes.

Notice
iv 9033060
If the Program is exported from the United States pursuant to the License Exception TSR under
the U.S. Export Administration 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, Cambodia, Cuba, Estonia, Georgia, Iraq, Kazakhstan,
Kyrgyzstan, Laos, Latvia, Libya, Lithuania, Moldova, North Korea, the People’s Republic of China,
Romania, Russia, Rwanda, Tajikistan, Turkmenistan, Ukraine, 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 direct product of the Program or the technology, if such foreign
produced direct product is subject to national security controls as identified on the U.S. Commerce
Control List, or (iii) if the direct product of the technology is a complete 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 direct product is subject to national security controls as
identified on the U.S. Commerce Control List or is subject to State Department controls under the
U.S. Munitions List.
5. UNITED STATES GOVERNMENT RESTRICTED RIGHTS. The enclosed Product (i)
was developed solely at private expense; (ii) contains “restricted computer software” submitted with
restricted rights in accordance with section 52.227-19 (a) through (d) of the Commercial Computer
Software-Restricted Rights Clause and its successors, and (iii) in all respects is proprietary 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 disclosure by the Government is subject to restrictions set forth herein.
6. EXCLUSION OF WARRANTY. ExceptasmaybespecificallyprovidedbyCabletronin
writing, Cabletron makes no warranty, expressed or implied, concerning the Program (including its
documentation and media).
CABLETRON DISCLAIMS ALL WARRANTIES, OTHER THAN THOSE SUPPLIED TO
YOU BY CABLETRON IN WRITING, EITHER 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 FORCONSEQUENTIAL 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.

Notice
9033060 v
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 agreement (“Agreement”) between You, the end user, and Cabletron Systems
Sales and Service, Inc. (“Cabletron”) that sets forth your 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 Program provided in this
package subject to the terms and conditions of this License Agreement.
You may not copy, reproduce or transmit any part of the Program except as permitted by the
Copyright Act of the United States or as authorized in writing by Cabletron.
2. OTHER RESTRICTIONS. You may not reverse engineer, decompile, or disassemble the
Program.
3. APPLICABLE LAW. This License Agreement shall be interpreted and governed under the
laws and in the state and federal courts of New Hampshire. You accept the personal jurisdiction and
venue of the New Hampshire courts.
4. EXPORT REQUIREMENTS. You understand that Cabletron and its Affiliates are subject to
regulation by agencies of the U.S. Government, including the U.S. Department of Commerce, 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 exporting party.
If the Program is exported from the United States pursuant to the License Exception CIV under
the U.S. Export Administration Regulations, You agree that You are a civil end user of the Program
and agree that You will use the Program for civil end uses only and not for military purposes.

Notice
vi 9033060
If the Program is exported from the United States pursuant to the License Exception TSR under
the U.S. Export Administration 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, Cambodia, Cuba, Estonia, Georgia, Iraq, Kazakhstan,
Kyrgyzstan, Laos, Latvia, Libya, Lithuania, Moldova, North Korea, the People’s Republic of China,
Romania, Russia, Rwanda, Tajikistan, Turkmenistan, Ukraine, 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 direct product of the Program or the technology, if such foreign
produced direct product is subject to national security controls as identified on the U.S. Commerce
Control List, or (iii) if the direct product of the technology is a complete 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 direct product is subject to national security controls as
identified on the U.S. Commerce Control List or is subject to State Department controls under the
U.S. Munitions List.
5. UNITED STATES GOVERNMENT RESTRICTED RIGHTS. The enclosed Product (i)
was developed solely at private expense; (ii) contains “restricted computer software” submitted with
restricted rights in accordance with section 52.227-19 (a) through (d) of the Commercial Computer
Software-Restricted Rights Clause and its successors, and (iii) in all respects is proprietary 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 disclosure by the Government is subject to restrictions set forth herein.
6. EXCLUSION OF WARRANTY. Except as may be specifically provided by Cabletron in
writing, Cabletron makes no warranty, expressed or implied, concerning the Program (including its
documentation and media).
CABLETRON DISCLAIMS ALL WARRANTIES, OTHER THAN THOSE SUPPLIED TO
YOU BY CABLETRON IN WRITING, EITHER 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 FORCONSEQUENTIAL 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.

Notice
9033060 vii
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 agreement (“Agreement”) between You, the end user, and Cabletron
Systems Limited (“Cabletron”) that sets forth your 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 Program provided in this
package subject to the terms and conditions of this License Agreement.
You may not copy, reproduce or transmit any part of the Program except as permitted by the
Copyright Act of the United States or as authorized in writing by Cabletron.
2. OTHER RESTRICTIONS. You may not reverse engineer, decompile, or disassemble the
Program.
3. APPLICABLE LAW. This License Agreement shall be governed in accordance with English
law. The English courts shall have exclusive jurisdiction 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, including the U.S. Department of Commerce, 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 exporting party.
If the Program is exported from the United States pursuant to the License Exception CIV under
the U.S. Export Administration Regulations, You agree that You are a civil end user of the Program
and agree that You will use the Program for civil end uses only and not for military purposes.

Notice
viii 9033060
If the Program is exported from the United States pursuant to the License Exception TSR under
the U.S. Export Administration 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, Cambodia, Cuba, Estonia, Georgia, Iraq, Kazakhstan,
Kyrgyzstan, Laos, Latvia, Libya, Lithuania, Moldova, North Korea, the People’s Republic of China,
Romania, Russia, Rwanda, Tajikistan, Turkmenistan, Ukraine, 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 direct product of the Program or the technology, if such foreign
produced direct product is subject to national security controls as identified on the U.S. Commerce
Control List, or (iii) if the direct product of the technology is a complete 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 direct product is subject to national security controls as
identified on the U.S. Commerce Control List or is subject to State Department controls under the
U.S. Munitions List.
5. UNITED STATES GOVERNMENT RESTRICTED RIGHTS. The enclosed Product (i)
was developed solely at private expense; (ii) contains “restricted computer software” submitted with
restricted rights in accordance with section 52.227-19 (a) through (d) of the Commercial Computer
Software-Restricted Rights Clause and its successors, and (iii) in all respects is proprietary 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 disclosure by the Government is subject to restrictions set forth herein.
6. EXCLUSION OF WARRANTY. Except as may be specifically provided by Cabletron in
writing, Cabletron makes no warranty, expressed or implied, concerning the Program (including its
documentation and media).
CABLETRON DISCLAIMS ALL WARRANTIES, OTHER THAN THOSE SUPPLIED TO
YOU BY CABLETRON IN WRITING, EITHER 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 FORCONSEQUENTIAL 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.

Notice
9033060 ix
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 Representative 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/EEC
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.
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 Engineering Manager Managing Director - E.M.E.A.
___________________________________ ___________________________________
Title Title
Rochester, NH, USA Newbury, Berkshire, England
___________________________________ ___________________________________
Location Location

9033060 Table Of Contents xi
Table Of Contents
Preface........................................................xv
Purpose.................................................xv
Audience................................................xv
Conventions.............................................xv
MessageFormats.....................................xv
KeyboardEntries......................................xv
OtherConventions.....................................xvi
Organization.............................................xvi
1. ProductOverview...............................................1
Description...............................................1
Features.................................................2
FrontPanel...............................................4
OptionalModules..........................................5
RearPanel...............................................7
FeatureSummaries ........................................7
Dual-SpeedArchitecture.................................7
SoftwareDownload.....................................7
Non-volatileParameterStorage ...........................8
ConfigurationandManagementInterfaces...................8
RMON...............................................9
Auto-SensingandAuto-Negotiation ........................9
BootP...............................................10
LEDs...............................................10
FullDuplexMode......................................10
ApplicationExample.......................................10
2. Installation ...................................................13
InspectingYourShipment...................................13
SiteRequirements ........................................13
MountingtheHuborStackonaTableorShelf..................14
MountingtheHubinaRack.................................15
ConnectingHubstotheStack’sBackplane.....................16
InstallinganOptionalModuleintotheHub......................17
UsingaSwitch/MediaModule................................18
ConnectingaTerminaltotheConsolePort.....................19
ConsolePort(Out-of-Band)Connections...................19
RemoteManagementviatheConsolePort..................20
In-BandConnections...................................20
AgentModule.........................................21
PoweringtheHub.........................................22
NetworkCableRequirements................................23
Copper..............................................23
Fiber................................................23
10Base-T/100Base-TXPorts................................24
100Base-FXFiberPorts....................................25

xii Table Of Contents ELH100-12/24TX
3. ELH100-12/24TXUserInterface..................................27
Overview ...............................................27
UserAccess.............................................28
FactoryDefaults..........................................28
MenuHierarchy..........................................29
MainMenu..............................................30
SystemInformationMenu ..................................31
Reset..................................................32
Exit....................................................32
SystemConfigurationMenu.................................33
SNMPConfigurationMenu..................................35
SNMPCommunities...................................36
SNMPTrapDestinations................................37
HubConfigurationMenus...................................38
PortConfigurationMenu ...................................41
PortAdministrativeStatusControlMenu...................41
ModulePortConfigurationMenu .........................42
BackupPortControlMenu..............................43
TFTPDownloadMenu.....................................44
XMODEMDownloadMenu.................................45
UserPasswordMenu......................................46
ConsoleConfigurationMenu................................47
HubStatisticsMenu.......................................48
PortStatisticsMenu.......................................50
4. Configuring&MonitoringtheHub.................................53
CommonTasks..........................................53
SettingPasswordProtection................................53
AssigninganIPAddress...................................54
CheckingNetworkConfigurationStatus........................54
ConnectingviaTelnet .....................................55
SettingSNMPManagementAccess..........................55
ViewingHubStatistics.....................................56
DownloadingaSoftwareUpgrade............................56
DownloadingViatheSerialPort..........................56
DownloadingViaTFTP.................................57
ConfiguringPortOperation..................................58
SpanningTree...........................................58
SettingaDefaultGateway..................................58
ConfiguringBootP........................................59
5. Web-BasedManagement.......................................61
NavigatingtheWebBrowserInterface.........................61
MainMenu..............................................62
SystemInformation .......................................63
StackBrowser...........................................64
FrontPanel..........................................65
AgentConfiguration ...................................66
HubConfiguration.....................................67

9033060 Table Of Contents xiii
HubBackplane .......................................68
PortConfiguration.....................................69
PortBackup..........................................70
SwitchModuleStatistics................................71
MIBBrowser.............................................72
RMONBrowser...........................................73
EthernetStatistics.....................................74
PacketsPieChart.....................................76
ErrorPacketsRatio....................................77
HistoryControlEntry...................................78
HistoryDataEntry.....................................79
RateBarChart........................................81
Utilization............................................82
Alarm...............................................83
EventTable..........................................85
LogTable............................................86
6. SNMPManagement............................................87
TheSNMPProtocol .......................................87
MIBObjects .............................................88
RFC1213(MIB-II).....................................88
RFC2108(Multi-segmentRepeater).......................89
RFC1643(Ethernet-like)................................89
RFC1757(RMONMIB).................................89
CabletronProprietaryMIBExtensions......................89
CompilingMIBExtensions:CabletronWebsite...................90
APPENDIX A. TechnicalSpecifications...............................91
General.................................................91
StandardsCompliance .................................91
Certification..........................................91
DataRate............................................91
EnvironmentalSpecifications.............................91
ElectricalSpecifications.................................92
Physical.............................................92
PortSpecifications........................................93
ConsolePort.........................................93
10Base-Tand100Base-TXPorts.........................93
MDI/MDI-XCrossoverCableWiring.......................94
PowerCordSetRequirements...............................94
GeneralRequirements..................................94
Country-SpecificRequirements...........................95
APPENDIX B. Acronyms&Abbreviations.............................97
INDEX

9033060 Preface xv
PREFACE
Purpose
Thisguideprovides information about the features and applications ofthe
Cabletron ELH100-12/24TX dual-speed hub as well as instructions for
configuring and monitoring the hub.
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:
Keyboard Entries
This guide uses the following conventions for keyboard entries:
•When you read “enter,” type the text and press the [Enter] key.
•Example: Enter the Gateway IP address and press the [Enter] key.
•Whenyouread“select,”highlightthemenuitemandpressthe[Enter]
key.
A note informs you of special circumstances.
A caution indicates the possibility of equipment damage.

xvi Preface ELH100-12/24TX
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: Describes the features of the hub, front
and rear panel components and application examples.
Chapter 2. Installation:Describesthecontentofyourhubshipment,lists
site requirements, and provides mounting instructions. Instructions for
making connections and powering up the hub are provided as well.
Chapter 3. ELH100-12/24TX User Interface: Describes the user
interface console menus and lists the factory defaults for system settings.
Each of the console menus are presented along with a description of the
selections/fields available within each menu.
Chapter 4. Configuring and Monitoring the Hub: Describes common
tasks and associated steps required to configure the hub, and covers
common hub and network considerations required to ensure system
integrity.
Chapter 5. Web-Based Management: Describes the tasks and
associated steps required to configure the hub via the embedded Web
agent. It also covers information on using the RMON Browser.
Chapter 6. SNMP Management: Describes how the Simple Network
Management Protocol (SNMP) communication protocol is used to
manage the hub, and provides a description of industry standard and
proprietary Managed Information Bases (MIBs) supported by the hub.
Appendix A. Technical Specifications: Provides a list of standards
compliance and certifications as well as physical and operational
specifications.
Appendix B. Acronyms and Abbreviations: Provides definitions for a
list of common acronyms and abbreviations used within the user guide
and the networking industry.

9033060 Product Overview 1
1. PRODUCT OVERVIEW
Description
This installation and user guide describes Cabletron’s ELH100-12/24TX
FastEthernet hubs.These hubs provide the easiest method of upgrading
your network to Fast Ethernet. There’s no need to replace your existing
network infrastructure. Just add Cabletron’s hub to your network and
attach any 10 or 100 Mbps device to any port on the hub. These hubs
provide both a 10 Mbps segment needed for common file transfers, as
well as a 100 Mbps segment for relieving serious network congestion,
running multimedia applications, or satisfying power users.
These hubs include a wide range of configuration options. They can be
stacked together(up to 6 high) to form a dual-speed network ofup to 144
ports. With a Class II rating, they can also be easily cascaded to additional
10 or 100 Mbpshubs. With an optional switch/media module, you can link
the hub’s 10 Mbps and 100 Mbps segments together to form a bridged
network, allowing traffic to pass between the segments when required.
Optional switch/media modules are also provided for
10Base-T/100Base-
TX and 100Base-FX media types.
The fiber modules allow you to connect
the stack to remote locations up to 1.24 miles away (2 kilometers). Each
of these switch/media modules provide a switched connection to the
stack, breaking the two-hop count for Fast Ethernet by placing all the
devices attached to the module in a separate collision domain. The
modules operate at full wire speed with full address and frame filtering.
They automatically learn node addresses from the network and store
them in a Media Access Control (MAC) address forwarding table.
Incoming packets are then forwarded on to the stack or filtered based on
the addresses in the packet.
Theoptional RMON/SNMP/Web Agent Moduleprovides abroad range of
management options. It includes a standards-compliant Simple Network
Management Protocol (SNMP) agent. The SNMP agent allows network
management station applications to collect and present status and
performance information about the stack, as well as providing the ability
to configure and control functions on the stack. The module also supports
Remote Monitoring (RMON) for Statistics, History, Alarm and Event
groups (Groups 1-3, 9).
Network management canbe performed in-band usingTCP/IP,Telnet, or
viaa SLIPconnection tothe serialconsole port ontheAgentModule.
This
module also includes a built-in Web agent that provides management
access via common http browsers such as Netscape Navigator and
Microsoft’s Internet Explorer. In addition, the console port allows out-of-
band management using a PC, terminal, or modem connection.

2 Product Overview ELH100-12/24TX
The ELH100-12/24TX hub is desktop or rack-mountable. LEDs on the
front panel provide information about theoperating status of the hub. The
back panel contains the power connector, redundant power connector,
and stack connectors. The side panel includes two fans that maintain
ventilation and cooling for internal hub components.
This chapter provides the following information:
•Product Description
•Features
•Front and Rear Panel Component Descriptions
•Feature Summaries
•Application Example
Features
•Ports:
- 12/24 dual-speed 10Base-T/100Base-TX ports using RJ-45
connectors (MDI-X)
Note: Port 12/24 includes a toggle switch for MDI-X or MDI connection
- 2 SCSI connectors for stacking hubs
- 1 redundant power unit socket
•Optional Switch/Media Modules:
- ELH-ULSW-TX: 10Base-T/100Base-TX Module* provides 1
RJ-45 port for a bridged connection to the stack, as well as
bridging between the 10 and 100 Mbps stack segments
* Includes MDI-X or MDI connection (only 1 connection active at a time)
- ELH-ULSW-F2: 100Base-FX Module provides 1 SC
multimodefiberopticportforabridgedconnectiontothestack,
as well as bridging between the 10 and 100 Mbps stack
segments
•Optional RMON/SNMP/Web Agent Module:
- ELH100-SNMP: Agent Module provides SNMP, RMON, and
Web management support for the stack. Only two agent
modules are allowed in a stack: one active and one in standby
mode.
•Hub Architecture:
- 2 segment repeaters for 10 and 100 Mbps
- 3 or 6 Quad Controllers with 4 10/100 ports, 2 10/100 segment
repeaters, cascaded backplanes, serial management interface
- IEEE 802.3u auto-sensing for 10/100 Mbps speed operation
on all RJ-45 ports (not required on attached device)
- Up to 6 hub units can be stacked together, supporting up to
144 connections