Cabletron Systems ELH100 User Manual

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SmartSTACK

ELH100-12/24TX

FASTETHERNETHUB

INSTALLATION

AND

USERGUIDE

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Notice

Only qualified personnel should perform installation procedures.

NOTICE

CabletronSystems 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 DAMAGESWHATSOEVER (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

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 o r registered trademarks of

their respective companies.

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Notice

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 accordancewith the operator’s manual, may cause harmful interference to radio communications. Operation of this equipmentin a residential area is likely to cause interference in which case the user will be required to correct the interferenceat 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 author ity 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 l e 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.

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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 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 T HE TERMS OF THIS AGREEMENT,RETURN THE UNOPENED PRODUCT TO CABLETRON OR YOUR DEALER, IF ANY,W ITHIN TEN (10) DAYSFOLLOWING THE DATEOF RECEIPT FOR A FULL REFUND.

IF YOU HAVE ANY QUESTIONS ABOUT THIS AGREEMENT, CONTACT CABLETRON SYSTEMS (603) 332-9400. 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.

MEXICO CENTRAL AMERICA SOUTH AMERICA

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

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Notice

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 Sections1 or 2 of this Agreement, You agree not to (i) reexportor 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, T ajikistan, 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 s uccessors, and (iii) in all respects is proprietary data belonging to Cabletron and/orits 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 documentationand 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 MERCHANTABILITYAND FITNESS FOR A PARTICULAR PURPOSE, WITH RESPECT TO THE PROGRAM, THE ACCOMPANYING WRITTEN MATERIALS, AND ANY ACCOMPANYING HARDWARE.

7. NO LIABILITY FOR CONSEQUENTIAL DAM AGES. IN NO EVENT SHALL CABLETRON OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER (INCLUDING, W ITHOUT LIMITATION, DAMAGES FOR LOSS OF BUSINESS, PROFITS, BUSINESS INTERRUPTION, LOSS OF BUSINESS INFORMATION, SPECIAL, INCIDENTA L , 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. B ECAUSE SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OFLIABILITY 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.

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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 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 AN D THE LIMITATION OF WARRANTY AND DISCLAIMER OF LIABI LITY. 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 R ECEIPT FOR A FULL REFUND.

IF YOU HAVE ANY QUESTIONS ABOUT THIS AGREEMENT, CONTACT CABLETRON SYSTEMS (603) 332-9400. 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.

4. EXPORT REQUIREMENTS. You understand that Cabletronand 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.

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Notice

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 Sections1 or 2 of this Agreement, You agree not to (i) reexportor 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, T ajikistan, 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.

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 documentationand 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 MERCHANTABILITYAND FITNESS FOR A PARTICULAR PURPOSE, WITH RESPECT TO THE PROGRAM, THE ACCOMPANYING WRITTEN MATERIALS, AND ANY ACCOMPANYING HARDWARE.

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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 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 AN D THE LIMITATION OF WARRANTY AND DISCLAIMER OF LIABI LITY. 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 R ECEIPT FOR A FULL REFUND.

IF YOU HAVE ANY QUESTIONS ABOUT THIS AGREEMENT, CONTACT CABLETRON SYSTEMS (603) 332-9400. 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.

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Notice

7. NO LIABILITY FOR CONSEQUENTIAL DAMAGES. IN NO EVENT SHALL CABLETRON OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER (INCLUDING, W ITHOUT LIMITATION, DAMAGES FOR LOSS OF BUSINESS, PROFITS, BUSINESS INTERRUPTION, LOSS OF BUSINESS INFORMATION, SPECIAL, INCIDENTA L , 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. B ECAUSE SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OFLIABILITY 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.

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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.

Notice

Wethe 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

ComplianceEngineeringManager Managing Director - E.M.E.A.

___________________________________ ___________________________________

Title Title

Rochester, NH, USA Newbury,Berkshire,England

___________________________________ ___________________________________

Location Location

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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

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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

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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

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PREFACE

Purpose

Thisguide provides information about thefeatures and applicationsofthe Cabletron ELH100-12/24TXdual-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 ManagementInformation 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 cau tion indicates the possibility of equipment damage.

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,”highlightthe menu itemand pressthe[Enter]

key.

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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 designatefields within the console menus

• 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. Chapter2. Installation: Describesthecontentof yourhubshipment, 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 interfaceconsolemenus andlists the factorydefaults forsystemsettings. 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 InformationBases (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.

(Example: CONNECTION).

xvi Preface ELH100-12/24TX

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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 stackedtogether (up to 6 high) toform a dual-speednetwork of up to 144 ports. Witha Class IIrating, theycan also beeasily cascaded toadditional 10or 100Mbps hubs. With an optionalswitch/mediamodule,you canlink 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/mediamodules are also provided for TX and 100Base-FX media types. 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 forwardedon to the stack or filteredbased on the addresses in the packet.

TheoptionalRMON/SNMP/WebAgent Moduleprovidesa broad rangeof 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 alsosupports Remote Monitoring (RMON) for Statistics, History, Alarm and Event groups (Groups 1-3, 9).

Networkmanagementcan be performedin-band using TCP/IP,Telnet,or viaa SLIPconnectionto the serialconsoleport on theAgent Module. 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-ofband management using a PC, terminal, or modem connection.

The fiber modules allow you to c onnect

10Base-T/100Base-

This

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The ELH100-12/24TX hub is desktop or rack-mountable. LEDs on the front panel provideinformation aboutthe operatingstatus ofthe 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:

• Optional Switch/Media Modules:

• Optional RMON/SNMP/Web Agent Module:

• Hub Architecture:

- 12/24 dual-speed 10Base-T/100Base-TXports 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

- 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 connectionactive at a time)

- ELH-ULSW-F2: 100Base-FX Module provides 1 SC multimodefiberopticportfor a bridgedconnectionto thestack, as well as bridging between the 10 and 100 Mbps stack segments

- ELH100-SNMP: Agent Module provides SNMP, RMON, and Web management support for the stack. Only two agent modulesare allowedin a stack:one activeand one in standby mode.

- 2 segment repeaters for 10 and 100 Mbps

- 3 or 6 Quad Controllerswith 4 10/100 ports, 2 10/100 segment repeaters,cascadedbackplanes,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

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• Switch Architecture (for optional switch/media modules):

- Bridges 10 and 100 Mbps repeater buses for the stack

- 200 Mbps throughput

- 2 MB packet buffering

- Store-and-forward switching

Module: 4096 address forwarding table per segment

- Forwarding: 14,880 packets-per-second (64 byte packets) @10 Mbps; 148,800 pps @100 Mbps

- Filtering: 14,880 packets-per-second (64 byte packets) @10 Mbps; 148,800 pps @100 Mbps

• Network Management:

- SNMP compliant agent: MIB II (RFC 1213); Multi-segment Repeater MIB (RFC 2108), Ethernet-like MIB (RFC1643); RMON - Statistics, History, Alarm and Event groups per segment (RFC 1757); private MIB extensions

- Access via in-band, Internet browser, or Telnet

- Console port (RS-232, male DB-9 connector, null modem) supports access via direct, modem, or SLIP connection

- BootP for IP address configuration

• Reliability:

- Automatic partition and reconnection

- Automatic polarity detection (and inversion if needed)

- Automatic cascade bypass if a hub in the stack is powered off

- Agent Module supports power-on self test, backup agent module, port link backup for up to 15 pairs, and intrusion detection

• Software:

- Extensive diagnostics for product testing and troubleshooting

- Firmware upgrades using the console port or in-band with TFTP

• LED Indicators:

- System: Power, Switch

- 10 and 100 Mbps segments: Activity, Collision

- 10Base-T/100Base-TX Ethernet hub ports: link/partition/speed

- Switch/Media modules: Collision, Activity, Full/Half duplex, Link

- Agent Module: Active

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Front Panel

Figure 1-1 shows the front panel of the Cabletron ELH100-24TX. Table 1-1 defines the ELH100-12/24TX front panel components.

Figure 1-1. ELH100-24TX Front Panel

XXXX XXXX XXXX

ELH100-24TX

Table 1-1. Front Panel Components

Name Function

PWR LED Lightssteady green toindicate power issuppliedto the

SWITCH LED Lights steady green to indicate that the Switch/Media

Segment LEDs (10M, 100M)

Port LEDs On indicates link; off indicates no link; and flashing

10Base-T/100Base-TX RJ-45 ports

hub. Off i ndicat es no power is supplied to the hub.

Module is active. Flashing indicates that another module in the stackis active. (Ifthe active module fails, you must removeit from the stack toinitialize a backup switch/media module located in another hub in the stack.)

Activity: Flashing indicates traffic on the segment. Collision: Flashing indicates t hat two or more devices

attempted to transmit data at the same time. (This is a normal situation under Ethernet CSMA/CD.)

indicates that the port has been partitioned. Yellow indicatesa 10 Mbps connection; green indicates a 100 Mbps connection.

Copper ports using RJ-45 port connectors. These ports are wired MDI-X, except for the last port which includes a selection switch for MDI-X or MDI connection.

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Optional Modules

Figure 1-2 shows the optional modules available for the Cabletron ELH100-12/24TX. Table 1-2 defines the optional module components.

Figure 1-2. Optional Modules

Table 1-2. Optional Module Components

Module Components

10Base-T/100Base-TX

100Base-FX

Agent Console port: Male DB-9 connector configured as a

Ports: Copper ports using RJ-45 connectors. Use either the MDI-X or MDI connector when attaching a device to this module. (See 10Base-T/100Base-TX Ports on page 24 for a detailed description of these ports.)

Mode switch: If the attached device must operate at 100 Mbps, full duplex, then set this switch to 100Full; otherwise, set it t o Auto.

Port LEDs: See Table 1-3 for details. Ports: Fiber ports using SC connectors for uplink. (See

100Base-FX Fiber Ports on page 25 for a detailed description of these ports.)

Mode switch: If the attacheddevice must operate atfull duplex, set this switch t o Full; otherwise, set it to Half.

Port LEDs: See Table 1-3 for details.

null modem connection for serial ou t-of-band management using the console m enus, or for in-band management when used with SLIP protocol.

Active LED: On when the Agent Module is active; when the module is in standby mode, and flashing if the module failed the power-on self-test.

Only two agent modules are allowed in a stack: one active and one in standby mode.

off

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Figure 1-3 shows the Collision, Activity, Full/Half duplex, and Link LEDs forthe switch/media modules. These LEDsare positioned to theleft of the ports. In addition, the 10Base-T/100Base-TX module includes a 100M LED to right of the ports to indicate speed (where On indicates that the port is operating at 100 Mbps, and Off indicates 10 Mbps).

Figure 1-3. Port LEDs on the Switch/Media Modules

Collision

Full/Half

Activit y

Link

Table 1-3 definesthe performance of the port LEDs on the optional modules.

Table 1-3. Port LEDs for Modules Defined

Name Function

Collision Flashing: Two ormore devices attempted to transmit dataat the same

Activity Flashing: Indicates the presence of transmit and/or receive activity.

Full/Half On: Indicates the port is in full duplex mode.

Link On: Indicates a valid connection (link) on t he associated port.

100M* On: Indicates that the port is operating at 100 Mbps.

* This LED only appears on the 10Base-T/100Base-TX module.

time. (Normal situation under Ethernet CSMA/CD.)

Off: Indicates the absence of transmit or receive activity.

Off: Indicates the port is in half duplex mode.

Off: Indicates no link on the associated port.

Off: Indicates that the port is operating at 10 Mbps.

The Switch/Mediamodules do not support Spanning Tree, which is intended to prevent network loops from forming. Thereis no loop detection. The user is cautioned to understand and avoid configurations that can create a loop.

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Rear Panel

Figure 1-4 shows the ELH100-12/24TXrear panel and Table 1-4defines the rear panel components.

Figure 1-4. ELH100-12/24TX Rear Panel

Table 1-4. Rear Panel Components

Name Function

Power Connector Provides AC power to the switch. Redundant Power

Connector

Stack Connectors Allows you to stack up to 6 unit s to form a dual-speed

This connector is provided for a redundant power unit (RPU) which can supply power to the hub if its primary power supply fails. (Refer to the m anual provided with the RPU for further details.)

network of up to 144 ports.

Feature Summaries

The following summaries describe ELH100-12/24TX features in areas such as standards compliance, functionality, performance, and options.

Dual-Speed Architecture

The ELH100-12/24TX hub provides both 10 and 100 Mbps repeater buses. The speed of the device connected to each port is automatically detected by the hub, and the port attached to the appropriate bus. Up to 6 hubscan be stacked together to form a dual-speed network. An optional switch/mediamodule canbeadded to anyhub in thestackto bridgetraffic between the 10 Mbps and 100 Mbps repeater buses as required.

Software Download

The ELH100-12/24TX h ubs support the industry-standardTrivial File Transfer Protocol (TFTP) for downloading agent software. All hub softwareis storedin a 2 MB flashROM. Thedownload featureallows you to easily install software upgrades to the Agent Module. Software can alternatively be downloaded via the serial console port using the XMODEM protocol. You can download to permanent flash ROM, or you can download to temporary storage in RAM for test purposes.

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A TFTP or XMODEM software download is invoked via the console menus. A TFTPdownload can also be invoked via SNMP or Web-based manager.

Non-volatile Parameter Storage

All important operating parameters,such as management data and port configurations,are storedinnon-volatileFlashmemory. These values are retained when the hub experiences power interruptions or is powered down for normal maintenance.

Configuration and Management Interfaces

TheELH100-12/24TXhub, or attached stack, can be managedusing any of the following methods:

• Serial console, out-of-band or in-band

An RS-232 connection, using a DB-9 connector, is included on the AgentModule for system management.Serial consolemanagement can be performed out-of-band using a terminal or computer running communications software. You can connect directly to the RS-232 port on the Agent Module, or make a connection via a modem. See Chapter 3, ELH100-12/24TX User Interface, for information on managingthe ELH100-12/24TX hub(or stack)via the serialconsole.

You can also make an in-band connection to the RS-232port on the Agent Module with SLIP protocol. Using this kind of connection, you can manage the system via any of the methods listed below.

• Telnet, in-band (over Ethernet)

The hub supports management through a Telnet connection using the TCP/IP protocols. Telnet is performed using a terminal or computer running communications software. See Chapter 3, ELH100-12/24TX User Interface, for information on managing the system via Telnet. Global user name and password protection for changing the operating parameters of the hub is provided.

• Web-based network manager, in-band

The system can be managed over HTTP protocol with a Web browser (Internet Explorer 3.0 or above, or Netscape Navigator 3.0 or above).Standard agent MIBs embedded in the hub provide basic SNMP management through an embedded graphic interface.

• SNMP-based network manager, in-band

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

Management security protection is provided based on SNMP community names. See Chapter 6, SNMP Management, for more information.

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RMON

RMON (Remote Monitoring) is a facility used to manage networks remotelywhileprovidingmulti-vendorinteroperabilitybetweenmonitoring devices and management stations. RMON is defined by an SNMP MIB. This MIB is divided into nine different groups, each gathering specific statistical information or performing a specific function. RMON-capable devices gather network traffic data and then store them locally until downloaded to an SNMP management station.

The ELH100-12/24TX supports four of the nine groups of RMON defined for Ethernet networks on a per segment basis. Specifically, these are:

• Statistics:a functionthat maintains countsof networktraffic statistics

such as number of packets, broadcasts, collisions, errors, and distribution of packet sizes.

• History: a function that collects historical statistics based on user-

definedsamplingintervals.The statisticalinformationcollectedis the same as the Statistics group, except on a time stamped basis.

• Alarm:a function that allowsmanagerstoset alarmthresholdsbased

on traffic statistics. Alarms trigger other actions through the Event group.

• Event: a function that operates with the Alarm group to define an

action that will be taken when an alarm condition occurs. The event may write a log entry and/or send a trap message.

Becausethe Agent Modulemustbe attached toeither the 10or 100Mbps stack segment, RMON can only be activated for one segment at a time. You must therefore use an out-of-band connection to the Agent Module to select the segment to activate for RMON. However, note that RMON statistics and other information can only be viewed using a connection to the on-board web agent or via other compatible SNMP management applications.

Auto-Sensing and Auto-Negotiation

Auto-sensingis a process that permits the hub to automaticallyselect the operational speed of its ports. When an RJ-45 port on the base unit is connected, the hub detects and configures the port to the speed of the network the port is connected to, either 10 Mbps or 100 Mbps. Autosensing is configurable i n the Port Configuration Menu of the console menus or via SNMP.

The 10Base-T/100Base-TX optional modules support auto-negotiation. The port automatically negotiates the best connection possible with the attached device. However, if the attached device must operate at full duplex,thenit must alsosupportauto-negotiation.Otherwise,you can set the mode manuallyusing the mode selection switchon themodule, or via the management agent.

The 100Base-FX module does not supportauto-negotiation.You needto configure the duplex setting via the front panel switch.

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BootP

The Bootstrap Protocol (BootP) provides for the capability of passing configuration information to hosts on a TCP/IP network. Using this process, network devices do not need to be configured before they can communicate using the TCP/IP protocol suite. The ELH100-12/24TX uses BootP to automatically configure IP address information without requiring access to the console menus. BootP operation is configurable usingtheSystemConfigurationMenu of theconsolemenus,the on-board Webagent,orviaSNMP.

LEDs

The port LEDson the hub unit providea quick and accurate displayof the integrity of hub connections, indicating link and partition for each of the ports.The port LEDs on the optional switch/mediamodules indicate Link, Activity, Collision, Full/Half duplex mode, and speed (100M) for each of

the ports.

The 100M LED appears only o n the 10Base-T/ 100Base-TX module.

Full Duplex Mode

Fullduplexmodeissupportedon the optionalswitch/mediamodules.This mode of operation can double the throughput of port connections, by disabling the collision detection portion of the Ethernet Carrier Sense MultipleAccesswithCollisionDetection(CSMA/CD)protocol,allowingfor two-way traffic. Full duplexis configurable usingthe Duplex parameterin the Switch/Media Menu of the console menus or via SNMP.

Application Example

Theexplodingpopularityof theInternetand ofcorporateintranets, as well as new, high-bandwidth desktopapplications, are driving the demand for Fast Ethernet. The need to gradually phase in Fast Ethernet networks, without abandoning existing 10 Mbps network segments, is driving the need for economical dual-speednetwork solutions.

TheELH100-12/24TXhubsare idealforgraduallybuildingup thenetwork infrastructure needed to meet the demands of today’s data intensive applications, while retaining the use of legacy network equipment. The hubs’ low cost, high port count, and stacking capability make them attractive and affordable for dedicated 10/100 Mbps connectionsto the desktop. In addition, extensivefeatures, including redundant links, port security, and micro-segmentation of bus connections, provide the management needed for the workgroup and local backbone.

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Using the ELH100-12/24TX hub in an application example for client/ server networks, users can be connected directly to the local network, regardless of whether they are operated at either 10 or 100 Mbps. Up to 144 connections can be supported by stacking up to 6 hubs. Being a ClassII hub, additional10Mbpsor 100 Mbpshubs can be attached to the stack.Theoptionalmodules provide full duplexswitchedconnectionsthat can improve workstation performance in a client/serverenvironment, or be used to aggregate traffic on the stack to the local backbone.

Figure 1-5. Client/Server Network Application

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2. INSTALLATION

Inspecting Your Shipment

Whenyou receive the shipment ofyour hub, check the packagecontents and make sure you have the following items:

• ELH100-12/24TX dual speed Ethernet hub

• Mounting ears and mounting screws

• Four rubber feet

• Stack cable

• Power cord

• This document

Site Requirements

Before you install the hub, make sure the site meets the following requirements:

• Mounting

Provide a flat table, shelf surface, or an optional 19 in. (48.3 cm) equipment rack.

Usean EIA standard equipmentrack thatis groundedand physically secure.

• Power source

Provide a power source within six feet (1.8 m) of the installation location. This source must provide 100 VAC to 240 VAC, and 50 Hz to 60 Hz power,with a 50 VA minimum. Power specificationsfor the hub are shown in Appendix A, “Technical Specifications.”

Primaryvoltage selectionwithin the above rangesis automatic and requires no user action.

• Environmental

Install the ELH100-12/24TX hub in a dry area, with adequate air circulation.Avoid placing the hub in directsunlight ornear other heat sources, such as hot-air vents. For temperature and humidity specifications,see Appendix A, “Technical Specifications.”

• Ventilation

Do not restrict airflowby covering orobstructing airinlets on theside of the hub.

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Mounting the Hub or Stack on a Table or Shelf

You can mount a standalone hub (or a stack of up to six hubs) on a table orshelf. Locate thehub (stack)in a positionthat allows accessto the front panel RJ-45 ports, visibility of the port LEDs, and access to the power cord. Make sure that the mounting surface can safely support the hub (stack) and that there is adequate space around the hub (stack) for ventilation and cooling.

1. Thehub ships withfour(4) rubber feet.Stickthe self-adhesiverubber foot pads on each of the four concave spaces located on the bottom of the hub. The rubber foot pads cushion the hub against shock/ vibrations and provide space between each hub for ventilation.

2. If you want to stack hubs, repeat step 1 for each hub to be stacked. Place thefirst hub on a firmflat surface where you want to install the stack. Stack the other hubs on top of this unit.

3. Refer to "ConnectingHubs to the Stack’s Backplane" on page 16.

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Mounting the Hub in a Rack

The hub ships with two (2) multi-position mounting ears and four (4) mounting screws.

The mounting screws are used to attach the mounting ears to the hub. Once the ears are attached to thehub, you will need to provideappropriatescrews to mount the hub in a rack.

Figure 2-1 shows the orientation of the mounting ears for attaching the ears to the hub for a rack mount application. Mount the hub with the front panel facing forward. Do the following:

1. Mountoneof theearsto the hubusingtwo (2)ofthe suppliedscrews.

Repeat this step for the other side of the hub.

2. Slide the hub into the rack and align the holes in the rack mounting

ears with the holes in the rack rails.

3. Insert and tighten appropriate rack-mountingscrews (not provided).

4. Refer to "Connecting Hubs to the Stack’s Backplane" on page 16.

Figure 2-1. Mounting the Hub in a Rack

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Connecting Hubs to the Stack’s Backplane

The hub ships with a stack cable.

The hubs support a power-off bypass feature which allows traffic to pass freely across the stack’s backplane, even if one or more of the hubs are powered off.

Figure 2-2 shows how the stack cables are cascaded between the hubs ina stack (rack).Toconnect up tosix hubstothe backplane, plug oneend of the stack cable in the "Out" port of the top hub and the other end to the "In" port of the next hub. Repeat this step for each hub in the stack (or rack). Form a simple chain starting at the Out port on the first hub and ending at the In port on the last hub.

Figure 2-2. Connecting Hubs to the Stack’s Backplane

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Installing an Optional Module into the Hub

Optionalmodulesareavailableformediaextensionand internalswitching between repeater buses and management.These modules can be installed into the modular slots on the left side of the hub. The Agent Module must be installed in the lower slot, and all other modules in the upper slot.

DO NOT i nstall slide-in modules with the hub powered on.Besureyoupower off the hub before installingany module.

To install an optional module into the hub, do the following:

1. Disconnect power to the hub.

2. Removethe blankmetalplate (ora previouslyinstalledmodule) from

the appropriate slot by removing the two screws with a flat-head screwdriver.Aswitch/mediamodule can beinstalledin theupperslot on the frontof thehub. AnAgent Modulecan be installedin thelower slot on the front of the hub.

3. Before opening the package that contains the module, touchthe bag

to the hub casing to discharge any potential static electricity.

4. Remove the module from the anti-static shielded bag.

5. Holding the module level, guide it into the carrier rails on each side

and gently push it all the way into the slot, ensuring that it firmly engages with the connector.

Figure 2-3. Installing an Optional Module into the Hub

6. If you are sure the module is properly mated with the connector,

tighten the retainer screws by hand to secure the module in the slot.

7. Connect power to the hub.

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Using a Switch/Media Module

The 10 and 100 Mbps repeater buses in the hub can be linked together by installinganoptionalswitch/mediamodule in theupperslot on thefront panel. Theswitch/mediamoduleis used whentraffic must be passedto adestination in the other segment, when broadcast traffic is sent, or when the destination isunknown. The switch/mediamodulepasses traffic betweenthe source and destination segment at full duplex, using store-and-forward processing.

Multipleswitch/mediamodules may beinstalledin astack, but onlyone of the modules will actively bridge the 10/100 Mbps repeater buses. If the active switch/mediamodule fails, it must be removed from the hub to activate the standby module.

Table 2-1. Optional Modules

Part Number Functions Description

ELH-ULSW-TX 10Base-T/

100Base-TX, plus internal switching

ELH-ULSW-F2 100Base-FX-

MM, plus internal switching

ELH100-SNMP RMON/SNMP/

Web Management

Single-port RJ-45 uplink module using MDI-X and MDI connectors, with internal switching bet ween the 10 and 100 Mbps repeater buses.

2-port MultiMode (MM) fiber uplink module using SC fiber connectors, with internal switching between the 10 and 100 Mbps repeater buses.

Agent Module used to manage the hub (or attached stack). Includes RS-232 serial port for console connection. One backup agent module can be installed in the stack.

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Connecting a Terminal to the Console Port

The console port is a serial RS-232 interface port that enables a connection to a terminal for performing hub monitoring and configuration functions. The terminal may be a PC or workstation running terminal emulation s oftware, or a terminal configured as a Data Terminal Equipment(DTE) connection.Alternatively,this port can beconnected to an external modem to enable remote dial-in management. You can use the out-of-band management program (described in the next chapter) over a standard modem connection. Or, by running SLIP protocol over a modem connection, you can use in-band management applicationssuch as the Web agent embedded in the Agent Module or third-party SNMP network management software.

If you connect a terminal to the console portprior to powering on thehub, you can observe the progressand results of the power-up diagnosticsas the hub goes through its initialization process.

The console port connector is configured as a male null modem connection using a male DB-9 (see Table A-1 for pinouts). A standard straight-throughwired RS-232cableis supplied with theAgentModule for connecting to this interface. This cable is shielded to comply with emissions regulations and requirements.

Console Port (Out-of-Band) Connections

To connect the ELH100-12/24TX console port to a terminal, do the following:

1. Connect a VT100 compatible terminal or a PC running a terminal

emulation program to the console port (Figure 2-4). Use the nullmodem cable provided with the Agent Module, or use a null modem connection that complies with the wiring assignmentsshown in Appendix A.

Figure 2-4. Connecting a Terminal to the Console Port

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2. Connectoneend ofthe interfacecabledirectlyto theAgent Module’s console port and tighten the retaining screws.

3. Connect the other end of the interface cable to a terminal (in some instances, an adapter may be required to make this connection).

4. From your terminal, start the terminal emulation program.

5. Configure the terminal to the following communication settings:

VT100emulation,9600 baud, noparity, 8 databits, 1 stop bit, noflow control, ASCII character set.

Remote Management via the Console Port

Configure the Hub Site - Connect the Agent Module’s DB-9 serial port

to the modem’s serial port using standard cabling. For most modems using a 25-pin port,you will have to provide an RS-232 cable witha 9-pin connector on one end and a 25-pin connection on the other end. You do not have to set the modem at the hub’s site, because the hub will automatically configure it to auto-answer mode.

Configure the Remote Site - At the remote site, connect the PC’s COM port(COM 1~4)to themodem’s serialport. Set terminalemulation typeto VT100, specify the port used by your PC (i.e., COM 1~4), then set communicationsto 8 data bits, 1 stop bit, noparity, 9600 bps, and no flow control.

In-Band Connections

Prior to accessingthe Agent Module via a network connection, you must configure it with a valid IP address, subnet mask, and default gateway using an out-of-band connection or the BOOTP protocol.

The Agent Module will automaticallyissue BOOTP requests if the IP add ress is set to "0.0.0.0". BOOTP is disabled if a valid IP address has been set. Refer to System Configuration Menu on page 33.

Telnet Connection - Prior to accessing the Agent Module via an in-band

Telnet connection, you must configure it with a valid IP address, subnet mask, and default gateway using an out-of-band connection or the BOOTP protocol. After configuring the hub’s IP parameters, you can access the on-board configuration program from anywhere within the attached network

In-BandNetworkConnection - Theon-boardconfigurationprogramcan be accessed using Telnet from any computer attached to the network. The hub and stack can also be managed by any computer using a web browser (Internet Explorer 3.0 or above, or Netscape Navigator 3.0 or above), or from a network computer using third-party network management software.

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You can also make a remote network connection (via modems) to the serial port on the Agent Module using SLIP protocol over TCP/IP. Using this kind of connection, the system functions similar to a router, allowing you to manage the hub or other attached devices using Telnet, a web browser, or network management software.

Prior to accessing the hub via a SLIP connection, first configure it with avalid SLIP IP address, subnet mask, and default gateway.

The on-board program only p ro vides access to basic configuration functions. To access the full range of SNMP management functions, you must use SNMPbased network management software.

Agent Module

Table 2-2 provides information for the Agent Module ELH100-12/24TX.

Table 2-2. Agent Module

Part Number Functions Description

ELH100-SNMP RMON/SNMP/

Web Management

Agent Module used to manage the hub (or attached stack). Includes RS-232 serial port for console connection. One backup agent module can be installed in the stack.

available for the

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Powering the Hub

To supply power to the hub, connect the power cord to the hub and to a groundedthree-prongwall outlet(Figure 2-5).SeeAppendixA "Technical Specifications" on page 91 for more information regarding specific international power cord requirements.

Figure 2-5. Connecting the Power Cord

The PWR LED lightsgreen (see Figure 1-1). If it does not, checkto make sure that the power cable is plugged in correctly and that the power source is good.

When power is applied, the hub conducts a series of hardware and software tests to verify operation. If a terminal or computer is connected to the console port, the results of the tests are displayed on the screen. If you want to display the results of the tests after the hub has been turned on, turn the power to the hub off then back on.

The hub performs two basic types of tests at power-up. During this time, all the LEDs light in sequence. These tests are:

• Serial port

The serial console port test is the first test. If the hub fails, no further tests are performed and the console displays no information.

• Memory

Memory tests on the CPU RAM are performed after the serial port test. No results are displayed on the console.

After these tests are performed, the operational software of the hub is loaded. A series of more extensive diagnostic tests are then conducted. The results of the tests are displayedon the terminal.If all testspass, the LEDsreturn tonormal operation.Whenall testsare complete, thesystem is functional and the user interface is ready to receive commands at the console.

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Network Cable Requirements

Copper

Table 2-3 specifiesthe cable types and length constraints for the various copper interfaces on the ELH100-12/24TX.

Table 2-3. 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 2-4 specifies the fiber types, bandwidth requirements, and length constraints for the Fast Ethernet fiber interface on the fiber optic switch/ media modules.

Table 2-4. Fast Ethernet Fiber Specifications

100m (328 ft.)

Interface Type Fiber Type Fiber Diameter

100Base-FX(SC connectors)

multi-mode 62.5 2,000m (6,560 ft.)

(microns)

Maximum Length (m)

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10Base-T/100Base-TX Ports

The 10Base-T/100Base-TX ports use RJ-45 connectors. Figure 2-6 shows an RJ-45 connector being inserted into a port.

Figure 2-6. Inserting an RJ-45 Connector into a Port

The ports on the base unit are wired with the MDI-X function implemented. These ports interface to UTP cabling for

connection to 10Base-T or 100Base-TX network segments or end-stations. connections meet the requirements of ISO 8877, specified by 10Base-T, Section 14 of the IEEE 802.3 specification. Workstations or servers can beconnectedto these portsusingstandardstraight-throughwiredcables.

For connections to other hubs or switches, Port 12 (24) on the ELH10012TX (ELH100-24TX) hub includes a switch for MDI or MDI-X selection. If an MDI port is not available on the hub, a crossover necessary (refer to

MDI/MDI-X Crossover Cable Wiring on page 94). See

cable may be

Table A-2, “10Base-T/100Base-TX Pinouts,” on page 93 for 10Base-T/ 100Base-TX connector pin assignments.

The 10Base-T/100Base-TX switch/media module includes one port wired for MDI-X and one port wired for MDI. You can not use both ports on the module at the same time.

Table 2-5 provides information for the single port 10Base-T/ uplink moduleavailable for the ELH100-12/24TX.

Table 2-5. 10Base-T/100Base-TX Uplink Module

Part Number Functions Description

ELH-ULSW-TX 10Base-T/

100Base-TX

Single port RJ-45 uplink module using MDI-X and MDI connectors, with internal switching between the 10 and 100 Mbps repeater buses.

These UTP

100Base-TX

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100Base-FX Fiber Ports

The 100Base-FX Fiber port uses SC connectors. Figure 2-7 shows an

fiber connector being inserted into a fiber port on the ELH100-12/24TX.

Figure 2-7. Inserting an SC Fiber Connector into a Fiber Port

The fiber uplink modules employed (Table 2-6) support multi-mode 62.5/ 125mm fiber. The 100Base-FX ports use SC fiber connectors. The fiber connectors are configured as a receive (RX) / transmit (TX) pair.

Table 2-6. Fiber Uplink Module

Part Number Functions Description

ELH-ULSW-F2 100Base-FX-MM 2-port multi-mode (MM) fiber uplink moduleus-

ingSCfiber connectors, withinternalswitching between the 10 and 100 Mbps repeater buses.

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3. ELH100-12/24TX USER INTERFACE

Overview

Access is gained to the console menus by connecting a terminal to the console port (with a direct cable connection or over modems), or using Telnet to access the Agent Module over the network. These menus allow you to reconfigure the hub, as well as to monitor the status and performance of the hub or the attached stack. The menus have a layout similar to the sample Main Menu shown in Figure 3-1. The information is divided into the following parts:

• Menu Name (includes access privileges)

• Selectable Items

• Screen Prompt for menu selections and entry of field parameters,

and Message Area for display of parameters or error messages.

Figure 3-1. Sample Main Menu

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User Access

Once a direct connection to the serial port or a Telnet connection is established, the login screen for the on-board configuration program appears

The default user names are “admin” and “guest,” with corresponding defaultpasswords“admin”and“guest.”TheadministratorhasRead/Write access, which allows you to read and modify hub information. The guest has Read Only access to the management program, which allows you to view hub information, but not modify any operating parameters.

You should define a new administrator password,record it and put it in a safeplace. Fromthe MainMenu, selectUserPasswords and enter a new password for the administrator. Passwords can consist of up to 14 alphanumeric characters and are not case sensitive.

To use the console menus, do the following:

1. Use the cursor keys to highlight the desired option.

If the selected item is a submenu title, the submenu is displayed when you press the Enter key.

2. Follow the screen prompts to specify the parameter requested.

If the selected item is a parameter, the system displays a prompt for the entry of a new parameter value. If the value entered is invalid, a message displays, requesting you to enter a valid value.

. You may need to press Enter a few times to display the screen.

A user isallowed three attempts to enter the correct password; on the third failed attempt the current connection is terminated.

Factory Defaults

Table 3-1 lists the default settings for the hub configuration parameters. Each parameter can be changed via the console menus or Telnet.

Table 3-1. Factory Default Settings

Parameter Default Value

BootP Enable Yes Port Enable Yes Screen Timeout 10 Send Modem Initialization String (ATQ0V0S0=1) Yes SNMP Public Community Name public Terminal Baud Rate 9600 Terminal Hardware Flow Control No

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Menu Hierarchy

Figure 3-2 shows the ELH100-12/24TX user interface menu hierarchy.

Figure 3-2. ELH100-12/24TX User Interface Menu Hierarchy

9033060 ELH100-12/24TX User Interface 29

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Main Menu

The Main Menuis the first screen seen after successfully logging in to the system. Figure 3-3 shows the Main Menu and the accompanying table describes the Main Menu

System Information ... Exit ... Restart Hub ...

System Configuration ... TFTP Download ... SNMP Configuration ... XMODEM Download ... Hub Configuration ... User Password ... Port Configuration ... Console Configuration ...

Hub Statistics ... Port Statistics ...

Display or work with system information

Use <TAB> or cursor keys to move, <ENTER> to select

Selection Description

System Information Provides system description, including system name and other

Restart Hub Performsa software reset ofthe managementagentfor all hubs

Exit Logs out of the console interface. Once you log out , you must

System Configuration Configures IP parameters, including address, subnet mask,

SNMP Configuration Conf igures communities and trap destinations. Hub Configuration Displays hardware/firmware versions f or hub, isolates/attaches

Port Configuration Disables/enables any port;andsets communication mode to10

TFTP Download Downloads new firmware version to update the Agent Module

data.

in stack or for a selected hub by restarting the system software and reloading certain operating parameters.

enter a user name and password before you can access the console interface again.

gateway, SLIP IP, default bootup IP. Specifies maximum number of Telnet sessions. Specifies the SNMP agent’s segment.

hub’s repeater segments, and shows if an Agent Module or switch/media module is installed. If an Agent Module is installed, shows its bootup option, MAC address, hardware/ firmware versions, and the Baud rate of the serial port.

or 100 Mbps, or auto-sensing.

over the network.

Figure 3-3. Main Menu

Main Menu

=========

Configuration Screens

=====================

Statistics Screens

==================

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XMODEM Download Downloads new firmware to update the Agent Module via a

console interface.

User Password Sets Administrator and Guest names and passwords used for

system access.

Console Configuration

Sets console time-out and refresh period for displayed statistics. Hub Statistics Displays network performance for each hub in the stack. Port Statistics Displays network performance for the selected port.

System Information Menu

Use the System Information menu to display descriptive information aboutthehub, or forquicksystemidentification.Figure 3-4shows and the accompanyingtable describes the System Information menu

Figure 3-4. System Information Menu

SystemInformation

==================

System Desc.: Cabletron ELH100 Dual Speed Hub

Sys. Obj. ID: 1.3.6.1.4.1.52.3.9.1.10.5

Sys. Up Time: 6213437 (0 day 17 hr 15 min 34 sec)

System Name:

Contact: Cabletron Inc., 0021-516-435-6475

Location:

Type the system name character string

Use <TAB> or cursor keys to move, <ENTER> to select,

<Ctrl-F> to move forward a character, <Ctrl-B> to move back a character

Selection Description System Description System hardware description. System Object ID Object identifier for the hub’s network management subsystem

as defined in MIB I I. Sys. Up Time Time since the hub was powered on. System Name* Name assigned to the hub system. Contact* Contact person for the system. Location* Specifies the area or location where the system resides.

* Maximum string len gth is 255, but the screen only displays 44 characters. You can use the arrow keys to browse the whole string.

9033060 ELH100-12/24TX User Interface 31

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Reset

Exit

Use the Restart Hub command under the Main Menu to reset the management agent. The reset screen includes an option to return all configuration parameters to their factory defaults.

The hub takes approximatelytwo minutes to restart. There is no apparent activity during this time. You should wait until the restart has completed.

Use the Exit command under the Main Menu to log out of the user interface and terminate communications with the hub for the current session. After this command is entered, system logout occurs automatically.

32 ELH100-12/24TX User Interface ELH100-12/24TX

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System Configuration Menu

Use the System Configuration menu to configure the Agent Module’s Internet Protocol (IP) parameters, define the maximumnumber of Telnet sessions allowed, and specify to which segment (10 Mbps or 100 Mbps) the management agent is attached. Figure 3-5 shows and the accompanyingtable describes the System Configuration Menu.

Figure 3-5. System Configuration Menu

System Configuration

===================

Parameter Current Setting New Setting

------------ ----------- -----------

IP Address: 210.68.150.225 210.68.150.225 IP Subnet Mask: 255.255.255.0 255.255.255.0 IP Gateway: 0.0.0.0 0.0.0.0

SLIP IP: 0.0.0.0 0.0.0.0 SLIP Subnet Mask: 0.0.0.0 0.0.0.0 SLIP Gateway: 0.0.0.0 0.0.0.0

----------------------------------------

Maximum number of allowed Telnet sessions (0 - 2) : 2

Agent Ethernet Port Attached to: 100 Mb/s

Type the new IP address

Use <TAB> or cursor keys to move, <SPACE>to toggle, <ENTER> to select, <Ctrl-F> to move forward a character, <Ctrl-B> to move back a character

Selection Description

IP Address IP address of the agent y ou are managing. Valid IP

addresses consist of fournumbers (0 to 255)separated by periods. Anything outside of this format will not be accepted by the configuration program. If the IP address is set to 0.0.0 .0 (the default), the SNMP agent will automatically issue BOOTP requests to a BOOTP server to learn its IP address. BOOTP requests will be disabled by configuring the agent with a valid IP address.

Subnet Mask Subnet mask of the management agent you have

selected. This mask identifies the host address bits usedfor routing to specific subnets.(Thedefaultsubnet mask is 0.0.0.0.)

Default Gateway Gateway used to pass trap messages from the

management agent to the network management station. Note that t he gateway must be defined if the management station is located in a different IP segment. (The default gateway is 0.0.0.0.)

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SLIP IP IPaddress of the Agent Module used when accessing

the configuration program via an out-of-band SLIP

connection to the serial port.

The hub does not allow the SLIP IP address to be the

same as the IP address.

SLIP Subnet Mask Subnetmask for the SLI P IPaddressused by the Agent

Module.

SLIP Gateway SLIP gateway IP address used to pass tr affic to the

network management station. Note that the gateway

must be def ined if the management station islocated in

a different IP segment.

Max # of allowed Telnet sessions

The maximum number of Telnet sessions allowed to

simultaneously access the Agent Module.

Note: The maximum num ber of management sessions

(not necessarily Telnet sessions) is 2.

Agent Ethernet Port Attached to

The network segment (10 Mb/s or 100 Mb/s) to which

the Agent Module is attac hed.

34 ELH100-12/24TX User Interface ELH100-12/24TX

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SNMP Configuration Menu

Use the SNMP Configuration Menu to display and modify parametersfor the Simple Network Management Protocol (SNMP). The Agent Module monitors the hardware status of the hub (or connected stack), as well as the traffic passing through the ports. A Network Management Station (NMS)canaccessthisinformationusingthird-partynetworkmanagement software. Access rights to the management agent are controlled by community strings. To communicate with the management agent, the NMS must first submit a valid community string for authentication.The options for configuring community strings and related trap functions are described in Figure 3-6, Figure 3-7, and Figure 3-8 and their accompanyingtables

Figure 3-6. SNMP Configuration Menu

SNMP Configuration

==================

Transmit Authentication Failure Traps: YES

SNMP Communities ...

SNMP Trap Destinations ...

Press <ENTER> to go to the SNMP Communities Screen

Use <TAB> or cursor keys to move, <SPACE> to toggle, <ENTER> to select

Selection Description

Transmit AuthenticationFailure Traps

SNMP Communities Assigns SNMP access based on specified community

SNMP Trap Destinations

9033060 ELH100-12/24TX User Interface 35

Issue a trap message whenever authentication of an SNMP request fails. The default i s to issue traps to specified IP trap managers.

strings. Specifies management stations that will receive

authentication failure messages or other trap messages from the hub.

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SNMP Communities

Figure 3-7. SNMP Communities

SNMP Communities

================

Community Name Access Status

------------ --------- -------

1. public READ/WRITE Enabled

Type a community name, 20 characters or less

Use <TAB> or cursor keys to move, <SPACE> to toggle, <ENTER> to select,

<Ctrl-F> to move forward a character, <Ctrl-B> to move back a character

Selection Description

Community Name The community name for read only SNMP access to

Access Management access is Read Only or Read/Write. Status Indicates operational status of the communit y as

the device (1-10 character range; the def ault name is:

“public”).

Enabled or Disabled.

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SNMP Trap Destinations

Figure 3-8. SNMP Trap Destinations

SNMP Trap Destinations

======================

IP Address Community Name Status

-------- ----------- -----

10.

Type an IP address for a trap destination

Use <TAB> or cursor keys to move, <SPACE> to toggle, <ENTER> to select,

<Ctrl-F> to move forward a character, <Ctrl-B> to move back a character

Selection Description

IP Address The IP address of the trap destination where SNMP

Community Name The SNMP community name to use for traps forwarded

Status Indicates status of entry as Enabled or Disabled.

trap messages are forwarded.

to the trap destination.

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Hub Configuration Menus

Use the Hub Configuration menu to configure any hub in the stack. This menuis used toconfigure theselected hub,as well as the AgentModule. Use the following menu to view a basic description of all the hubs in the stack, including hardware and firmware version numbers, or to open a more detailed configuration screen for a specific hub. The information providedby thesescreensisdescribedin Figure 3-9 andFigure 3-10,and the accompanying tables.

Figure 3-9. Hub Selection Menu

Hub Configuration: Hub Selection Menu

=====================================

Hub Hardware POST SYSTEM Num SNMP Switch/Media Detailed ID ID F/W Ver F/W Ver Ports Agent Module Screen

-- ------- ------ ------ ---- ---- --------- --------------

1 110000001CC8 1.00 1.00 12 Active ELH-ULSW-TX <DISPLAY DETAILS>

<PREV_SCREEN>

Press <ENTER> to go to a more detailed screen for this hub

Use <TAB> or cursor keys to move, <ENTER> to select

Selection Description

Hub ID Hub ident ifier in stack. (Up to 6 hubs may be connected via

Hardware ID Hardware version number of the repeater board. Post Firmware Version Ve rsion n umber of the repeater firmware in permanent

System Firmware Version Version number of the repeater firmware in temporary

Number of Ports Indicates whether this device has 12 or 24 repeater ports. SNMP Agent Indicates whether an Agent Module is installed in this hub. Switch/Media Module Indicates which switch/media module is installed in this hub. Detailed Screen Highlight “Display Details” and p ress <Enter> to access the

38 ELH100-12/24TX User Interface ELH100-12/24TX

the stack cable.)

memory.

configuration parameters for the hub.

Page 57

Figure 3-10. Hub Configuration Menu

Hub Configuration

Hub ID: 1 Model: ELH100-12TX Hardware ID: 11-00-00-00-1C-C8 Number of Ports: 12 10M backplane: Isolated 100M backplane: Isolated

Status: Active H/W Ver: 0 POST Ver: 1.00 MAC Address: 00-00-1D-3F-2A-E1 System Ver: 1.00 Serial Port Baud Rate: 9600 Send Initialization String: NO Serial Port Initialization String:ATQ0V0S0=1

Status: Not present

Use <TAB> or cursor keys to move, <SPACE> to toggle, <ENTER> to select,

<Ctrl-F> to move forward a character, <Ctrl-B> to move back a character

Selection Description

Hub Configuration

Hub ID Hub identifier in stack. Hardware ID Serial number of this hub. 10M Backplane Attaches/isolates hub’s 10 Mbps repeater bus from the

Model Themodel number of this hub. # of Ports Indicates whether this device has 12 or 24 repeater ports. 100M Backplane Attaches/isolates hub’s 100 Mbps repeater bus from the

SNMP Agent

Status Indicates if an Agent Module is installed and active. POST Version Version number of the Agent Module’s Power-on Self-test. System Version System firmw are version. Serial Port Baud Rate Rate at which data is sent between the Agent Module’s

Serial Port Initialization String

H/W Version Hardware version number of the Agent Module. MAC Address Physical address of the Agent Module.

=================

SNMP Agent

==========

Switch/Media Module

===================

Isolate or attach the 10 Mb/s segment

stack’s data channel.

serial port and the connected device. The suppor ted baud rate is 9600 bps.

The modem initialization string sent from the serial port to the attached device.

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Serial Initialization String

Yes, to send the i nitialization string to an attached modem. No, if there i s a direct connection from the serial port to a PC.

Switch Module

Status Indicates if a switch/media module is installed.

40 ELH100-12/24TX User Interface ELH100-12/24TX

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Port Configuration Menu

Select Administrative Status Control from the Port Configuration screen, then select the port group to configure, either “1 thru 12,” “13 thru 24,” or “Switch/Media Module” (if installed). The following screens show the configuration options.

Port Administrative Status Control Menu

Figure 3-11. Port Administrative Status Control Menu

Port Administrative Status Control (1 - 12)

===========================================

Hub ID: 1 Model: ELH100-12TX

Port Admin State Link State Auto Partitioned Mode Speed (Mb/s)

--- -------- ------- ----------- ---- -----------

1 Enabled No Link No Auto 2 Enabled No Link No Auto 3 Enabled No Link No Auto 4 Enabled No Link No Auto 5 Enabled No Link No Auto 6 Enabled No Link No Auto 7 Enabled No Link No Auto 8 Enabled No Link No Auto 9 Enabled No Link No Auto 10 Enabled NoLink No Auto 11 Enabled NoLink No Auto 12 Enabled Link No Auto 100

Use <TAB> or cursor keys to move, <SPACE> to toggle, <ENTER> to select

Use the space bar to toggle states

Selection Description

Admin State Allows you to disable a port due to abnormal behavior such

as excessive collisions, and re-enable it after the problem has been resolved. You may also disable a port for security reasons.

Link State Indicates if the por t has a valid connection to an external

device. Auto Partitioned I ndicates if the port is partitioned. Mode Sets the transmission speed to 10 Mbps, 100 Mbps or auto-

detection. Speed Indicates the transmission speed currently used by this port.

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Module Port Configuration Menu

The switch/media m odule configuration menu is accessible only if a module is installed in the hub’s upper slot. The switch/media modules have two internal ports that are connected to the hub’s internal repeater segments. The configuration screen and options are displayed below.

Figure 3-12. Switch/Media Module Port Administrative Status Control Menu

Port Administrative Status Switch/Media Module

==============================================

Hub ID: 1

Model: ELH100-12TX

Module Type:TX 10/100 Switch/Media Module

Port Admin State Link State Duplex Speed (Mb/s)

--- -------- ------- ----- ---------

1 Int: Enabled Link Half 100 2 Ext: Enabled Link Half 10 3 Ext: Enabled Link Full 100

Use the space bar to toggle between enabled and disabled states

Use <TAB> or cursor keys to move, <SPACE> to toggle, <ENTER> to select

Selection Description

Module Type The type of module installed in the hub. Port Port identifier for the module. Ports 1 and 2 link internally to

the hubs 100 Mbps and 10 Mbps repeater segments. Port 3 is the external port on the module’s front panel.

Admin State The module’s internal ports can be disabled to isolate the

module from the hub. You may wish to do t his if the module’s external connection is exhibiting abnormal

behavior or for security reasons. Link State Indicates if the port has a valid connection. Duplex The communication mode currently used by the port, either

half duplex or full duplex. Speed Indicates t he transmission speed currently us ed by the port.

42 ELH100-12/24TX User Interface ELH100-12/24TX

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Backup Port Control Menu

Select Backup Port Control from the Port Configuration screen to define up to 15 master/slaveport pairs. If the connection to the masterport fails, the slave port will automatically take over. For greater reliability, primary and secondary ports should be located on different hubs. The following screen and table show how to specify and activate port backup pairs.

Figure 3-13. Backup Port Control Menu

Index Primary Port Secondary Port Status Active Port

---- --------- ----------- ----- --------

1 Hub: -- Port: -- Hub: -- Port: -- -------- --------2 Hub: -- Port: -- Hub: -- Port: -- -------- --------3 Hub: -- Port: -- Hub: -- Port: -- -------- --------4 Hub: -- Port: -- Hub: -- Port: -- -------- --------5 Hub: -- Port: -- Hub: -- Port: -- -------- --------6 Hub: -- Port: -- Hub: -- Port: -- -------- --------7 Hub: -- Port: -- Hub: -- Port: -- -------- --------8 Hub: -- Port: -- Hub: -- Port: -- -------- ---------

9 Hub: -- Port: -- Hub: -- Port: -- -------- --------10 Hub: -- Port: -- Hub: -- Port: -- -------- --------11 Hub: -- Port: -- Hub: -- Port: -- -------- --------12 Hub: -- Port: -- Hub: -- Port: -- -------- --------13 Hub: -- Port: -- Hub: -- Port: -- -------- --------14 Hub: -- Port: -- Hub: -- Port: -- -------- --------15 Hub: -- Port: -- Hub: -- Port: -- -------- ---------

Use <TAB> or cursor keys to move, <SPACE> to toggle, <ENTER> to select

Backup Port Control

Type the hub ID for the primary port

Field Description

Index Identifier for up to 15 backup port pairs. Primary Port Pair member serving as the primary link.

Hub Hub ID for the master port. Port Port identifier for the master port.

Secondary Port Pair member serving as the backup link.

Hub Hub ID for the slave port.

Port Port identifier for the slave port. Status Each backup pair can be set to Active or Inactive. Active Port Indicates if the primary or secondary port is handling the link.

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TFTP Download Menu

Use the TFTP Download menu to load software updates into the hub over the network. The download file should be anELH100-12/24TX binary file from Cabletron; otherwise, the agent module will not accept it. The success of the download operation depends on the accessibility of the TFTP server and the quality ofthe network connection. Afterdownloading new software, the agent module will automatically restart itself. Parametersshown on this screen are indicated inthe followingfigure and table.

Figure 3-14. TFTP Download Menu

Download Server IP: 10.1.4.45

Download Mode: Upgrade DRAM and reboot

Filename: cbt0209b.bin

Enter the server's IP address

TFTP Download

=============

Use <TAB> or cursor keys to move, <SPACE> to toggle, <ENTER> to select

Selection Description

Download Server IP IP address of a TFTP server. Download Mode You can download to permanent flash ROM or temporary

Filename The ELH100-12/24TX binary file to download. Start TFTP Download Issues request to TFTP server to download the specified file.

44 ELH100-12/24TX User Interface ELH100-12/24TX

storage in RAM (for test purposes). However, if you download to temporary memory, this firmware will be lost upon power off.

After the TFTP download is completed, the hub takes approximately two minutes to restart. There is no apparent activity during this time. You should wait until the restart has co mpleted .

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XMODEM Download Menu

Usethe Xmodem Downloadcommandtoupdateavailablesoftware inthe hub via an out-of-bandconnection to the serial port on the Agent Module. The download file should be an ELH100-12/24TX binary file from Cabletron; otherwise, the agent module will not accept it. This command specifiesdirect downloadfrom an attached device via theserial port.You may download using any terminal emulation program that can transmit binary files using the XModem protocol. The parameters shown in this screen are indicated in the following figure and table.

Figure 3-15. XMODEM Download Menu

XMODEM Download

===============

Download Mode: Upgrade DRAM and reboot

Use the space key to select DRAM or FLASH download

Use <TAB> or cursor keys to move, <SPACE> to toggle, <ENTER> to select

Selection Description

Download Mode You can download to permanent flash ROM or temporary

Start Xmodem Download

storage in RAM (for test purposes). However, if you download to temporary memory, this firmware will be lost upon power off.

Waits to receive a file sent from the attached PC running the terminal emulation program.

To start the download process, use the XModem protocol and select the ELH100-12/24TXbinary file.Start sendingthe file from your computerby usingthe “send”or “upload”file facilityof the terminal emulationprogram. Theterminal emulationprogram will displaythe progressof thedownload process.Afterdownloading the newsoftware, the agentwill automatically restart itself.

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User Password Menu

The User Password menu is used to display or modify user names and passwords for the on-board configuration program. There are two user types, Administratorand Guest. Only the Administrator has write access for parameters governing the SNMP agent. You should therefore assign a user name and password to the Administrator as soon as possible,and storeitinasafeplace.

Passwords can consist of up to 14 alphanumeric characters and are not casesensitive.The configurationprogram willallow auserthree attempts at entering a password before locking the user out by terminating the current connection. If for some reason your password is lost, or you can not gain access to the system configuration program, contact your Cabletron distributor for a ssistance.

Figure 3-16. User Password Menu

Display/Change User Names and Passwords

=======================================

User Type User Name Password Password Verify

------- -------- -------- -----------

Administrator: admin ************** **************

Guest: guest ************** **************

Enter a user name, 1 to 14 characters

Use <TAB> or cursor keys to move, <ENTER> to select,

<Ctrl-F> to move forward a character, <Ctrl-B> to move back a character

Selection Default Descri ptio n

Administrator name: admin

password: admin

Guest name: guest

password: guest

46 ELH100-12/24TX User Interface ELH100-12/24TX

Administrator has access privilege of Read/Write for all screens.

Guest has access privilege of Read O nly fo r all screens.

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Console Configuration Menu

The Console Configurationmenu is used to configure the console connectedto thehub’s serial port. The consoleparameters are described in the following figure and table.

Figure 3-17. Console Configuration Menu

Console Configuration

=====================

Automatic Logout Status: ON

Automatic Logout Delay Time: 10 Minutes

Auto-Refresh Period: 30 Seconds

Use the space bar to toggle automatic logout

Use <TAB> or cursor keys to move, <SPACE> to toggle, <ENTER> to select

Selection Description

Automatic Logout Status

Automatic Logout Delay Time

Auto-Refresh Period Specifies the interval at which statistics are read from the

9033060 ELH100-12/24TX User Interface 47

Enables/disables the logout function.

If no input is received from the attached device after this interval (in minutes), the current session is closed.

Range: 0 - 99 m in utes. Default is 10 minutes.

hub. Options: 30, 60, 120, 180, 300 seconds. Default is 30

seconds.

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Hub Statistics Menu

The Hub Statistics screens display statistics for the 10 and 100 Mbps stack segments. These values can be used to indicate the approximate loading for each segment. You can use the Hub Statistics Overview screen to display key statisticsfor all hubs in a stack or detailed statistics for each individual hub. The Hub Statistics screens are shown in Figure 3-18 and Figure 3-19, and described in the accompanying tables.

Figure 3-18. Hub Statistics Overview Screen

Hub Statistics Overview =======================

10Mb/s Segments Hub Frames Bytes Collisions CRC Errors Tot.Errors Reset Details

--- -------- ------- ------- ------- ------- ------- ------

1 892 121329 0 0 0 <RESET1> <DETAIL>

100Mb/sSegments

Hub Frames Bytes Collisions CRCErrors Tot.Errors

--- ------- -------- ------ -------- -------

1 736685 112506135 425 6 620

<REFRESH STATISTICS> <AUTO-REFRESH STATISTICS> <PREVIOUS SCREEN> Press <ENTER> to reset both 10 and 100 Mbit statistics counters for this hub Use <TAB> or cursor keys to move, <ENTER> to select

Field Descripti o n

Hub Hub identifier within the stack. Frames Number of frames passing through this hub. Bytes Number of bytes passing through this hub. Collisions Number of simultaneous node transmissions detected by this hub. CRC Errors Number of Ethernet Cyclic Redundancy Check errors detected by

this hub.

Total Errors Total number of errors, including FCS, alignment, Frames Too

Long, Short Events, Late Events, Jabber, and Data Rate

Mismatches detected on this device. Reset Resets the statistics counters for the hub. Details Highlight “Detail” and press<Enter> to display thedetailed statistics

screen for the hub. Refresh Statistics Refresh the displayed statistics. Auto-Refresh

Refresh statistics at the interval specified in Console Configuration. Statistics

48 ELH100-12/24TX User Interface ELH100-12/24TX

Page 67

Figure 3-19. Detailed Hub Statistics Screen

Hub 1 Statistics

Statistic 10 Mb/s Segment 100 Mb/s Segment

------------- -------------- --------------

Readable Frames 433 763985 Readable Octets 86057 116973315 CRC Errors 0 6 Alignment Errors 0 1 Frames Too Long 0 0 Short Events 0 612 Runts 0 3 Collisions 2 425 Late Events 0 1 Data Rate Mismatch 0 0 Auto Partitions 0 1 Total Errors 0 620

Press <ENTER> to refresh this hub's statistics screen

Use <TAB> or cursor keys to move, <ENTER> to select

Field Descripti o n

Readable Frames Number of good frames passing through the hub. Readable Octets Number of good octets passing through the hub. CRC Errors Number of CRC errors detected by the hub. Alignment Errors The number of mis-sy nchronized data packets detected by the hub. Frames Too Long Number of times frame length has exceeded the maximum

allowable size (that is, 1518 byt es). Short Events Number of short fragments. Runts Number of fragments (that were too long to qualify as short events). Collisions Number of simultaneous node transmissions detected by the hub. Late Events Data Rate

Mismatch

Number of frames where a collision occurred late in the transmission.

Number of f rames for which the data rate does not match the local

frequency. Auto Partitions Number of times the hub has automatically partitioned ports due to

jabber. Total Errors Total number of errors, including FCS, Alignment, Frames Too

Long, Short Events, Late Events, Jabber, and Data Rate

Mismatches detected on the hub. Refresh Statistics Refreshes the displayed statistics. Auto-Refresh

Statistics Reset Hub

Refreshes statistics at the interval specified in Console

Configuration.

Resets the statistics counter for all items to zero. Statistics

=================

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Port Statistics Menu

Use the Port Statistics screen to display key statistics for each port. Overall statistics on the traffic passing through each port are displayed. This information can be used to identify potential problems with the hub (such as a faulty port).

Selectthe requiredportfrom thePort Statistics: PortSelectionMenu. The PortStatisticsScreenisshowninFigure3-20anddescribedinthe accompanyingtable

Readable Frames: 805490 Collisions: 425 Readable Octets: 123515227 Late Events: 1 CRC Errors: 6 Data Rate Mismatches: 0 AlignmentErrors: 1 Auto Partitions: 1 Frames Too Long: 0 Total Errors: 620 Short Events: 612 LSA Changes: 672366 Runts: 3 Last Source Address:00-00-E8-42-72-E4

Figure 3-20. Port Statistics Screen

Hub 1 Port 12 Statistics

========================

Press <ENTER> to refresh this port's statistics screen

Use <TAB> or cursor keys to move, <ENTER> to select

Field Descripti o n

Readable Frames Number of good frames received by the port. Readable Octets Number of good octets received by the port. CRC Errors Number of CRC errors. Alignment Errors For 1 0 Mbps por ts, the counter records alignment errors (mis-

synchronized data packets). For 100 Mbps ports, the counter records the sum of alignment errors and code errors (frames received with rxerror signal).

Frames Too Long Number of times frame length has exceeded the maximum

allowable size (that is, 1518 byt es). Short Events Number of short fragments. Runts Number of fragments (that were too long to qualify as short events). Collisions Late Events Data Rate

Mismatches

50 ELH100-12/24TX User Interface ELH100-12/24TX

Number of simultaneous node transmissions detected by this device.

Number of frames where a collision occurred late in the transmission.

Number of f rames for which the data rate does not match the local

frequency.

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Auto Partitions Number of times this port has been automatically partitioned due to

jabber.

Total Errors Total number of errors, including FCS, Alignment, Frames Too

Long, Short Events, Late Events, Jabber, and Data Rate

Mismatches detected on this device. LSA Changes Number of times the source address has changed. Last Source Addr. Last source address. Refresh Statistics Refreshes the displayed statistics. Auto-Refresh

Statistics

Refreshes statistics at the interval specified in Console

Configuration. Reset Counters Resets the statistics counter for all items to zero.

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Page 71

4. CONFIGURING & MONITORING T HE HUB

Common Tasks

The hub console menus allow you to modify default hub settings and configure the hub for network management.They also allow you to monitor hub performance and status. See Chapter 3, ELH100-12/24TX User Interface on page 27, for an overview of the menu hierarchy and a description of all menus. The following sections describe common tasks in setting up and operating the ELH100-12/24TX hub using the console menus.

To begin, set operating parameters and make sure the network connections are correct by performing these tasks:

• Setting password protection for the hub to prevent unauthorized

access to console menus

• Assigning an IP address for the hub if you plan to manage the hub

using SNMP, or if you use Telnet to access the hub

• Checking network configuration status and verifying that network

connections are correct

After the hub is installed and operating, you may want to perform any of the following tasks:

• Connecting via Telnet for in-band access to the console menus

• Setting SNMP parameters for management access

• Viewing hub statistics to monitorand evaluate hub performance and

traffic patterns on the network

• Downloading a software upgrade

• Configuring port operation (enable/disable or set port speed)

• Setting a default gateway

• Configuring BootP

Setting Password Protection

The ELH100-12/24TXhub is factory-configured with access rights to the console menus set to READ/WRITE for the administrator, and READONLY for all others. These settings allow anyone who knows the hub’s defaultuser nameand passwordto usethe console menus to modify any operational parameter. To protect the configuration of the hub from unauthorized modification, you can change the password to the console menus.

9033060 Configuring & Monitoring the Hub 53

Page 72

To enter a password, do the following:

1. Select Password from the System Configuration Menu and press [Enter].

2. Enter a password containing 1 to 14 alphanumeric characters.

The password is not case sensitive. For verification, you are asked to enter your password again. If both entries agree, the new password is stored.

If you forget your password, contact your Cabletron System Support Representative.

You are automatically logged out from the console menus due to inactivity based on the Automatic Logout Delay Time setting in the Console Configuration Menu.

Assigning an IP Address

To assign an IP address to the hub, do the following:

1. Select System Configuration Menu from the Main menu.

2. Select New Setting for IP address from the menu and enter the IP

address. Select <APPLY>.

The IP address is now programmed. If necessary, select Subnet Mask from the menu and enter the appropriate mask.

Checking Network Configuration Status

To check connection status for the network, do the following:

1. Select Port Configuration Menu from the Main Menu. If a network cable is properly connected to a port, the Link Status for

theportreads LINK. Ifno cable is connectedtothe port, orifthe cable or port is faulty, the Link Status for the port reads NO LINK.

2. If you see NO LINK status for a connected port, plug the cable into another port on the hub or try another cable.

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Connecting via Telnet

You can connect to the ELH100-12/24TX hub from a remote location using the Telnet application. This application allows you to establish inband access to the console menus.

To connect to the ELH100-12/24TX hub via Telnet, do the following:

1. Assign an IP address using the System Configuration Menu.

2. Login tothe ELH100-12/24TX hub viaTelnet using theconfiguredIP

address.

Setting SNMP Management Access

Access to the ELH100-12/24TX hub through SNMP is controlled by community names. The community names set for the hub must match those used by the SNMP management station for successful communicationtooccur.Youcanassignuptofivecommunitynamesto the hub using READ/WRITE or READ ONLY access. The default community name is “public,” and provides read/write access to the hub.

The ELH100-12/24TX hub can send SNMP messages, called traps, to SNMP management stations when an important event occurs with the hub. The hub allows up to 10 destinationsto be configured for these trap messages to be sent.

To configure SNMP access for the hub, do the following:

1. Select SNMP Configuration Menu from the Main Menu.

2. Select SNMP Communities from the SNMP Configuration Menu.

3. Specify a Community Name (you are permitted to enter from one to

10 characters), select the desired read/write access community name, and set Status to Enabled.

4. Selectone or more Trap Destinationentriesfrom themenu, enter the

appropriate IP addresses, and set Status to Enabled.

6. Foreach trapdestinationentered, a correspondingcommunity name

should be entered. (This community name must be defined in the SNMP Communities Menu.)

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Viewing Hub Statistics

To view hub statistics, do the following:

1. Select Hub Statistics from the Main Menu. The screenlists the main statisticalcounts for both segmentson the

hub simultaneously.

2. Select <DETAIL> from the Hub Statistics Overview screen. The screen lists a summary of sum total statistics for all ports on the

hub.

3. Select Port Statistics from the Main Menu.

4. Enter the Hub ID and Port ID. Select <OK>.

The screen lists expanded port-level statistics for an individual port.

5. On any of the statistics screens, select <RESET COUNTERS> to clear (zero) the displayed statistical counts and <REFRESH STATISTICS> to refresh (update) the displayed statistical counts.

Downloading a Software Upgrade

You can upgrade the operational software in the ELH100-12/24TX hub without physically opening the hub or being in the same location. The software storage sector in the flash memory of the hub is reprogrammable, allowing you to easily download software feature enhancements and problem fixes to the hub from a local or remote location.

Software can be downloaded to the hub in two ways:

• Via the serial port. This procedure is an out-of-band operation that

copiesthe software throughthe serial port to the hub.This operation takes approximately 40 minutes and requires minimal configuration.

• Via TFTP download.This procedure uses a TFTP server connected

to the network and downloads the software using the TFTP protocol. A TFTP download is much faster than a serial download, requiring onlya matterof minutes,and can be used to upgrade an ELH100-12/ 24TX hub that is not physically proximate. The disadvantage is that this method requires a TFTP server and additional setup.

Downloading Via the Serial Port

A serial downloadis the easiest methodto upgradethe ELH100-12/24TX hub software, requiringthe least amount of equipment and configuration.

To download hub software via the serial port, do the following:

1. Select XMODEM Download from the Main Menu.

2. Select “Upgrade FLASH and reboot.”

3. Select <Start XMODEM Download>.

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4. When the system prompts, confirm that you want to proceed.

The following message prompt displays:

Receiving image...

5. Send the file using the XMODEM protocol from your computer

application (the procedure varies depending upon the application used).

When the XMODEM procedure finishes,a message appearsstating that the system is initializing.The login prompt displays after the system initializes. If the loginprompt does not display, youmay need to press the Enter key several times.

Downloading Via TFTP

To perform a TFTP download, you must first configure the ELH100-12/ 24TX hub. This consists of programming the hub with an IP address, if this has not already been done, and entering the IP address of the TFTP server and the name of the upgrade file. To program the hub IP address, go to the TFTP Download Menu which is accessiblefrom the Main Menu screen.

To download hub software via TFTP, do the following:

1. Enter the Download Server IP address.

2. Set the Download Mode to “Upgrade FLASH and reboot.”

3. Enter the filename to be downloaded from the TFTP server.

Depending on the system you use as a TFTP server, you may need to include the directory name with the filename.

4. If necessary, configure the address of an IP gateway to reach the

server from the hub using the IP Gateway field on the System Configuration Menu.

5. Configure the TFTP server by copying the download file to the

appropriate directory and starting the server.

6. Select <Start TFTP Download> and press [Enter].

To verify that the TFTP download has been successfully completed, note the software version level displayed on the Hub Configuration screen accessible from the Main Menu. This number should match the version number of the downloaded file.

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Configuring Port Operation

You can configure 10/100 ports on the base unit for operational parameters such as enabled/disabled, and port speed or auto-sensing.

To configure port operation, do the following:

1. Select Port Configuration from the Main Menu.

2. Select Administrative Status Control from the Port Configuration

menu.

3. Select Port Group 1-12, 13-24 or Switch/Media Module.

4. Highlight any port, and select “Enabled” or “Disabled” in the Admin

State field to toggle between enabling and disabling the port(s).

5. Select “Force 10,” “Force 100” or “Auto” under the Mode field to set the port speed to 10 Mbps, 100 Mbps or auto-detection.

The console interface can only enable/disable the ports on switch/media modules. To configure the speed/mode, use the 100Full/Auto toggle switch on the 10Base-T/100Base-TX module or the Full/Half toggle switch on the 100Base-FX module.

Spanning Tree

The Switch/Media modules do not support Spanning Tree, which is intended to prevent network loops from forming. There is no loop detection.

The user is cautioned to understand and avoid configurations that can create a loop. However, if the ELH100-12/24TX is connected in a redundant link configuration to a single device which does support Spanning Tree, one link will be properly blocked, preventing a network loop from forming. This method can be used to provide a standby connection to the network backbone which will become active if the primarylinkislost.

Setting a Default Gateway

The Default Gateway parameter defines the IP address of a router or other network device which is on the same subnet as the hub. The gateway receives IP packets that are to be sent to another subnet.

To set a default gateway, do the following:

1. Select System Configuration Menu from the Main Menu.

3. Enter the gateway IP address under New Setting. Select <APPLY>.

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Configuring BootP

The BootP protocol allows you to automatically configure the hub’s IP address information. Enabling this feature greatly speeds up device configuration,especially when a large number of devices are installed.

A BootP server must be operating on the network and be properly configured for this option to work. When this option is enabled, the hub tries to obtain an IP address from a BootP server.

To configure BootP, do the following:

1. Select System Configuration Menu from the Main Menu.

2. Set the IP address under the New Setting field to 0.0.0.0. This

selection forces the hub to issue BootP requests when powered on.

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5. WEB-BASED MANAGEMENT

As well as the menu-driven system configuration program, the Agent Module provides an embedded HTTP Web agent. This agent can be accessedby any computeron the networkusing a standardWeb browser (Internet Explorer 3.0 or above, or Netscape Navigator 3.0 or above).

Using the Web browser management interface you can configure a hub (or stack attached via the backplane) and view statistics to monitor network activity. The Web interface also provides access to a range of SNMP management functions with its MIB and RMON browser utilities.

Prior to accessing the Agent Module from a Web browser, be sure you have first performed the following tasks:

1. Configure it with a valid IP address, subnet mask, and default

gateway using an out-of-band serial connectionor BootP protocol.

2. Set user names and passwords using an out-of-band serial

connection.Access to the Web agent is controlled by the same user names and passwords as the on-board configuration program. The default user names are “admin” and “guest” with corresponding default passwords of “admin” and “guest.”

Navigating the Web Browser Interface

Toaccess the Web-browserinterfaceyou are firstrequiredto enterauser nameandpassword. As withthe console interfaceprogram, therearetwo user types, Administrator and Guest. The Administrator has Read/Write access to all configuration parameters and statistics, while the Guest has Read Only access.

When your Web browser connects with the Agent Module’s Web agent, the home page is displayed.

The home page displays the Main Menu on the left-hand side of the screen and the System Information on the right-hand side. The Main Menulinks are used to navigate to other menus and displayconfiguration parameters and statistical data.

Configurable parameters have a dialog box or a drop-down list. Once a configuration change has been made on a page, be sure to click on the “Apply” button at the bottom of the page to confirm the new setting. Alternatively, you can click on the “Cancel” button to clear any changes prior to pressing the “Apply” button.

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Main Menu

Menu Description

System Information Provides system description, including system name and other

Stack Browser Provides a graphical representation of the stack, access to

MIB Browser Access to MIB II, Repeater MIB, Ethernet-Like MIB and

RMON Browser Access to Statistics, History, Alarm and Event groups. Help Help on using the Web management interface.

data.

SNMP agent, hub and port parameters.

Cabletron’s private MIB parameters.

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System Information

Field Description

System Description System hardware description. System Object ID Objectidentifier for the hub’s network management subsystem

Sys. Up Time Time since the hub was last powered on. System Name* Name assigned to the hub system. Contact* Contact person for the system. Location* Spec ifies the area or location where the system resides. System Services Specifies services for the 7-layer network protocol.

* Maximum stri ng length is 255, but the screen only displays 44 characters. You can use the arrow keys to browse the whole string.

as defined in M IB II.

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Stack Browser

Item Description

Stack Displays the front panel graphic representation of all the hubs

Agent Access to configuration of IP address and SLIP IP address for

Hub Displays hub configuration data andenables hub to be isolated

Port Enablesconfigurationof port parameters, set s portsecurityand

Switch Module Access to the Switch/Media Module configuration and

in a stack.

the SNMP agent.

from the stack backplane.

port backup features.

statistics.

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Front Panel

Select “Stack” then “FrontPanel” to display a graphicimage of the hub or attached stack.

Item Description

[Refresh] Immediately refreshes front panel status. Refresh Mode Select The scroll-down window includes options for:

“autoRefresh” of the front panel every 10 seconds, or “manual” refresh by pressing the [Refresh] button.

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Agent Configuration

Select “Agent” then “Agent Configuration”to display IP configuration and other information.

Item Description

IP Address IP address of the Agent Module you are managing. Valid IP

Subnet Mask Subnet mask of the Agent Module you are managing. This

Gateway IP Gateway used to pass trap messages from the management

SLIP IP IP address of the Agent Module used when accessing the

SLIP Subnet Mask Subnet mask for the SLIP IP address of the Agent Module. SLIP Gateway SLIP gateway IP address used to pass traffic to the network

Agent Attached to The network segment (10 Mbps or 100 Mbps) to which the

addresses consist of four numbers, of 0 t o 255, and separated by periods. (The default address is 0.0.0.0.)

mask identifies the hostaddress bits used for routing to specific subnets. (The default subnet mask is 0. 0.0.0. )

agent to the net work m anagement station. Note that the gateway must be def ined if the management station is located in a different I P segment. (The default gateway is 0.0.0.0.)

configuration program via an out- of-band SLIP connection to the serial port.

management station. No te that the gateway must be defined if the management station is located in a different IP segment.

Agent Module is attached.

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Hub Configuration

Select “Hub” then “Hub Configuration” to display hardware and firmware configurationof the hub.

Item Description

Hub ID Hub identifier in stack . Model The model number of this hub. Hardware Version Version number of the hub hardware. Repeater Serial No. Serial number of this hub. System Version System firmware version. POST Version Version number of the Agent Module’s Power-on Self-test. Agent Status Indicates if an Agent Module is installed and active. Agent Hardware

Version Agent Serial No. Serial number of the Agent Module. Agent MAC Address Physical address of the active Agent Module. Agent Baud rate Rate at which data is sent between the Agent Module’s serial

Switch Module Indicates if a switch/m edia module is installed. Number of Ports Indicates whether this device has 12 or 24 repeater ports.

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Hardware version number of the Agent Module.

port and the connected device. The supported baud ra te is 9600 bps.

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Hub Backplane

Select“Hub” then“Hub Backplane”to displayinformationabout thehub’s connection to the stack’s backplane.

Item Description

Hub ID Hub identifier in the stack. Backplane ID The hub’s segment, 100 Mbps (1) or 10 Mbps (2). Select a

Backplane Status Select to isolate or attach the hub’s repeater bus to the stack

segment to display/configure in the Backplane Status field.

backplane then press [Apply].

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Port Configuration

Select “Port” then “Port Configuration” to display information about the port’s connection, or to display/configure the port’s security setting.

Item Description

Hub ID Hub identifier in the stack. Port ID Port number to configure. Current Speed Indicates the transmission speed currently used by this port. Set Speed Selects the port speed, 100 Mbps, 10 Mbps or Auto-Detected. Admin State Allows you to disable a port due to abnormal behavior (e.g.,

Link State Partition State Indicates if the port is partitioned.

Port Security Setting

Authentication Address

Auto-Learn Action When active, the authorized address is copied from the device

Auto-Learn Status Displays Auto-Learn status as Inactive, Active or Learned. Intrusion One of t hese actions can be selected if intrusion is detected:

excessive collisions), then re-enable it after the problem has been resolved. You may also disable a port for security reasons.

Indicates if the port has a valid connection to an external device.

MAC address of the device authorized to access this port.

currently attached to this port.

INACTIVE - Detection disabled. WARNING AND DISABLE - Sends a message to Trap Managers and disables the violated port.

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Port Backup

Select “Port” then “Port Backup” to display/configure redundant links.

Item Description

Index Identifier for up to 15 backup port pairs. Primary Hub Hub ID for the master port. Primary Port Port identifier for the master port. Secondary Hub Hub ID for the slave port. Secondary Port Port identifier for the slave port. Action Each backup pair can be set to Active or Inactive. Status Active is displayed if the backup port has taken over the link.

Inactive is displayed if the primary port is still handling the link. Standby is displayed if there is no link on the primary port.

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Switch Module Statistics

Select “Switch Module” then “Switch Module Statistics” to display statistics for the switch/media module.

Item Description

Readable Frames Number of good frames received by the port. Readable Octets Number of good octets received by the port. FCS Errors Number of FCS errors. Alignment Errors For 10 Mbps ports, the counter records alignment errors (mis-

Frames Too Long Number of times frame length has exceeded the maximum

Short Events Number of short fragments. Runts Number of fragments (that were to o long to qualify as short

Collisions Number of simultaneous node transmissions detected by this

Late Events Number of frames where a collision occurred late in the

Data Rate Mismatches Number of frames for which the data rate does not match the

Broadcast Packets Total number of broadcast packets detected. Multicast Packets Total number of multicast packet s detected. [Refresh] Immediately refre shes st atistics. Refresh Mode Select The scroll-down window includes options for:

Values are counted from the time the Control Table entry was created.

synchronized data packets). For 100 Mbps ports, the counter records the sum of alignment errors and code errors (frames received with rxerror signal).

allowable size (i.e., 1518 bytes).

events).

device.

transmission.

local frequency.

“autoRefresh” of the front panel every 10 seconds, or “manual” refresh by pressing the [Refresh] button.

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MIB Browser

The MIB Browser menu allows access to various MIB group data and statistics. This guide provides only a summary of the MIBs supported by the Agent Module. All MIB group objects are as defined by RFC 1213 (MIB II), RFC 2108 (Multi-Segment Repeater MIB), and RFC 1643 (Ethernet-LikeMIB). For further informationon specific MIB entries, refer to the on-line help provided by the Web Agent.

Menu Description

MIB II Browse through MIB II group objects for detailed statistics,

Repeater MIB Browse through Repeater MIB objects for segment, hub and

Cabletron MIB Cabletron’s private MIB enables configuration of C ommunity

settings and configuration options.

port statistics.

Names, Trap M anagers and initiation of a TFTP download for software upgrades.

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RMON Browser

TheRMONBrowser enables accesstothe RMONdatagroupssupported by the Agent Module. This guide only provides an outline of the menu items available. All Statistics, History, Alarm and Event group parameters are defined byRFC 1757(RMON MIB).Note thatthe controltable entries can only be set using SNMP-based network management software.

Menu Description

Statistics View the data for eachcontrol table entry intheStatistics group.

History View the History control table entries and the data collected for

Alarm View the control table entries for alarms. Event View the control table entries for events and the event log.

For the selected entry, view numeric data or graphical pie charts for packet size distribution and packet errors.

each entry. For the selected entry, view graphical displays of packet rates and utilization.

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Ethernet Statistics

TheRMONManager collects statistics that allowyouto quicklydetermine howthe networkis performing. Select“Statistics”then “StatisticsEntry”to display Ethernet statistics.

Item Description

Statistics Index Index for this item in the control table. Data Source MIB variable that is being monitored:

1.3.6.1.2.1.2.2.1.1.4 - 100 Mbps st ack backplane

1.3.6.1.2.1.2.2.1.1.5 - 10 Mbps stack back plane

1.3.6.1.2.1.2.2.1.1.6 - Stack Unit 1 100 Mbps segment

1.3.6.1.2.1.2.2.1.1.7 - Stack Unit 1 10 Mbps segment

...

1.3.6.1.2.1.2.2.1.1.16 - Sta ck Unit 6 100 Mbps segment

1.3.6.1.2.1.2.2.1.1.17 - Sta ck Unit 6 10 Mbps segment

Drop Events Numberof events detected whenpackets were dropped (dueto

Octets Total number of octets of data (including those in bad packets)

Packets Displays the total count for all packets, broadcasts, multicasts,

Broadcast Packets Number of br oadcast packets. Multicast Packets Number of multicast packets. CRC Alignment Errors Total number of packets with a CRC or alignment error. Undersize Packets Total number of undersize packets. Oversize Packets Total number of oversize packets. Fragments Total number of packet fragments.

a lack of resources condition in the probe).

received on the network (excluding framing bits but including FCS octets).

and dropped packets.

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Jabbers Total number of jabber errors. Collisions Total number of packet collisions. Packets 64 Octets N umber of packets less than 64 octets. Packets 64 to 127

Number of packets between 64 and 127 octe ts.

Octets Packets 128 to 255

Number of packets between 128 and 255 octe ts.

Octets Packets 256 to 511

Number of packets between 256 and 511 octe ts.

Octets Packets 512 to 1023

Number of packets between 512 and 1023 octe ts.

Octets Packets 1024 to 1518

Number of packets between 1024 and 1518 octe t s.

Octets Owner Person who added this entry to the control table. Status Indicates if this control entry has been set to valid or invalid. [Refresh] Immediately refreshes the status. Refresh Mode Select The scroll-down window includes options for:

“autoRefresh” of the screen every 10 seconds, or “manual” refresh by pressing the [Refresh] button.

Values are counted from the time the Control Table entry was created.

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Packets Pie Chart

Select “Statistics” then “Packets Pie Chart” to display the graphic representation of packet size distribution.

Item Description

Packets

64 Octets Number of packet s less than 64 octets. 64 to 127 O ctets Number of packets between 64 and 127 octe ts. 128 to 255 O ctets Number of packets between 128 and 255 octets. 256 to 511 O ctets Number of packets between 256 and 511 octets. 512 to 1023 Octets Number of packets between 512 and 1023 octets. 1024 to 1518 Octets Number of packets between 1024 and 1518 octets.

Residual Number of packets greater than 1518 octets. [Refresh] Immediately refreshes the status. Refresh Mode Select The scroll-down window includes options for:

Values are counted from the time the Control Table entry was created.

“autoRefresh” of the screen every 10 seconds, or “manual” refresh by pressing the [Refresh] button.

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Error Packets Ratio

Select “Statistics” then “Error Packets Ratio” to display the graphic representation of the distribution of error types.

Item Description

Broadcast Packets Percentage of broadcast packet errors. Multicast Packets Percentage of multicast packets errors. CRC Align Errors Percentage of CRC and alignment errors. Undersize Packets Percentage of undersize packets. Oversize Packets Percentage of oversize packets. Fragments Percentage of fragments. Jabbers Percentage of jabbers. Collisions Percentage of collisions. Residuals Percentage of remaining error types. [Refresh] Immediately refreshes the status. Refresh Mode Select The scroll-down window includes options for:

Values are counted from the time the Control Table entry was created.

“autoRefresh” of the screen every 10 seconds, or “manual” refresh by pressing the [Refresh] button.

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History Control Entry

RMONcanbeusedtocreatearecordofnetworkutilization,packettypes, errorsand collisions.You need a historicalrecord ofactivityto track down intermittentproblems. Historical data canalsobeusedto establishnormal baseline activity, which may reveal problems associated with high traffic levels, broadcast storms, or other unusual events. Historical information canalso beused topredict networkgrowth and plan for expansionbefore your network becomes too overloaded. Select “History” then “History Control Entry” to display the collection items defined in the history control table.

Item Description

History Index An index that uniquely identifies an entry in the History Control

Data Source MIB variable that is being monitored:

Buckets Requested Requested number ofdiscrete time intervals over which data is

Buckets Granted Number of discrete sampling intervals over which data shall

Interval Intervalin seconds over which the data is sampled for e ach

Owner Person who added this entry to the control table. Status Indicates if this control entry has been set to valid or invalid.

table. Each such entry defines a set of samples at a particular interval for an interface on the device.

1.3.6.1.2.1.2.2.1.1.1 - Agent board 100 Mbps interface

1.3.6.1.2.1.2.2.1.1.2 - Agent board 10 Mbps interface

1.3.6.1.2.1.2.2.1.1.3 - Serial port for out-of-band connection

1.3.6.1.2.1.2.2.1.1.4 - 100 Mbps st ack backplane

1.3.6.1.2.1.2.2.1.1.5 - 10 Mbps stack back plane

1.3.6.1.2.1.2.2.1.1.6 - Stack Unit 1 100 Mbps segment

1.3.6.1.2.1.2.2.1.1.7 - Stack Unit 1 10 Mbps segment

...

1.3.6.1.2.1.2.2.1.1.16 - Sta ck Unit 6 100 Mbps segment

1.3.6.1.2.1.2.2.1.1.17 - Sta ck Unit 6 10 Mbps segment

to be saved in the part of the media-specific table associated with this entry.

actually be saved in the part of the media-specific table associated with this entry.

bucket in the part of the media-s pecific table associated with this entry.

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History Data Entry

Select “History” then “History Data Entry” to display the data recorded for items in the history control table.

Item Description

History Index An index that uniquely identifies an entry in the History Control

Refresh Time Interval Interval at which data displayed to the screen is refreshed. Sample Index An index thatuniquely identifies theparticular sample this entry

Interval Start Value of sysUpTime at the start of the interval over which this

Drop Events Total number of events in which packets were dropped by the

Octets Total number of octets of data (including those in bad packets)

Packets Numberof packet s (including bad packets)received during this

Broadcast Packets Number of good packets received during this sampling interval

Multicast Packets Number of good packets received during this sam pling interval

table. Each such entry defines a set of samples at a particular interval for an interface on the device.

History Indexes can include: 100 Mbps segment with samples taken every 30 seconds, 100 Mbps segment with samples taken every 1800 seconds, 10 Mbps segment with samples taken every 30 seconds, or 10 Mbps segment with samples taken every 1800 seconds.

representsamong all samplesassociated with the samehistory control entry. This index starts at 1 and increases by one as each new sample is taken.

sample was measured.

probe due to lack of resources during this sampling interval. This number isnot necessarily the number of packetsdropped, it is just the number of times this condition has been detected.

received on the network (excluding framing bits but including FCS octets).

sampling interval.

that were directed to the broadcast address.

thatwere directed toa multicast address. This number does not include packets addressed to the broadcast address.

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CRC Alignment Errors Num ber of packets received during this sampling interval that

had a length (excluding framing bits but including FCS octets) between 64 and 1518 octets, inclusive, but had either a bad Frame Check Sequence (FCS) with an integral number of octets (FCS Err o r) or a bad FCS w ith a non-integral number of octets (Alignment Error).

Undersize Packets Number of packets received during this sampling interval that

were less than 64 octets long (excluding framing bits but including FCS octets) but were otherwise well form ed.

Oversize Packets Number of packets received during this sampling interval that

were longer than 1518 octets (excluding framing bits but including FCS octets) but were otherwise well form ed.

Fragments Total number of packets received during this sampling interval

that were less t han 64 octets in length (excluding framing bits but including FCS octets), had either a bad Fram e Ch eck Sequence (FCS) with an integral number of octets (FCS Error) or a bad FCS with a non-integral number of octets (Alignment Error). Note that it is entirely normal for etherHistoryFragments to increment. This is because it count s both runts (which are normal occurrences due to collisions) and noise hits.

Jabbers Num ber of packets received during this sampling interval that

were longer than 1518 octets (excluding framing bits but including FCS octets), and had either a bad Frame Check Sequence (FCS) with an integral number of octets (FCS Error) or a bad FCS with a non-integral number of octets (Alignment Error).

Collisions Best estimate of the total number of collisions on this Ethernet

segment during this sampling interval.

Utilization Best estimate of the mean physical layer netwo rk utilization on

this interface during this sampling interval, in hundredths of a

percent. [Refresh] Immediately refreshes the status. Refresh Mode Select The scroll-down window includes options for:

“autoRefresh” of the screen every 10 seconds, or

“manual” refresh by pressing the [Refresh] button.

Values are counted from the time the Control Table entry was created.

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Rate Bar Chart

Select “History” then “Rate Bar Chart” to display the recorded rate of packets, broadcasts,multicasts and collisions collected for the selected segment. The scale for the graphic display is automatically adjusted to present the best view possible. (However, the smallest increment on the vertical axis is limited to 0.05.).

Item Description

History Index Selections include: (1) 100 Mbps segment with count

Packets/sec Rate at which packets (including bad packets) were receive d

Broadcasts/sec Rate at which packets were received during this sampling

Multicasts/sec Rateat which packets were received during this sampling

Collisions/sec Rate ofcollisionson this Ethernet segmentduringthis sampling

[Refresh] Immediately refreshes the status. Refresh Mode Select The scroll-down window includes options for:

Values are counted from the time the Control Table entry was created.

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incremented every 30 seconds, (2) 100 Mbps segment with count incremented every 1800 seconds , (3) 10 Mbps segment with count incremented every 30 seconds, (4) 10 Mbps segment with count incremented every 1800 seconds.

during this sampling interval.

interval that were directed to the broadcast address.

interval that were directed to a multicast address. This number does not include packets addressed to the broadcast address.

interval.

“autoRefresh” of the screen every 10 seconds, or “manual” refresh by pressing the [Refresh] button.

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Utilization

Select “History” then “Utilization” to display the percentage of bandwidth utilized over the sample period.

Item Description

Utilization Displays the bandwidth utilization for the selected segment.

History Index selections include: (1) 100 Mbps segment with

utilization incremented every 30 seconds, (2) 100 Mbps

segment with utilization incr emented every 1800 seconds, (3)

10 Mbps segment with utilization incr ement ed every 30

seconds, (4) 10 Mbps segment with packet count incremented

every 1800 seconds. [Refresh] Immediately refreshes the status. Refresh Mode Select The scroll-down window includes options for:

Values are counted from the time the Control Table entry was created.

“autoRefresh” of the screen every 10 seconds, or

“manual” refresh by pressing the [Refresh] button.

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