Cabletron Systems 100 User Manual

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ELS100-16TX

SmartSTACK 100

ELS100-16TX

USER GUIDE

EPIM100

PORT STATUS MODE

STATUS

TX ACT FDX MON

PWR

CPU

RESET

COM

RX COL 100 USR

13579111315

LINK

STATUS

LINK

STATUS

2 4 6 8 10 12 14 16

1X 3X 5X 7X

2X 4X 6X 8x

9X 11X 13X 15X

10X 12X 14X 16X

EPIM100

9032405-01

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NOTICE

Only qualiﬁed personnel should perform installation procedures.

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

The hardware, ﬁrmware, or software described in this manual is subject to change without notice. IN NO EVENT SHALL CABLETRON SYSTEMS BE LIABLE FOR ANY INCIDENTAL,

INDIRECT, SPECIAL, OR CONSEQUENTIAL DAMAGES WHATSOEVER (INCLUDING BUT NOT LIMITED TO LOST PROFITS) ARISING OUT OF OR RELATED TO THIS MANUAL OR THE INFORMATION CONTAINED IN IT, EVEN IF CABLETRON SYSTEMS HAS BEEN ADVISED OF, KNOWN, OR SHOULD HAVE KNOWN, THE POSSIBILITY OF SUCH DAMAGES.



Order Number: 9032405-01

Cabletron Systems, SPECTRUM ELS100-16TX, ELS10-26TX, EPIM-100FX, FEPIM, FEPIM-TX and FEPIM-FX

of Cabletron Systems, Inc.

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

, and

LANVIEW

are registered trademarks and

SmartSTACK,

are trademarks

FCC NOTICE

This device complies with Part 15 of the FCC rules. Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.

NOTE:

This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to Part 15 of the FCC rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment. This equipment uses, generates, and can radiate radio frequency energy and if not installed in accordance with the operator’s manual, may cause harmful interference to radio communications. Operation of this equipment in a residential area is likely to cause interference in which case the user will be required to correct the interference at his own expense.

WARNING:

party responsible for compliance could void the user’s authority to operate the equipment.

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

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Notice

DOC NOTICE

This digital apparatus does not exceed the Class A limits for radio noise emissions from digital apparatus set out in the Radio Interference Regulations of the Canadian Department of Communications.

Le présent appareil numérique n’émet pas de bruits radioélectriques dépassant les limites applicables aux appareils numériques de la class A prescrites dans le Règlement sur le brouillage radioélectrique édicté par le ministère des Communications du Canada.

VCCI NOTICE

This is a Class A product based on the standard of the Voluntary Control Council for Interference by Information Technology Equipment (VCCI). If this equipment is used in a domestic environment, radio disturbance may arise. When such trouble occurs, the user may be required to take corrective actions.

CABLETRON SYSTEMS, INC. PROGRAM LICENSE AGREEMENT

IMPORTANT:

This document is an agreement between you, the end user, and Cabletron Systems, Inc. (“Cabletron”) that sets forth your rights and obligations with respect to the Cabletron software program (the “Program”) contained in this package. The Program may be contained in ﬁrmware, chips or other media. BY UTILIZING THE ENCLOSED PRODUCT, YOU ARE AGREEING TO BECOME BOUND BY THE TERMS OF THIS AGREEMENT, WHICH INCLUDES THE LICENSE AND THE LIMITATION OF WARRANTY AND DISCLAIMER OF LIABILITY. IF YOU DO NOT AGREE TO THE TERMS OF THIS AGREEMENT , PR OMPTLY RETURN THE UNUSED PRODUCT TO THE PLACE OF PURCHASE FOR A FULL REFUND.

Before utilizing this product, carefully read this License Agreement.

Page 5

Notice

CABLETRON SOFTWARE PROGRAM LICENSE

1. LICENSE

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

2. OTHER RESTRICTIONS. You may not reverse engineer, decompile, or disassemble the

Program.

3. APPLICABLE LA W. 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.

. You have the right to use only the one (1) copy of the Program provided in this

EXCLUSION OF WARRANTY AND DISCLAIMER OF LIABILITY

1. EXCLUSION OF

writing, Cabletron makes no warranty, expressed or implied, concerning the Program (including its documentation and media).

CABLETRON DISCLAIMS ALL WARRANTIES, OTHER THAN THOSE SUPPLIED TO YOU BY CABLETRON IN WRITING, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, WITH RESPECT TO THE PROGRAM, THE ACCOMP ANYING WRITTEN MA TERIALS, AND ANY A CCOMP ANYING HARDWARE.

2. NO LIABILITY FOR CONSEQUENTIAL DAMAGES. IN NO EVENT SHALL

CABLETRON OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER (INCLUDING, WITHOUT LIMITATION, DAMAGES FOR LOSS OF BUSINESS, PROFITS, BUSINESS INTERRUPTION, LOSS OF BUSINESS INFORMATION, SPECIAL, INCIDENTAL, CONSEQUENTIAL, OR RELIANCE DAMAGES, OR OTHER LOSS) ARISING OUT OF THE USE OR INABILITY TO USE THIS CABLETRON PRODUCT, EVEN IF CABLETRON HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. BECAUSE SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES, OR ON THE DURATION OR LIMITATION OF IMPLIED WARRANTIES, IN SOME INSTANCES THE ABOVE LIMITATIONS AND EXCLUSIONS MAY NOT APPLY TO YOU.

WARRANTY. Except as may be specifically provided by Cabletron in

UNITED STATES GOVERNMENT RESTRICTED RIGHTS

The enclosed product (a) was developed solely at private expense; (b) contains “restricted computer software” submitted with restricted rights in accordance with Section 52227-19 (a) through (d) of the Commercial Computer Software - Restricted Rights Clause and its successors, and (c) in all respects is proprietary data belonging to Cabletron and/or its suppliers.

For Department of Defense units, the product is licensed with “Restricted Rights” as deﬁned in the DoD Supplement to the Federal Acquisition Regulations, Section 52.227-7013 (c) (1) (ii) and its successors, and use, duplication, disclosure by the Government is subject to restrictions as set forth in subparagraph (c) (1) (ii) of the Rights in Technical Data and Computer Software clause at

252.227-7013. Cabletron Systems, Inc., 35 Industrial Way, Rochester, New Hampshire 03867-0505.

iii

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Notice

DECLARATION OF CONFORMITY

Application of Council Directive(s):

Manufacturer’s Name:

Manufacturer’s Address:

European Representative Name:

European Representative Address:

Conformance to Directive(s)/Product Standards:

Equipment T ype/Environment:

W e the undersigned, hereby declare, under our sole responsibility, that the equipment packaged with this notice conforms to the above directives.

Manufacturer Legal Representative in Europe

89/336/EEC 73/23/EEC

Cabletron Systems, Inc. 35 Industrial Way

PO Box 5005 Rochester, NH 03867

Mr. J. Solari Cabletron Systems Limited

Nexus House, Newbury Business Park London Road, Newbury Berkshire RG13 2PZ, England

EC Directive 89/336/EEC EC Directive 73/23/EEC EN 55022 EN 50082-1 EN 60950

Networking Equipment, for use in a Commercial or Light Environment.

Industrial

Mr. Ronald Fotino Mr. J. Solari

___________________________________ ___________________________________

Full Name Full Name Principal Compliance Engineer Managing Director - E.M.E.A.

___________________________________ ___________________________________

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

___________________________________ ___________________________________

Location Location

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CHAPTER 1 INTRODUCTION

1.1 ABOUT THIS MANUAL........................................................................1-1

1.2 GETTING HELP.......................................................................................1-2

1.3 DOCUMENT CONVENTIONS.............................................................1-3

1.4 RELATED DOCUMENTATION ...........................................................1-4

1.5 OVERVIEW...............................................................................................1-5

1.5.1 SmartSTACK 100 ELS100-16TX Architecture............................1-6

1.5.2 SmartSTACK 100 ELS100-16TX Bridge Address Table..........1-11

1.5.3 SmartSTACK 100 ELS100-16TX Port Mirroring......................1-12

1.5.4 SmartSTACK 100 ELS100-16TX Sample Applications...........1-12

1.6 LOCAL CONSOLE MANAGER..........................................................1-17

1.6.1 Command Syntax Conventions.................................................1-18

1.6.2 Basic LCM Commands................................................................1-19

CHAPTER 2 UNPACKING AND INSTALLING

YOUR ELS100-16TXTX

2.1 ELS100-16TX FRONT PANEL................................................................2-1

2.2 INSTALLING AN EPIM.........................................................................2-4

2.3 INSTALLING THE ELS100-16TX..........................................................2-6

2.4 CHECKING THE POWER-UP DIAGNOSTICS SEQUENCE...........2-8

2.5 CONNECTING THE LOCAL CONSOLE MANAGER .....................2-8

2.6 CONNECTING TO THE NETWORK...................................................2-9

2.6.1 Connecting UTP Cables..............................................................2-10

2.6.2 Connecting a Segment to the EPIM-100FX ..............................2-11

CHAPTER 3 CONFIGURING YOUR ELS100-16TX

3.1 ASSIGNING IP ADDRESSES.................................................................3-2

3.1.1 Displaying IP Addresses...............................................................3-4

3.1.2 Deleting an IP Address.................................................................3-4

3.1.3 Changing a Subnet Mask..............................................................3-4

3.2 ENABLING BRIDGING..........................................................................3-5

3.3 DISABLING BRIDGING.........................................................................3-6

3.4 DISPLAYING BRIDGING FUNCTIONS .............................................3-6

3.5 ENABLING TRUNKING........................................................................3-7

3.6 DISABLING TRUNKING.....................................................................3-10

3.7 DISPLAYING TRUNKING STATUS..................................................3-11

3.8 ENABLING PORT MIRRORING ........................................................3-13

3.9 DISABLING MIRRORING...................................................................3-13

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Contents

3.10 DISPLAYING MIRRORING STATUS ..............................................3-14

3.11 DEFINING AND DELETING WORKGROUPS..............................3-16

3.12 ASSIGNING A COMMUNITY NAME.............................................3-18

3.13 CONFIGURING BROADCAST/MULTICAST STORM

PROTECTION ......................................................................................3-19

3.14 MODIFYING MIB VARIABLES.........................................................3-20

3.15 SYSTEM CONTACT............................................................................3-20

3.16 SYSTEM NAME ...................................................................................3-21

3.16.1 System Location .........................................................................3-21

3.16.2 Community Names....................................................................3-21

3.16.3 Aging Parameter........................................................................3-22

CHAPTER 4 MONITORING AND MANAGING

YOUR ELS100-16TX

4.1 ELS100-16TX MANAGEMENT TOOLS...............................................4-1

4.2 ELS100-16TX STATISTICS......................................................................4-1

4.2.1 Gathering Statistics........................................................................4-2

4.2.2 System Statistics.............................................................................4-2

4.2.3 Ethernet Port Statistics ..................................................................4-3

4.3 USING LCM TO CHECK ELS100-16TX STATUS...............................4-4

4.3.1 Displaying Status...........................................................................4-4

4.3.2 Displaying MAC Addresses.........................................................4-6

4.3.3 Displaying Manufacturing Information.....................................4-8

4.4 MANAGING THE ELS100-16TX...........................................................4-9

4.5 USING LCM TO MANAGE THE ELS100-16TX..................................4-9

4.5.1 Disabling a Port............................................................................4-10

4.5.2 Enabling a Port.............................................................................4-10

4.5.3 Changing a Subnet Mask............................................................4-11

4.5.4 Changing a Community Name..................................................4-12

4.5.5 Setting the Baud Rate ..................................................................4-13

4.5.6 Setting a Reboot Time..................................................................4-14

CHAPTER 5 ELS100-16TX DIAGNOSTICS AND

TROUBLESHOOTING

5.1 POWER-UP DIAGNOSTICS ..................................................................5-1

5.1.1 Power-up LED Sequence ..............................................................5-1

5.1.2 Specific Power-up Tests ................................................................5-2

5.1.3 Software Checksum Comparison................................................5-2

5.1.4 Power-up Diagnostics Results .....................................................5-3

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Contents

5.2 RESPONSES TO FAILURES AT POWER-UP......................................5-3

5.3 STATUS AND ACTIVITY INDICATORS............................................5-3

5.4 TROUBLESHOOTING............................................................................5-6

5.5 ELS100-16TX DOES NOT POWER UP.................................................5-6

5.5.1 Connectivity Problems..................................................................5-6

5.5.2 ELS100-16TX Has Rebooted.........................................................5-7

5.5.3 ELS100-16TX Does Not Respond to NMS..................................5-7

APPENDIX A TECHNICAL SPECIFICATIONS

A.1 ELS100-16TX Specifications..................................................................A-1

A.2 Serial Cable Pin Assignments ..............................................................A-3

A.3 100BASE-T Pin Assignments................................................................A-4

A.4 Straight-through Wiring .......................................................................A-5

A.5 Crossover Wiring...................................................................................A-5

A.6 The 5 - 4 - 3 Rule.....................................................................................A-6

A.7 EPIM-100FX Specifications...................................................................A-6

APPENDIX B GLOSSARY

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Contents

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CHAPTER 1

INTRODUCTION

1.1 ABOUT THIS MANUAL

This manual is for system administrators responsible for conﬁguring, monitoring, and maintaining the SmartSTACK 100 ELS100-16TX. You should have a familiarity with networking concepts and principles. In addition, a basic understanding of SNMP is helpful.

Some SmartSTACK 100 ELS100-16TX conﬁgurations can only be done using an SNMP-based Network Management System (NMS). Where applicable, this manual provides instructions for using the Local Console Manager (LCM) to perform basic conﬁguration. Where it is not possible to use LCM, general instructions and guidelines applicable to most NMSs are provided.

The contents of each chapter are described below.

• Chapter 1, and provides an overview of the SmartSTACK 100 ELS100-16TX’s switching functions, applications, and the Local Console Manager (LCM).

• Chapter 2, describes the SmartSTACK 100 ELS100-16TX front and rear panels, how to install the SmartST ACK 100 ELS100-16TX, how to connect the Local Console Manager (LCM), and how to connect the ELS100-16TX

• Chapter 3, instructions for conﬁguring the SmartSTACK 100 ELS100-16TX using the Local Console Manager (LCM). It also provides some common Management Information Base (MIB) variables you may want to change.

• Chapter 4, describes how to monitor SmartST ACK 100 ELS100-16TX status and statistics. It also describes how to manage the SmartST ACK 100 ELS100-16TX Ethernet ports using the Local Console Manager (LCM).

Introduction

Unpacking and Installing Your ELS100-16TX

to the network.

Configuring Your ELS100-16TX

Monitoring and Managing Your ELS100-16TX

, outlines the contents of this manual

, provides

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Introduction

• Chapter 5,

ELS100-16TX Diagnostics and Troubleshooting

, describes the SmartSTACK 100 ELS100-16TX diagnostics and provides information on troubleshooting common problems.

• Appendix A,

Technical Specifications

, provides the SmartSTACK 100 ELS100-16TX speciﬁcations and basic cabling pin assignments.

• Appendix B,

Glossary

, provides a glossary of terms both speciﬁc to the SmartSTACK 100 ELS100-16TX and common to the networking ﬁeld.

1.2 GETTING HELP

For additional support related to this device or document, contact the Cabletron Systems Global Call Center:

Phone (603) 332-9400 Internet mail support@ctron.com FTP ctron.com (134.141.197.25)

BBS (603) 335-3358

Modem setting 8N1: 8 data bits, No parity, 1 stop bit

For additional information about Cabletron Systems or its products, visit the World Wide Web site: For technical support, select

To send comments or suggestions concerning this document, contact the Cabletron Systems Technical Writing Department via the following email address:

Make sure to include the document Part Number in the email message.

http://www.cabletron.com/

TechWriting@ctron.com

anonymous your email address

Service and Support

Before calling the Cabletron Systems Global Call Center, have the following information ready:

• Your Cabletron Systems service contract number

• A description of the failure

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Introduction

• A description of any action(s) already taken to resolve the problem (e.g., changing mode switches, rebooting the unit, etc.)

• The serial and revision numbers of all involved Cabletron Systems products in the network

• A description of your network environment (layout, cable type, etc.)

• Network load and frame size at the time of trouble (if known)

• The device history (i.e., have you returned the device before, is this a recurring problem, etc.)

• Any previous Return Material Authorization (RMA) numbers

1.3 DOCUMENT CONVENTIONS

The following conventions are used throughout this document: LCM commands, prompts, and information displayed by the

computer appear in Courier typeface, for example:

Current Number of Learned Addresses: 133

Information that you enter appears in Courier bold typeface, for example:

ELS100-16 >

status

Information that you need to enter with a command is enclosed in angle brackets < >. For example, you must enter a port number and an IP address to execute the

ipaddr <port #> <IP address>

command:

ELS100-16 >

ipaddr 6 192.138.217.40

Field value options appear in bold typeface.

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Introduction

The following conventions are also used in this document:

Note:

Calls the reader’s attention to any item of information that may be of special importance.

Tip:

Caution:

Conveys helpful hints concerning procedures or actions.

Contains information essential to avoid damage to the equipment.

Warning:

Warns against an action that could result in equipment damage, personal injury or death.

1.4 RELATED DOCUMENTATION

The following documentation may assist the user in using this product:

•

Getting Started with the SmartST ACK 100 ELS100-16TX

the basic information for using the SmartSTACK 100 ELS100-16TX.

- contains

•

Interconnections, Bridges and Routers,

Radia Perlman, Addison

•

Internetworking with TCP/IP: Principles, Protocols, and Architecture

(2nd edition), Volumes I and II, Douglas Comer, Prentice Hall ©

1991.

•

The Simple Book, An Introduction to Management of TCP/IP-based internets

1-4

, Marshall T . Rose, Prentice Hall © Second Edition, 1994.

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Introduction

1.5 OVERVIEW

The SmartSTACK 100 ELS100-16TX is an intelligent Ethernet-toEthernet switch that is conﬁgured with 16 IEEE 802.3 10/100BASE-T autosensing Ethernet ports. The SmartSTACK 100 ELS100-16TX provides the option of substituting RJ45 ports 15 and 16 (either or both) with two EPIM ports. These ports accept the EPIM-100FX.

The ELS100-16TX also includes an RS232C port for out-of-band management. Figure 1-1 shows the front panel for the SmartSTACK 100 ELS100-16TX.

ELS100-16TX Front Panel

EPIM100

9X 11X 13X 15X

10X 12X 14X 16X

EPIM100

ELS100-16TX

PORT STATUS MODE

STATUS

TX ACT FDX MON

PWR

CPU

RESET

COM

RX COL 100 USR

13579111315

LINK

STATUS

LINK

STATUS

2 4 6 8 10 12 14 16

1X 3X 5X 7X

2X 4X 6X 8x

Figure 1-1. SmartSTACK 100 ELS100-16TX Front Panel

The SmartSTACK 100 ELS100-16TX

• Provides dedicated bandwidth for each network connected to its ports.

• Provides full store and forward bridging functionality and modiﬁed cut through operation.

• Provides complete error checking functionality.

• Provides port trunking to increase bandwidth.

• Provides port mirroring capability for enhanced troubleshooting.

• Supports Auto-negotiation.

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Introduction

• Operates in either Half Duplex or Full Duplex modes on all ports.

• Implements the Spanning Tree protocol (802.1d).

• Conﬁgured with factory-set defaults for immediate plug-andplay capability (IP address is not conﬁgured at factory).

In addition, the SmartSTACK 100 ELS100-16TX offers the following features that can help you manage and maintain your network:

• RMON support.

• Conﬁguration and management using the Simple Network Management Protocol (SNMP) with either an in-band or out-ofband connection.

• Protection against broadcast/multicast storms.

• Ability to deﬁne virtual workgroups for more efﬁcient bandwidth usage. The SmartST ACK 100 ELS100-16TX ports can be segmented into 8 separate broadcast domains.

• Compilation of statistics (by port) for trafﬁc from each user device connected to a SmartSTACK 100 ELS100-16TX segment.

1.5.1 SmartSTACK 100 ELS100-16TX Architecture

The SmartSTACK ELS100-16TX is a feature rich desktop switch supporting full wire speed throughput. The SmartSTACK ELS100-16TX brings enhanced performance and capabilities to workgroup and departmental networks by allowing the network administrator to conﬁgure the SmartSTACK ELS100-16TX to operate in a modiﬁed cut through mode that increases performance for larger packets.

The SmartST ACK ELS100-16TX supports 8192 MAC addresses and is compliant with the IEEE 802.1d Spanning Tree protocol. In addition, the SmartSTACK ELS100-16TX offers full address learning and ﬁltering, while protecting against error propagation.

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Introduction

The SmartSTACK ELS100-16TX goes beyond switching basics incorporating unique management features, including, RMON statistics and Broadcast/multicast storm protection, proactive alarms, and both in-band and out-of-band SNMP management.

The SmartSTACK ELS100-16TX uses an ASIC-based switching engine with the ﬂexibility and performance required for today's networking demands.

Ethernet switching allows customer to scale bandwidth by segmenting the network into smaller pieces providing the required amount of bandwidth to individual users or LAN segments. Ethernet switching protects the customer’s investment in Ethernet network hardware by preserving installed shar ed LAN equipment such as repeaters and hubs, network interface cards, cabling, applications, and network operating systems, while re-deploying high-speed switches where necessary to support today’s bandwidth demands.

The SmartST ACK ELS100-16TX will operate in either 10 Mbps half or full duplex or 100 Mbps half or full duplex modes. Utilization of Fast Ethernet 100 Mbps connections provides a 10 fold increase in data rate per segment while preserving the basic network operation and frame format.

The SmartSTACK 100 ELS100-16TX is protocol-transparent, meaning it can handle different types of network trafﬁc regardless of the network protocol, such as IP and IPX. As the SmartSTACK 100 ELS100-16TX reads addresses from the packets it processes, it builds a dynamic database of addresses called the

Table

. In this way, the SmartSTACK 100 ELS100-16TX continuously

Bridge Address

learns the addresses of all connected devices. Consequently, you can add new devices to the network, change device addresses, and remove devices from the network without having to reconﬁgure the SmartSTACK 100 ELS100-16TX.

The Open System Interconnection (OSI) Reference Model, developed by the International Standards Organization (ISO), identiﬁes the levels of functionality inherent in each of its seven layers. The SmartSTACK 100 ELS100-16TX operates at the Media

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Introduction

Access Control (MAC) sub-layer of the Data Link layer. Figure 1-2 shows the OSI Reference Model.

Application Presentation

6 5

Session Transport

4 3

Network

Data Link

Physical

Figure 1-2. OSI Reference Model

ELS100-16TX operates at Layer 2

Port T runking

Another performance enhancing feature of the SmartSTACK ELS100-16TX is Port Trunking. The SmartSTACK ELS100-16TX allows two Trunk groups of up to eight 10 Mbps or 100 Mbps ports to be connected between the SmartSTACK ELS100-16TX and network devices including Cabletron’s SmartStack 10, FastNET products and ATX LAN switch. This capability provides a scalable dedicated bandwidth in a single trunk group of up to 1.6 Gbps (full duplex) when using 100BaseX ports or 160Mbps (full duplex) when using the ports in 10BaseT mode. This is accomplished without introducing any emerging technologies such as Gigabit Ethernet or ATM. By connecting multiple SmartSTACK ELS10016TX products using port trunking, the network administrator can create a virtual chassis (spanning multiple physical chassis), providing many-switched Ethernet and Fast Ethernet ports at a very low cost per port.

Autonegotiation

Auto-negotiation is supported on all of the 16 switched Ethernet

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Introduction

ports allowing the switch port and an attached device to negotiate for full or half-duplex modes of operation. The SmartSTACK 100 ELS100-16TX also supports auto-negotiation as deﬁned by IEEE

802.3u and will automatically set the port to the proper mode (10 Mbps, half/full duplex or, 100 Mbps half/full duplex). The EPIM100-FX interface will not support auto-negotiation, as auto negotiation for ﬁber is not deﬁned in the 802.3u speciﬁcation.

Store and Forward Switching

As an intelligent Ethernet switch, the SmartSTACK 100 ELS100-16TX uses store and forward switching. Store and forwar d switching allows the SmartSTACK 100 ELS100-16TX to temporarily store packets until network resources, typically an unused link, are available for forwarding. This allows for complete error checking, and limits the amount of time between when a device requests access to the network and when it is granted permission to transmit. In addition, full store and forward switching ensures data integrity, thus preventing network error conditions from being generated throughout the network.

Discarding Local Trafﬁc

The SmartSTACK 100 ELS100-16TX checks all incoming packets for their destination address against the Bridge Address Table. If a packet’s destination address is not on the same network segment as the originating packet, the SmartSTACK 100 ELS100-16TX forwards the packet to the network segment associated with that destination address, if known. However, if the packet’s source and destination address are on the same network segment, known as

local trafﬁc

the SmartSTACK 100 ELS100-16TX). For example, a ﬁle transmitted from Workstation A to Workstation

C in Figure 1-3 does not need to leave LAN 1. The SmartSTACK 100 ELS100-16TX connected to LANs 1 and 2 sees all trafﬁc from LAN 1, including LAN 1 local trafﬁc.

, the packet is automatically discarded (i.e., ignored by

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Introduction

ELS100-16TX

FastNet 10

LAN 1

ABC

Figure 1-3. Typical Switching Application

LAN 2

By forwarding only packets addressed to devices on other network segments, the SmartST ACK 100 ELS100-16TX reduces unnecessary trafﬁc and thereby enhances the overall performance of the network.

Note:

If the packet address is not found in the Bridge Address Table, it will be forwarded (flooded) to all network segments.

Spanning T ree Algorithm

The SmartSTACK 100 ELS100-16TX supports the IEEE 802.1d Spanning Tree algorithm. The Spanning Tree algorithm converts multiple LANs into a “spanning tree” of networks. It is used to prevent bridging loops. This standard deﬁnes a logical (not physical) network conﬁguration consisting of one extended LAN without active duplicate paths between spanning tree bridges.

The SmartSTACK 100 ELS100-16TX, along with other IEEE 802.1d Spanning Tree compliant bridges in the network, dynamically conﬁgure the network topology into a single Spanning Tree by exchanging Bridge Protocol Data Units (BPDUs). Typically, each LAN segment is sent one BPDU every two seconds (this is the default setting).

When there are multiple SmartSTACK 100 ELS100-16TXs connecting LANs in a loop, the Spanning Tree algorithm determines which SmartSTACK 100 ELS100-16TX should forward

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Introduction

packets to the LAN. If there is a cable break or a port failure, the network topology is automatically reconﬁgured by the Spanning Tree protocol to create an alternate path to the LAN.

1.5.2 SmartSTACK 100 ELS100-16TX Bridge Address Table

The SmartSTACK 100 ELS100-16TX creates and maintains a dynamic database of addresses called the Bridge Address Table. The SmartSTACK 100 ELS100-16TX examines every packet to determine its source address and LAN segment origin. It then compares the source address and segment information it ﬁnds to the entries in the Bridge Address Table.

If a packet’s address is not already stored in the Bridge Address Table, the SmartSTACK 100 ELS100-16TX adds the learned address, associated segment number, and a timer value indicating the age of the observation. Consequently, the SmartSTACK 100 ELS100-16TX knows the address and associated segment number the next time it sees that address. By using the information stored in the Bridge Address Table, the SmartSTACK 100 ELS100-16TX is able to quickly forward each packet to the correct LAN segment.

The SmartSTACK 100 ELS100-16TX learns addresses from all packets, including data transmissions and “keep alive” packets (packets sent by an idle station to let other stations know it is present and functional). When devices are added to the network, removed from it, or relocated, you do not have to reconﬁgure the SmartST ACK 100 ELS100-16TX. The unit automatically learns new device addresses, recognizes when a previously used address is missing, or when a device has been moved to a new LAN segment.

An address stored in the Bridge Addr ess Table is discarded if there is no subsequent activity from that address after a conﬁgured length of time (ﬁve minutes by default). This aging process ensures that the Bridge Address Table is continually updated.

Addresses are continually added to and deleted from the Bridge Address Table, reﬂecting the dynamic nature of internetwork trafﬁc.

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Introduction

Each dynamic entry includes:

• An Ethernet MAC address

• A single port number of the LAN on which the address resides

• The age of the entry The SmartSTACK 100 ELS100-16TX stores 8192 dynamic (learned)

entries in its Bridge Address Table.

1.5.3 SmartSTACK 100 ELS100-16TX Port Mirroring

Port monitoring allows the SmartSTACK 100 ELS100-16TX to redirect network trafﬁc (good packets only) from multiple ports to the port selected for mirroring, in effect “mirroring” all network trafﬁc to this port. This feature allows users who have existing investments in external analyzers, external RMON probes, or devices like Network General's Distributed Sniffer System continue to receive expert analysis and packet decode functions in a switched environment -- simply use the port mirroring function to mirror switched trafﬁc to the designated “diagnostic” port to which the analyzer is attached.

1.5.4 SmartSTACK 100 ELS100-16TX Sample Applications

Just as a six lane highway allows you to travel much faster than a single lane highway, a network backbone creates high-speed connections for your network. In general, a network backbone allows you to distribute access to important network resources such as ﬁle or print servers. Additional SmartSTACK 100 ELS100-16TX features, such as trunking, Fast Ethernet, and virtual workgroups allow you to optimize bandwidth and design a more efﬁcient ﬂow for your network trafﬁc.

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Introduction

SmartSTACK 100 ELS100-16TX Trunking

The SmartSTACK 100 ELS100-16TX allows two trunk groups with up to eight ports each to be connected between the SmartSTACK 100 ELS100-16TX and other devices in the FastNetwork and SmartSTACK families. This capability provides a scalable dedicated bandwidth of up to 1.6 Gbps for 100 Mbps ports.

For example, local trafﬁc, such as the Manufacturing Department’s internal trafﬁc, can be easily handled by a single, 10 Mbps connection. However , when the Manufacturing Department needs access to the corporate database, the trafﬁc could travel over a trunk line, thereby increasing the speed of transmission.

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Introduction

Figure 1-4 illustrates the trunking of multiple SmartSTACK 100 ELS100-16TX ports to increase the bandwidth.

LAN Segments

ELS100-16TX

Up to1.6 Gbps

Bandwidth

100 Mbps

PORT STATUS MODE

STATUS PWR

CPU

RESET

COM

13579111315

LINK STATUS

TXACT FDXMON

LINK STATUS

RXCOL 100 USR

2 4 6 8 1012 1416

1X 3X 5X 7X

2X 4X 6X 8x

100 Mbps

EPIM100

9X 11X 13X 15X

EPIM100

10X 12X 14X 16X

Trunk Lines

ELS100-16TX

PORT STATUS MODE

STATUS PWR

CPU

RESET

COM

100 Mbps

EPIM100

9X 11X 13X 15X

1X 3X 5X 7X

13579111315

LINK STATUS

TXACT FDXMON

LINK STATUS

RXCOL 100 USR

2 4 6 8 1012 1416

2X 4X 6X 8x

10X 12X 14X 16X

EPIM100

100 Mbps

LAN Segments

Figure 1-4. SmartSTACK 100 ELS100-16TX Trunking with 100 Mbps Ports

Virtual Workgr oups

The SmartSTACK 100 ELS100-16TX allows you to deﬁne ports for logical groups of associated devices (virtual workgroups) to provide a more efﬁcient ﬂow of trafﬁc across your Ethernet network. You can deﬁne a maximum of eight virtual workgroups.

Virtual workgroups offer you the ability to limit broadcasts to logical domains within the network. Workgroup destinations are recognized by the SmartSTACK 100 ELS100-16TX and broadcast packets are routed directly to hosts within the workgroup, eliminating the need to perform a general broadcast across each segment of the network to ﬁnd speciﬁc host addresses.

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Introduction

Figure 1-5 shows two Ethernet segments, A and B, that do not include a SmartSTACK 100 ELS100-16TX.

Repeater

Traffic

Figure 1-5. Multiple Ethernet Segments Sharing 100 Mbps Bandwidth

Traffic

Each host on segments A and B is limited to sharing a network bandwidth of 10 Mbps.

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Introduction

Figure 1-6 shows two Ethernet segments that take advantage of the virtual workgroup feature of the SmartSTACK 100 ELS100-16TX and the increased bandwidth applied to each A and B host.

Router

Workgroup A

COM

ELS100-16TX

2X 4X 6X 8x

10X 12X 14X 16X

9X 11X 13X 15X

1X 3X 5X 7X

PORT STATUS MODE

13579111315

LINK

STATUS

TXACT FDXMON

PWR

LINK

CPU

RESET

STATUS

RXCOL 100 USR

2 4 6 8 1012 1416

ELS100-16TX

EPIM100

Workgroup B

Figure 1-6. Using the SmartSTACK 100 ELS100-16TX to Create Virtual

Workgroups to Help Optimize Bandwidth

A host from workgroup A can limit a broadcast to all hosts within workgroup A and prevent the broadcast from going across the network and adding to the amount of contention for the limited 100 Mbps bandwidth.

Ports that are not part of a workgroup will receive and transmit packets from any ports. However, if you conﬁgure the SmartSTACK 100 ELS100-16TX with workgroup A and B, as shown in Figure 1-6, broadcast trafﬁc from workgr oup A ports will not be seen on workgroup B ports, and vice versa.

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Introduction

As illustrated in the previous diagram, virtual workgroups allow you to associate multiple ports and deﬁne a workgroup. In reality, you are assigning workgroup IDs to SmartSTACK 100 ELS100-16TX ports.

1.6 LOCAL CONSOLE MANAGER

The Local Console Manager (LCM) is a command-line interface built into the SmartSTACK 100 ELS100-16TX. The LCM enables you to monitor, manage, and conﬁgure the SmartSTACK 100 ELS100-16TX through the out-of-band RS232C connection attached to any non-intelligent terminal or workstation running terminal emulation.

You can also use a Cabletron Systems Network Management System, or a standard SNMP-based Network Management System, to manage the SmartSTACK 100 ELS100-16TX. For a list of available SmartSTACK 100 ELS100-16TX network management tools, see Section 4.1,

ELS100-16TX Management Tools

The following sections describe LCM command syntax and the basic LCM commands for logging in, logging out, and getting help.

• LCM commands used for conﬁguring the SmartSTACK 100 ELS100-16TX are described in Chapter 3,

ELS100-16TX

Configuring Your

• LCM commands used for monitoring and managing the SmartSTACK 100 ELS100-16TX are described in Chapter 4,

Monitoring and Managing Your ELS100-16TX

Note:

The

Getting Started with the SmartSTACK 100 ELS100-16TX

guide lists the available LCM commands, including each command’s options.

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Introduction

1.6.1 Command Syntax Conventions

The following conventions apply as you use LCM commands:

Enter

• Press the

•A

port range

numbers separated by commas or hyphens. For example, port

3; 3,7

are ports

• To quit any command, press the Control-C keys (^C or Ctrl-C).

• You can abbreviate any command where ther e is no ambiguity; if there is ambiguity, LCM responds with an error message.

• Commands are not case sensitive.

• Invalid commands or misspellings returns an error message.

• The previous command can be repeated by typing !!

key to execute a command after you type it in.

is either a single port number, or a list of port

are ports 3 and

3,4,5, and 7.

are ports 3,4, and 5; and 3-5,7

7; 3-5

• MAC addresses are displayed in little-endian Ethernet (least signiﬁcant bit) bit order, with each octet separated by a colon. For example:

ELS100-16 >address 00:40:27:04:1a:0f

• Information that you need to enter with an LCM command is enclosed in square brackets [ ]. For example, you must enter a port number and an IP address to execute the

NUMBER] [IP ADDRESS]

ELS100-16 >ipaddr 6 192.138.217.40

command:

ipaddr [PORT-

• Parameters that appear in all capital letters, for example bridge

[PORT-RANGE]

, indicate that you must enter a value for that parameter . If a string of parameters is displayed between braces, for example

[{off|on|noBPDU}], you must select one of the

displayed options. For example, if you wanted to enable bridging on a port, or a range of ports, you would enter:

ELS100-16 >bridge 2-4 on

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Introduction

1.6.2 Basic LCM Commands

If you are going to manage the SmartSTACK 100 ELS100-16TX using LCM, you ﬁrst must connect the SmartSTACK 100 ELS100-16TX to an ASCII terminal or terminal emulator. See Section 2.5, Connecting the Local Console Manager, for instructions.

When you want to use LCM, begin by pressing the Enter key several times to get the LCM prompt (

ELS100-16TX >).

Help

Displays the menu of available commands. Help can also be displayed by typing a question mark (?). The output from the command is displayed follows.

help

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Introduction

ELS100-16 > help

help or ? this menu

status [PORT-RANGE] to display unit or port status

baud [BAUD-RATE] to change the console baud rate

exit or logout to logout

erase to erase configuration information

ident to display unit identification

ipaddr [PORT# IPADDR [MASK]] to set or display IP addresses

addresses display [any] [ADDR [MASK]] to display learned addresses

bridge [PORT-RANGE [OPTIONS]] to set bridging methods

clearstats to clear all port statistics

trunk [PORT-RANGE [{on|off}]] to set or display trunking status

enable [PORT-RANGE [noRIP]] to enable a set of ports

disable [PORT-RANGE] to disable a set of ports

community to change the password/community name

sttimer [TIMER-VALUE] to set or display st age timer

workgroup [NAME [delete|PORT-RANGE [INFO]]] to set or display workgroups

speed [PORT-RANGE [{auto|10|100}]] to set or display speed

duplex [PORT-RANGE [{auto|half|full}]] to set or display duplex mode

mirror [PORT# {Rx|Tx|both|off}] to set or display port mirroring

time [SystemTime (HHMMSS)] to set or display the system time

date [SystemDate (MMDDYYYY)] to set or display the system date

reboot (SECONDS|off) to reboot the unit after seconds

arp display to display the arp table

route display [IPADDR] to display routing table information

ping [-rvsx] HOST [DATASIZE [COUNT]] to send ICMP ECHO_REQUEST pkts to tgt

ELS100-16TX Local Console Manager

traplog to display the most recent SNMP traps

ELS100-16 >

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Introduction

Erase

Entering erase to erase the current SmartSTACK 100 ELS100-16TX conﬁguration returns all parameters to the default values.

Exit or Logout

Logs you out of LCM. (The exit command is functionally equivalent to the

logout command.)

Traplog

Displays the traps messages captured by the SmartSTACK 100 ELS100-16TX. The following is an example of a traplog display:

ELS100-16> traplog

Trap 16 0:00:00

The unit has booted.

Trap 25 0:00:00

The unit’s spanning tree maximum age has changed.

Trap 26 0:00:00

The unit’s spanning tree hello time has changed.

Trap 27 0:00:00

The unit’s spanning tree forward delay times has changed.

Trap 3 0:00:02 port 1

The current functional state of the port has changed.

...

ELS100-16>

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Introduction

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CHAPTER 2

UNPACKING AND INSTALLING

YOUR ELS100-16TX

Carefully unpack the ELS100-16TX from the shipping carton and inspect it for possible damage. If any damage is evident, contact your supplier. The shipping carton contains the following:

• The ELS100-16TX unit

• One AC power cord

• Console Cable kit

• Two rack-mounting brackets with fasteners (for rack-mount installation)

• Documentation – In addition to this manual, the Getting Started with the SmartST ACK 100 ELS100-16TX guide, and Release Notes are also included.

Only qualiﬁed personnel should perform installation procedures.

2.1 ELS100-16TX FRONT PANEL

The ELS100-16TX provides 16 IEEE 802.3 10/100 BASE-T autosensing Ethernet ports. The ELS100-16TX provides the option of substituting ports RJ45 ports 15 and 16 (either or both) with two EPIM ports. These ports accept the EPIM-100FX.

Each ELS100-16TX also includes an RS232C port for out-of-band management. Figure 2-1 shows the ELS100-16TX’s front panel. The LEDs and buttons are described in Tables 2-1 and 2-2.

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Unpacking and Installing Your ELS100-16TX

Reset Switch

PWR

CPU

RESET

ELS100-16TX

COM

Status Button

Com Port

Port LEDs

100BASE-T EPIM Ports

Status LEDs

PORT STATUS MODE

STATUS

TX ACT FDX MON

RX COL 100 USR

13579111315

LINK

STATUS

LINK

STATUS

2 4 6 8 10 12 14 16

1X 3X 5X 7X

2X 4X 6X 8x

9X 11X 13X 15X

10X 12X 14X 16X

RJ45 Ethernet 100BASE-T Ports

Figure 2-1. ELS100-16TX Front Panel

EPIM100

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Unpacking and Installing Your ELS100-16TX

Table 2-1. Meaning of ELS100-16TX LEDs

LED State Meaning

Port Status Mode TX

Indicates port is transmitting a packet.

ACT

COL

FDX

On Off

100

On Off

MON

On Blink

USR

Link (Individual Ports)

Status (Individual Ports)

On Off

On/ Blink

CPU On

Off

Indicates port is receiving a packet.

Indicates port is transmitting or receiving. Indicates a collision on a port.

Port is operating in Full Duplex. Port is operating in Half Duplex. Port operating at 100 Mbps. Port operating at 10 Mbps. Indicates the monitor port. Indicates the port(s) being monitored. Indicates that errored packets were received.

Indicates the link is good. Indicates there is no link.

Indicates you are monitoring the port for a selected segment status condition. This LED always indicates the selected status mode.

Indicates the ELS100-16TX is operational. Blinking – Indicates the ELS100-16TX is running power-up diagnostics. Indicates the ELS100-16TX is nonoperational.

Pwr On

Off

On – Indicates the ELS100-16TX is receiving power and the voltage is within the acceptable range. Indicates the ELS100-16TX is not receiving power.

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Unpacking and Installing Your ELS100-16TX

Table 2-2 describes the ELS100-16TX buttons.

Table 2-2. Description of ELS100-16TX Buttons

Button Function

Status Cycles through the Segment Status options (TX, RX,

Act, Col, FDX, 100, MON, and Usr) for all ports. The right-hand port status LEDs of the ports you are monitoring are activated based on what function you chose with the Select button.

Reset Restarts the ELS100-16TX.

2.2 INSTALLING AN EPIM

The ELS100-16TX provides two slots for a Cabletron EPIM-100FX (Ethernet Port Interface Module). The ELS100-16TX is shipped without EPIMs. To install an EPIM, follow the procedure below:

1. Remove the coverplate or the existing EPIM (whichever applies).

2. Slide the new EPIM into place, making sure that the connectors on the rear of the EPIM align correctly and ﬁrmly with the connector inside the ELS100-16TX. Refer to Figure 2-2.

3. Install the mounting screw.

Caution: When removing an EPIM, pull the module straight out to

prevent damage to the connector.

Note: The EPIM is hot swappable. Also, the RJ45 port corresponding to

the EPIM port is disabled once an EPIM is installed.

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9X 11X 13X 15X

Unpacking and Installing Your ELS100-16TX

EPIM100

LNK

EPIM-100FX

10X 12X 14X 16X

EPIM100

Figure 2-2. Installing an EPIM

LNK

EPIM-100FX

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Unpacking and Installing Your ELS100-16TX

2.3 INSTALLING THE ELS100-16TX

Rack-Mounting an ELS100-16TX

Table 2-3 describes some general considerations you should be aware of before mounting an ELS100-16TX in a rack assembly.

Table 2-3. General Considerations for Mounting an ELS100-16TX

Consideration Discussion

Temperature Since the temperature within a rack assembly

may be higher than the ambient room temperature, make sure the rack environment temperature is within the Operating Temperature range speciﬁed in Appendix A.

Air Flow Make sure there is at least 2 inches (or more)

on both sides of the ELS100-16TX to allow for adequate air ﬂow.

Mechanical Loading Do not place equipment on top of a rack-

mounted ELS100-16TX.

Circuit Overloading Make sure the power supply circuit to the

rack assembly is not overloaded.

Grounding (Earthing)

Rack-mounted equipment should be grounded. In addition to the direct connections to the main power supplies, make sure all the other supply connections are also grounded.

The ELS100-16TX can be rack-mounted in a standard 19-inch equipment cabinet. To mount the ELS100-16TX in a rack assembly, apply the following steps:

1. Attach the rackmount brackets to either side of the ELS10016TX chassis, as shown in Figure 2-3.

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Unpacking and Installing Your ELS100-16TX

Rackmount

Brackets (2)

EPIM100

ELS100-16TX

PORT STATUS MODE

STATUS

TX ACT FDX MON

PWR

CPU

RESET

COM

RX COL 100 USR

STATUS

13579111315

LINK

2 4 6 8 10 12 14 16

1X 3X 5X 7X

2X 4X 6X 8x

10X 12X 14X 16X

9X 11X 13X 15X

Screws (4)

Figure 2-3. Attaching Rackmount Brackets

2. Place the ELS100-16TX chassis in the cabinet.

3. Secure the ELS100-16TX with the rackmount fasteners by inserting and securing a fastener through each of the four slots in the rackmount brackets, as shown in Figure 2-4.

19-Inch Rack

EPIM100

ELS100-16TX

PORT STATUS MODE

LINK

STATUS

TX ACT FDX MON

PWR

CPU

RESET

COM

RX COL 100 USR

LINK

STATUS

13579111315

2 4 6 8 10 12 14 16

1X 3X 5X 7X

2X 4X 6X 8x

9X 11X 13X 15X

10X 12X 14X 16X

Screws (4)

Figure 2-4. Rack-mounting the ELS100-16TX

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Unpacking and Installing Your ELS100-16TX

4. Once the ELS100-16TX is installed, plug the AC power cord into the AC power connector on the rear of the ELS100-16TX chassis. Plug the other end of the power cord into a threeprong grounded outlet.

2.4 CHECKING THE POWER-UP DIAGNOSTICS SEQUENCE

Before connecting any devices to the ELS100-16TX, power on the unit and observe the power-up diagnostics sequence to check for proper operation.

To observe the power-up diagnostics sequence completely, you may want to repeat it. To restart the power-up sequence, press the reset button on the front panel.

When you power up the ELS100-16TX, the following occurs:

1. The Power (Pwr) LED is on.

2. The CPU LED starts ﬂashing. Two of the Port Status Mode LEDs are on.

3. After several seconds, the CPU LED will stay on and only one Port Status LED is lit. This indicates the power-up diagnostics sequence is complete.

Note: If a critical component fails diagnostics, the CPU LED will turn off

and the ELS100-16TX will attempt to reboot. If the CPU LED does not stay on, contact the Cabletron Systems Global Call Center.

Refer to Section 1.2.

2.5 CONNECTING THE LOCAL CONSOLE MANAGER

The Local Console Manager (LCM) is a command-line interface for conﬁguring, monitoring, and managing the ELS100-16TX through the out-of-band RS232C connection on the front panel.

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Unpacking and Installing Your ELS100-16TX

To connect the LCM:

1. Connect your ASCII terminal or terminal emulator to the outof-band management RS232C port on the front panel of the ELS100-16TX using the standard RJ-45 twisted pair cable shipped with the unit. (Only three wires are necessary: Receive Data, Transmit Data and Ground.)

2. Set the terminal to 9600 baud, 8N1: 8 data bits, 1 stop bit, no parity, and no ﬂow control.

3. Press the Enter key several times. If the ELS100-16TX and terminal are operational, LCM responds with the

prompt.

ELS100-16TX

4. LCM is now ready to use.

Refer to Section 1.6, Local Console Manager, for a general overview of LCM and the command syntax. LCM commands for conﬁguring, monitoring, and managing the ELS100-16TX are provided in the chapters dealing with those topics.

2.6 CONNECTING TO THE NETWORK

This section provides the procedures for connecting UTP and multimode ﬁber optic segments from the network or other devices to the ELS100-16TX.

The ELS100-16TX is conﬁgured with 16 IEEE 802.3 10/100 BASE-T autosensing RJ45 Ethernet ports. The ELS100-16TX provides the option of substituting RJ45 ports 15 and 16 (either or both) with two EPIM ports. These ports accept the EPIM-100FX, which have SC style MMF connectors.

Refer to Section 2.6.1 to make UTP connections. Refer to Section 2.6.2 to make a ﬁber optic connection to an

EPIM-100FX.

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Unpacking and Installing Your ELS100-16TX

2.6.1 Connecting UTP Cables

Before connecting a segment to the ELS100-16TX, check each end of the segment to verify wire crossover.

Caution: To establish a link, you must have an odd number of crossovers

(preferably one) between 10/100 BASE-T devices of the same type (i.e., from repeater to repeater or transceiver to transceiver).

Connect a twisted pair segment to the ELS100-16TX as follows:

1. Ensure that the device at the other end of the segment is connected to the segment and is powered ON.

2. Refer to Figure 2-5. Connect the twisted pair segment to the ELS100-16TX by inserting the RJ45 connector on the twisted pair segment into the desired RJ45 port.

9X 11X 13X 15X

1X 3X 5X 7X

9111315

135

PORT STATUS MODE

LINK

STATUS

TX ACT FDX MON

ELS100-16TX

RX COL 100 USR

LINK

STATUS

2 4 6 8 10 12 14 16

PWR

CPU

RESET

COM

2X 4X 6X 8x

10X 12X 14X 16X

Figure 2-5. ELS100-16TX Twisted Pair Connection

3. Verify that a Link exists by checking that the port LINK LED is on (solid green). If the LINK LED is off, perform the following steps until it is on:

a. Check that the 10/100 BASE-T device at the other end of

the twisted pair segment is ON and connected to the segment.

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Unpacking and Installing Your ELS100-16TX

b. Verify that the RJ45 connectors on the twisted pair segment

have the proper pinouts (Figure 2-6) and check the cable for continuity.

Note: RX+/RX- and TX+/TX- must share a common color pair.

Figure 2-6. Cable Pinouts - (RJ45) Crossover Cable

ELS10-26 RJ-45 Port

TX+

TX-

RX+

RX-

10Base-T Device Port

TX+

1 2

RX+

3 6

c. Check that the twisted pair connection meets the dB loss

and cable specifications.

If a link is not established, contact Cabletron Systems Global Call Center. Refer to Section 1.2, Getting Help, for details.

4. Repeat step 2, above, until all connections have been made.

2.6.2 Connecting a Segment to the EPIM-100FX

TX-

RX-

The EPIM-100FX has an SC style network port. Cabletron Systems supplies ﬁber optic cable that uses SC style connectors that are keyed to ensure proper crossing over of the transmit and receive ﬁbers.

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Unpacking and Installing Your ELS100-16TX

Caution: An odd number of crossovers (preferably one) must be

maintained between devices so that the transmit port of one device is connected to the receive port of the other device and vice versa.

If the ﬁber optic cable being used has SC style connectors that do not resemble MIC style connectors, or has SC connectors on one end and a different type on the other, such as ST connectors, ensure that the proper crossing over occurs.

Fiber Optic Network Connection

1. Remove the protective plastic covers from the ﬁber optic ports on the applicable port on the module and from the ends of the connectors.

Caution: Do not touch the ends of the fiber optic strands, and do not let

the ends come in contact with dust, dirt, or other contaminants. Contamination of the ends causes problems in data transmissions. If the ends become contaminated, clean them with alcohol using a soft, clean, lint-free cloth.

2. Insert one end of the SC connector into the EPIM-100FX installed in the ELS100-16TX. See Figure 2-7.

3. At the other end of the ﬁber optic cable, attach the SC connector to the other device.

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Unpacking and Installing Your ELS100-16TX

EPIM100

LNK

EPIM-100FX

LNK

EPIM-100FX

9X 11X 13X 15X

10X 12X 14X 16X

Figure 2-7. EPIM-100FX Port

4. V erify that a Link exists by checking that the port LINK LED is solid green. If the LINK LED is off, perform the following steps until it is on:

a. Check that the power is turned on for the device at the

CONFIGURING Y OUR ELS100-16TX

The ELS100-16TX does not require any additional conﬁguration to operate as a standard, transparent switch. However, if you want to use any of the ELS100-16TX advanced functions, you must ﬁrst assign an IP (Internet Protocol) address to any of the ports on the ELS100-16TX that you use to communicate with a Simple Network Management Protocol (SNMP) manager.

To initially assign an IP address, you can use the Local Console Manager (LCM). LCM is a command-line interface built into the ELS100-16TX. It allows you to conﬁgure and manage the ELS10016TX through the out-of-band RS232C connection attached to any non-intelligent terminal, or a PC emulating a non-intelligent terminal. (See Section 3.1, Assigning IP Addresses.)

Once you have assigned an IP address, you can use any of the following network management tools to conﬁgure and manage the ELS100-16TX:

• SPECTRUM

• SPEL

• SPMA

• Any SNMP-based NMS Conﬁguration parameters are stored in an SNMP standard

Management Information Base (MIB). All ELS100-16TX MIB variables are listed and described in the ELS100-16TX Release Notes.

Note: There are some configuration options that cannot be configured

using LCM commands. You may need to modify your configuration using an NMS. See Section 3.14, Modifying MIB Variables.

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Conﬁguring Y our ELS100-16TX

The following sections describe how to conﬁgure the optional parameters of the ELS100-16TX using LCM commands, including:

• Assigning IP addresses

• Enabling and disabling bridging

• Displaying bridging functions

• Enabling and disabling trunking

• Displaying trunking status

• Deﬁning and deleting virtual workgroups

• Assigning a community name

Note: You can use the LCM

erase

command to erase all configuration information and return the unit to default settings on the next system reset. The

erase

command also clears any IP addresses.

If you are using a network management tool other than LCM, refer to its accompanying documentation.

3.1 ASSIGNING IP ADDRESSES

You can assign an IP to each port, or you can assign one address that can be used for the the entire device. Addresses for each port must be unique. IP addresses are divided into classes based on what portion of the address is network or port information. The address classes are A, B, and C.

• Class A addresses are used in very large networks that support many ports. The ﬁrst byte identiﬁes the network and the other three bytes identify the node. The ﬁrst byte of a class A address must be in the range 1–126. The address 100.125.110.10 would identify node 125.110.10 on network 100.

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Conﬁguring Y our ELS100-16TX

• Class B addresses are used for medium sized networks. The ﬁrst two bytes identify the network and the last two identify the node. The ﬁrst byte of a class B address must be in the range 128–191. The address 128.150.50.10 identiﬁes node 50.10 on network 128.150.

• Class C addresses are used for small networks. The ﬁrst three bytes identify the network and the last byte identiﬁes the node. The ﬁrst byte of a class C address must be in the range 192–223. The address 192.138.217.10 identiﬁes node 10 on network

192.138.217.

To assign an IP address to a port, at the LCM prompt:

1. Type

ipaddr <PORT-NUMBER> <IP ADDRESS>

For example, ipaddr 6 192.138.217.40 would set the IP address of Port 6 to 192.138.217.40. LCM responds by displaying the IP address table, as shown under the ipaddr command.

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Conﬁguring Y our ELS100-16TX

3.1.1 Displaying IP Addresses

To display IP addresses, subnet masks, and MAC addresses of all ports on the ELS100-16TX you are conﬁguring, at the LCM prompt:

1. T ype

ipaddr

LCM displays the current IP address table, for example:

Port

IP Address Address Mask MAC Address

192.138.217.1

0.0.0.0

192.138.217.10

0.0.0.0

192.138.217.20

192.138.217.50

7 . . .

192.138.217.30 255.255.255.0

255.255.255.0

255.0.0.0

255.255.255.0

255.0.0.0

255.255.255.0

00:40:27:00:06:1f 00:40:27:00:06:c3 00:40:27:00:06:3e 00:40:27:00:03:7a 00:40:27:00:05:c7 00:40:27:00:04:4a 00:40:27:00:06:9e

00:40:27:00:04:b4

3.1.2 Deleting an IP Address

To delete an IP address, at the LCM prompt:

1. Type ipaddr <PORT-NUMBER> 0.0.0.0 LCM responds by redisplaying the current IP address table.

3.1.3 Changing a Subnet Mask

You can optionally set the subnet mask for a port. A subnet mask is a 32-bit address mask used in IP to specify a particular subnet. If the subnet mask is 0.0.0.0, the ELS100-16TX will automatically convert the displayed mask to the standard default, based on the port’s IP address class. (Class A address masks are 255.0.0.0, Class B address masks are 255.255.0.0, Class C address masks are

255.255.255.0.)

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To change the subnet mask, at the LCM prompt:

1. Type ipaddr <PORT-NUMBER> <IP ADDRESS> <SUBNET MASK> For example, ipaddr 6 192.138.217.40 255.255.240.0 would set

the subnet mask for port 6 to 255.255.240.0. LCM responds by redisplaying the current address table.

Note: When you change the subnet mask for a port, you must also enter

the IP address for that port. Make sure you enter the IP address for the port correctly; whatever you enter becomes the IP address for that port.

3.2 ENABLING BRIDGING

The LCM bridge command allows you to set bridging options for a single port or a range of ports. The options include:

• off

• on (the default with BPDU enabled)

•noBPDU BPDU (Bridge Protocol Data Unit) is a data unit transmitted as part

of the IEEE 802.1d Spanning T r ee protocol. The exchange of BPDUs allows bridges within a network to logically conﬁgure the network as a single spanning tree.

Note: Selecting the noBPDU option could make your network inoperable

because the ELS100-16TX would be unable to detect loops.

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Using LCM to enable bridging for a port or port range, at the LCM prompt:

1. T ype

bridge [PORT-RANGE [{off|on|noBPDU}]]

For example, bridge 2 on would enable bridging on port 2. LCM responds:

Port 2 bridging: Transparent Bridging

3.3 DISABLING BRIDGING

To turn off the bridging function for a port or port range, at the LCM prompt:

1. Type

bridge [PORT-RANGE] off

For example, bridge 2 off would disable bridging on port 2. LCM responds:

Port 2 bridging: Off

3.4 DISPLAYING BRIDGING FUNCTIONS

To display the bridging functions that are enabled for all ports, at the LCM prompt:

1. Type

bridge

LCM responds with a list of all ports and the bridging function that is enabled. For example, typing

bridge would display the

bridging status for all ports.

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Usage: bridge [PORT-RANGE [{off|on|noBPDU{]]

Port 1 bridging: Transparent Bridging Port 2 bridging: Transparent Bridging Port 3 bridging: Transparent Bridging

Port 4 bridging: Transparent Bridging

. . .

Port 16 bridging: off

You could also type bridge [PORT-RANGE] to look at a speciﬁc range of ports. For example

bridge 2-4 would display bridging

functions for ports 2, 3, and 4.

3.5 ENABLING TRUNKING

If your network conﬁguration requires you to connect two or more ELS100-16TXs (or other devices capable of trunking) together, but the applications you are running over the network require more than 100 Mbps of bandwidth per connection, you can use the builtin trunking feature to increase bandwidth up to 1.6 Mbps, without installing additional hardware on your network.

Trunking is a Cabletron Systems proprietary extension to the

802.1d Spanning Tree algorithm. It enables you to use multiple 100BASE-T Ethernet segments to connect ELS100-16TXs together, while maintaining ﬁrst-in, ﬁrst-out ordering of Ethernet packets. In addition, if any of the Ethernet segments conﬁgured for trunking become inoperable, those Ethernet segments are automatically bypassed.

Figure 3-1 shows two ELS100-16TXs connected by four 100BASE-T crossover cables. You can connect up to eight ports for sharing the traffic load. Any additional connected ports will become standby ports. The connections must be point-to-point. That is, there cannot be any other devices on the Ethernet segments.

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RESET

COM

ELS100-16TX

EPIM100

9X 11X 13X 15X

PORT STATUS MODE

STATUS PWR

CPU

1X 3X 5X 7X

13579111315

LINK

STATUS

TXACT FDXMON

LINK

STATUS

RXCOL 100 USR

2 4 6 8 1012 14 16

2X 4X 6X 8x

10X 12X 14X 16X

EPIM100

100BASE-T Crossover Cables (providing 800 Mbps of bandwidth)

PORT STATUS MODE

LINK

STATUS

TXACT FDXMON

PWR

LINK

CPU

RESET

STATUS

RXCOL 100 USR

COM

ELS100-16TX

13579111315

2 4 6 8 1012 14 16

1X 3X 5X 7X

2X 4X 6X 8x

9X 11X 13X 15X

10X 12X 14X 16X

ELS100-16TX

EPIM100

Figure 3-1. Trunk Connections

Trunk Groups

Each set of connections between two ELS100-16TXs is called a Trunk Group. Y ou can cr eate up to eight tr unk groups, each with up to eight ports, to interconnect your ELS100-16TXs.

For example, if you have three ELS100-16TXs (A, B, and C), as shown in Figure 3-2, you could connect them using a single Ethernet segment. However, that would limit the interconnection to 100 Mbps. To solve this problem, you could connect A to B with one Trunk Group, and connect B to C with a second Trunk Group.

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PWR

CPU

RESET

COM

ELS100-16TX

Trunk Group #1

PWR

CPU

RESET

COM

ELS100-16TX

Trunk Group #2

PWR

CPU

RESET

COM

ELS100-16TX

Figure 3-2. Trunk Groups

Conﬁguring Y our ELS100-16TX

EPIM100

ELS100-16TX A

ELS100-16TX B

ELS100-16TX C

9X 11X 13X 15X

PORT STATUS MODE

STATUS

PORT STATUS MODE

STATUS

PORT STATUS MODE

STATUS

1X 3X 5X 7X

13579111315

LINK

STATUS

TXACT FDXMON

LINK

STATUS

RXCOL 100 USR

2 4 6 8 1012 14 16

13579111315

LINK

STATUS

TXACT FDXMON

LINK

STATUS

RXCOL 100 USR

2 4 6 8 1012 14 16

13579111315

LINK

STATUS

TXACT FDXMON

LINK

STATUS

RXCOL 100 USR

2 4 6 8 1012 14 16

2X 4X 6X 8x

1X 3X 5X 7X

2X 4X 6X 8x

1X 3X 5X 7X

2X 4X 6X 8x

10X 12X 14X 16X

9X 11X 13X 15X

10X 12X 14X 16X

9X 11X 13X 15X

10X 12X 14X 16X

To enable trunking for the example shown, perform the following:

1. Connect the desired ports of the ELS100-16TXs together using 100BASE-T crossover cables.

If ELS100-16TX A is handling only a small number of users, the A to B Trunk Group could have just two ports per ELS10016TX. If ELS100-16TX B and C are expected to interconnect many users, you could use up to eight ports in the B to C Trunk Group.

2. Using LCM or an NMS, turn on trunking for the connected ports on each ELS100-16TX.

For ELS100-16TX A, at the LCM prompt: a. Type

trunk 2,3 on

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For ELS100-16TX B, at the LCM prompt: b. Type trunk 3-10,14-15 on For ELS100-16TX C, at the LCM prompt: c. Type trunk 3-10 on

Each ELS100-16TX determines which ports are part of which Trunk Group. After Trunk Group conﬁguration, the ELS10016TXs complete the standard 802.1d Spanning Tree state changes, treating each Trunk Group as a single 802.1d Spanning Tree port.

802.1d Spanning Tree takes about thirty seconds to resolve which ELS100-16TX ports are to become forwarding ports. As ports within a Trunk Group become forwarding ports, trafﬁc within the T runk Gr oup is momentarily halted to guarantee the ﬁrst-in, ﬁrst-out ordering of the Ethernet packets.

Note: The ELS100-16TX-to-ELS100-16TX connections must be point-

to-point. There cannot be any other devices on those Ethernets. The ports used for trunking can be in any order. However, both ends of the ELS100-16TX-to-ELS100-16TX connections must have trunking turned on for the ports that are being used for the connections.

3.6 DISABLING TRUNKING

To turn off trunking, at the LCM prompt:

1. Type trunk <PORT-RANGE> off For example, trunk 2-4 off

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3.7 DISPLAYING TRUNKING STATUS

To check the status of your current trunking conﬁguration, at the LCM prompt:

1. Type

trunk <PORT-RANGE>

The display could look like the following:

Note: IP Addresses are not required for trunking to function.

ELS100-16 > trunk 2-4

Port 2 trunking joined to Bridge MAC Addr 00:40:27:00:06:1f IP Addr 192.138.217.1 Port 3 trunking joined to Bridge MAC Addr 00:40:27:00:06:c3 IP Addr 192.138.200.2 Port 4 trunking joined to Bridge MAC Addr 00:50:36:00:07:4a IP Addr 192.140.250.7

To check the status for ports conﬁgured for trunking, at the LCM prompt:

1. Type

status <PORT-RANGE>

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The display could look like the following:

ELS100-16 > status 1

Port 1 Status

Type/Speed: 10B-TPX/10Mbits Port Mirroring: No Duplex Mode: Half Duplex Bridging: Transparent Bridging Enabled/Disabled: Enabled, Rip listening Spanning Tree: Forwarding Trunking State: Off Pkts Transmitted: 1693 Pkts Received: 0 Carrier Losses: 1693 Total Collisions: 0 Excess Collisions: 0 RX Missed pkts: 0 RX Runt pkts: 0 RX FCS/Align Errs: 0 Internal TX Errs: 0

Type <CR> to display port 2 status...>

The following conditions can be displayed:

• Broken — Trunking is enabled, but the port in non-operational.

• Closed (or Oneway) — Trunking is enabled, and the Trunking Protocol is attempting to establish a trunk connection.

• Helddown — T runking is enabled, but the trunk connection was rejected. After a short time-out period, another attempt is automatically initiated to establish a good trunk connection.

• Joined — Trunking is enabled, and the Trunking Protocol has established a good trunk connection.

• Off — Trunking is not enabled.

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• Perturbed — T runking is enabled, and a good tr unk connection has been established. However, the forwarding of data packets is temporarily suspended to allow for a change in the membership of the Trunk Group.

3.8 ENABLING PORT MIRRORING

The ELS100-16TX allows you to mirror the 10/100BASE-T ports on the ELS100-16TX. The mirroring of network trafﬁc is performed by the ELS100-16TX hardware, and the mirror image reﬂects only good packets. The ELS100-16TX mirroring function maintains packet ordering of bridging frames between the inbound and outbound interfaces.

Using the LCM or an NMS, you can mirror a port, and select to mirror all packets by a port (if the port is operating in half duplex).

To enable port mirroring on the ELS100-16TX:

1. Connect a network analyzer to the port you want to use as the mirror port on the ELS100-16TX.

2. Using the LCM or NMS, select the mirror port and the port or range of ports you want to mirror. Also select to mirror the received packets (Rx) or transmitted packets (Tx) or both. You must select one of these options or port mirroring will not function.

For example,

mirror 2 6 Tx

This will turn on mirroring for packets transmitted on port 2 and mirror them to port 6.

3.9 DISABLING MIRRORING

To turn off mirroring, at the LCM prompt:

1. Type Mirror <PORT> off

For example, mirror 2 off

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3.10 DISPLAYING MIRRORING STATUS

To check the status of your current mirroring conﬁguration, at the LCM prompt:

1. Type

mirror <PORT>

The display could look like the following:

ELS100-16> mirror 2

Port Mirroring: Port 1 is mirroring Tx traffic

. . . Port 16 mirroring off

Note: The

mirror command will display the status of all ports, even if a

specific port or range or ports is entered with the command.

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To check the status for ports conﬁgured for mirroring:

1. Type status <PORT>

The display could look like the following:

ELS100-16 > status 1

Port 1 Status

Type/Speed: 100B-TX/100Mbits Port Mirroring: No Duplex Mode: Half Duplex Bridging: Transparent Bridging Enabled/Disabled: Enabled, Rip listening Spanning Tree: Forwarding Trunking State: Off Pkts Transmitted: 1693 Pkts Received: 0 Carrier Losses: 1693 Total Collisions: 0 Excess Collisions: 0 RX Missed pkts: 0 RX Runt pkts: 0 RX FCS/Align Errs: 0 Internal TX Errs: 0

Type <CR> to display port 2 status...>

The following conditions can be displayed:

• Rx only — mirroring is enabled, but mirroring only packets received by the port.

• Tx only — mirroring is enabled, but mirroring only packets transmitted by the port.

• Rx and Tx — mirroring is enabled, mirroring both transmit and receive packets.

• No — mirroring is not enabled.

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3.11 DEFINING AND DELETING WORKGROUPS

The ELS100-16TX allows you to deﬁne logical groups of associated ports (virtual workgroups) to provide a more efﬁcient ﬂow of trafﬁc across your Ethernet network.

Virtual workgroups offer you the ability to limit broadcasts to logical domains within the network. Workgroup destinations are recognized by the ELS100-16TX and packets are routed directly to ports within the workgroup, eliminating the need to perform a general broadcast across each segment of the network to ﬁnd speciﬁc host addresses.

Figure 3-3 shows an ELS100-16TX that has been programmed to identify workgroups A and B. Workgroup A uses ports 3 through 5, 13 and 16 and workgroup B uses ports 7, 11 and 16. Port 16 connects a segment that contains both workgroup A and workgroup B hosts.

Router

3-16

Workgroup A

ELS100-16TX

EPIM100

9X 11X 13X 15X

ELS100-16TX

PORT STATUS MODE

STATUS

TXACT FDXMON

PWR

CPU

RESET

RXCOL 100 USR

COM

STATUS

LINK

13579111315

2 4 6 8 10 1214 16

1X 3X 5X 7X

2X 4X 6X 8x

10X 12X 14X 16X

EPIM100

Workgroup B

Figure 3-3. Deﬁning Virtual Workgroups

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The LCM commands used to create the previous conﬁguration are as follows:

1. To create workgroup A on ports 3, 4, 5, 13, and 16:

ESL10-26 > workgroup A 3-5,13,16

LCM responds with the following display:

Name: a Ports: 3, 4, 5, 13, 16 Info: All

2. To create workgroup B on ports 7, 11, and 16:

ESL10-26 > workgroup B 7,11,16

LCM responds with the following display:

Name: b Ports: 7, 11, 16 Info: All

Port 16 has been assigned to a segment that includes nodes that belong to workgroup A and workgroup B. Port 13 connects workgroup A to the router and port 16 connects workgroup B to the router.

In the above example, both displays show that all broadcasts will remain with the workgroup.

Use the LCM command, workgroup, to create, modify, and delete virtual workgroups. The full syntax of the command is as follows:

workgroup [NAME [{delete | PORT-RANGE [INFO]}]]

To display all of the workgroups deﬁned by the ELS100-16TX, at the LCM prompt:

1. Type

workgroup

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To display information about a speciﬁc workgroup, at the LCM prompt:

1. Type

workgroup NAME

To create or modify a workgroup, at the LCM prompt:

1. Type workgroup NAME PORT-RANGE INFO

To delete a workgroup, at the LCM prompt:

1. Type workgroup NAME delete

To create or modify the port list for a speciﬁc workgroup, at the LCM prompt:

1. Type

workgroup NAME PORT-RANGE

To display the network classiﬁcation of a speciﬁc workgroup, at the LCM prompt:

1. Type

workgroup NAME INFO

3.12 ASSIGNING A COMMUNITY NAME

A community name is similar to a password. You use the same steps to assign a new community name or to change an existing community name. You can then enter a community name to perform any you access the device.

SNMP sets. The default passwor d is public the ﬁrst time

To assign a community name, at the LCM prompt:

1. Type community

2. Enter the old community name.

3. If one has not been assigned, public is the default name.

4. Enter the new community name.

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5. LCM prompts you to verify the new community name by retyping it.

6. Retype the new community name.

3.13 CONFIGURING BROADCAST/MULTICAST STORM PROTECTION

The ELS100-16TX provides automatic protection against broadcast/multicast storms. Multicast storms are excessive broadcasts to all ports, typically caused by a malfunctioning device. They can result in severe network performance problems, including causing the network to crash.

To protect against broadcast/multicast storms, you must deﬁne an acceptable rate for multicast trafﬁc across a port. In many ways, this feature is similar to ﬁltering.

Each ELS100-16TX port can be individually conﬁgured for automatic multicast storm protection. You deﬁne what level of multicasts the ELS100-16TX will recognize as a multicast storm by specifying the number of multicast packets that can be transmitted within a given time period.

Note: LCM does not allow you to configure for multicast storm

protection. You must use an SNMP-based NMS. See the documentation that came with your NMS for configuration instructions.

For example, if you conﬁgure ELS100-16TX to transmit onto Port 3 no more than ﬁve multicasts per 60 seconds, any multicasts destined for Port 3 are discarded after the ﬁrst ﬁve multicasts. After 60 seconds have elapsed, another ﬁve multicasts to Port 3 will be allowed. This maintains an effective maximum rate of ﬁve multicast packets per minute.

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The two Management Information Base (MIB) variables for conﬁguring multicast storm protection are:

• kxifTxStormCnt – speciﬁes the maximum number of multicasts that can be broadcast within the given time.

•

kxiTxStormTime – speciﬁes the period of time that the maximum

number of multicasts can be broadcasted.

Refer to the ELS100-16TX Release Notes for a complete listing and description of MIB variables.

3.14 MODIFYING MIB VARIABLES

Speciﬁc instructions for controlling ELS100-16TX operations, modifying parameters, and so on, depend on the NMS you are using. This manual provides instructions for using LCM commands. However, LCM commands do not exist for all conﬁguration options. You may need to modify your conﬁguration using an NMS.

This section provides several common MIB variables you may want to change. Refer to the ELS100-16TX Release Notes for a complete listing and description of MIB variables.

Each variable is ﬁrst described in words, and is then identiﬁed in MIB form, for example,

kxadminGetPass - {kxadmin 3}. The Display

String line shows the range of values that can be used for the given parameter. In each case, the DisplayString is a string of ASCII characters.

3.15 SYSTEM CONTACT

The system contact parameter identiﬁes the contact person who is responsible for operating the ELS100-16TX. Typically, this parameter includes the person’s name, company or division name, and telephone number.

sysContact - {system 4}

DisplayString (SIZE (0..255))

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3.16 SYSTEM NAME

The system name is a name assigned to the ELS100-16TX by the network administrator . By convention, the system name is the fully qualiﬁed domain name. (This name then becomes the LCM prompt.)

sysName - {system 5}

DisplayString (SIZE (0..255))

3.16.1 System Location

The system location identiﬁes the physical location of the ELS10016TX.

sysLocation - {system 6}

DisplayString (SIZE (0..255))

3.16.2 Community Names

The set community name variable (from the Cabletron proprietary MIB), must be initialized with the correct community name passwords.

All requests from any SNMP manager contain a community name ﬁeld. For set requests, the community name must match the set password; otherwise, the request will be rejected by the ELS10016TX. For get requests, the community name must match either the set or the get community name.

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Set Community Name

The set community name variable (kxadminAnyPass) and get community name variable (

kxadminGetPass) must be set to the value

of the community name used by the SNMP manager for performing either set or get operations. A zero length community name means that any community name is acceptable.

kxadminAnyPass - {kxadmin 2}

DisplayString (SIZE (0..24))

kxadminGetPass - {kxadmin 2}

DisplayString (SIZE (0..24))

3.16.3 Aging Parameter

Dynamic (learned) addresses are automatically deleted from the ELS100-16TX Bridge Address Table after a certain length of time. The aging time default is ﬁve minutes, as set by the IEEE 802.1d standard. However, you can change the aging parameter with the MIB variable

dot1dTpAgingTime.

The ELS100-16TX continually compares the actual age of each dynamic address against the age speciﬁed by the dot1dTpAgingTime parameter, and deletes any addresses that are older than the age speciﬁed (or older than ﬁve minutes if you are using the default). Typically, there is no need to set the aging time to a very small number because the ELS100-16TX Bridge Address Table supports 8192 addresses.

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CHAPTER 4

MONITORING AND MANAGING

YOUR ELS100-16TX

Monitoring the ELS100-16TX consists of collecting and analyzing statistics and system status information.

You can use the Select button on the front panel of the ELS10016TX to monitor segment status on any of the Ethernet ports. Refer to Section 2.1 for a description of the segment status options.

Basic management of the ELS100-16TX consists of disabling or enabling Ethernet ports, changing subnet masks, setting the community name for the ELS100-16TX, and changing the baud rate for your Local Console Manager (LCM) connection.

4.1 ELS100-16TX MANAGEMENT TOOLS

LCM is a command-line interface built into the ELS100-16TX that enables you to monitor and manage the ELS100-16TX through the out-of-band RS232C connection attached to any non-intelligent terminal. You can also use one of the following Cabletron Systems Network Management Stations (NMSs), or a standard SNMPbased NMS to manage the ELS100-16TX:

• SPECTRUM

• SPMA

• SPEL

• Any SNMP-based NMS

4.2 ELS100-16TX STATISTICS

The ELS100-16TX gathers statistics that can help you build a comprehensive proﬁle of the network trafﬁc ﬂow between each Local Area Network (LAN) you are connecting, as well as the network trafﬁc ﬂow between each Ethernet port on the ELS10016TX.

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ELS100-16TX statistics are divided into four groups:

• System statistics

• Ethernet port statistics

• Trafﬁc analysis statistics

• SNMP statistics

You can use this information to analyze your overall network performance and to make conﬁguration changes as necessary. For example, Ethernet port statistics can help you identify network devices that require high bandwidth, and therefore should be connected through a dedicated, rather than a shared, network connection. In addition, Ethernet port statistics can help you identify a network device that is the source of numerous multicast packets due to a possible malfunction.

4.2.1 Gathering Statistics

For purposes of network management, managed objects must be identiﬁed. Creation of a managed object is achieved by placing its identiﬁer, and a set of management information appropriate to its class, in the Management Information Database (MIB).

Using the MIB variables, you can obtain a detailed analysis of your network by combining statistics for each source network, destination network, and source and destination port. The ELS100-16TX Release Notes contain information on where to ﬁnd the SNMP MIB variables you need to monitor and manage the ELS100-16TX.

4.2.2 System Statistics

For each ELS100-16TX, the following system statistics are available:

• The number of seconds since the ELS100-16TX was last reset.

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• The number of spanning tree topology changes that have occurred since the ELS100-16TX was last reset.

• The time since a topology change was last initiated.

• The physical location of the ELS100-16TX.

• The name and address of the contact person for the ELS10016TX.

• The name of the ELS100-16TX.

• The current number of dynamic (learned) addresses.

Note: To check ELS100-16TX system status using LCM, see Section 4.3.

4.2.3 Ethernet Port Statistics

For each Ethernet port connection on the ELS100-16TX, a number of statistics are available. They can help you analyze both network activity and utilization, and in some cases, indicate faulty equipment or cabling.

Note: All statistics counters are cleared when the ELS100-16TX is reset

or when the LCM

clearstat command is used.

• The number of non-unicast (multicast and broadcast) and unicast packets received from the port.

The following statistics are available with SNMP:

• The number of bytes in the received packets.

• The number of bytes in the packets that were ﬁltered.

• The number of bytes in the packets that were forwarded.

• The total number of packets transmitted to the LAN.

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4.3 USING LCM TO CHECK ELS100-16TX STATUS

The LCM commands that enable you to quickly check on the status of the ELS100-16TX include:

• Status

• Address display

• Ipaddr

• Ident These LCM commands are described in the sections that follow.

4.3.1 Displaying Status

The status command displays the status of the ELS100-16TX and automatically pages through the status of all of the Ethernet ports, pausing at each screen of information.

Note: You can also use the

individual Ethernet ports by typing

status command to display status for

status and specifying a port

number.

At the LCM prompt:

1. Type

status

LCM displays the following type of information.

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Software Currently Running: version xx.xx.xx software, Tue 08/23/94 15:0 Next Bootstrap (1st bank): version xx.xx.xx software Tue 08/23/94 15:03: Power-up test failures: none System Up Time: 2:25:57 Current Number of Learned Addresses: 133 CPU utilization is light.

Port RX Packets TX Packets Collisions Erred Packets

1 2 3 4

. . .

16 0 0 0

Type <CR> to display port 1 status...>

6978

0 0 . . .

1676

0 8 0 0

. . .

1676

If you do not want to view the status of each Ethernet port, use the Ctrl-C keys to return to the LCM prompt.

ELS100-16> status 1

Port 1 Status

0 0 0 . . .

Type <CR> to display port 2 status...>

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If you do not want to view the status of port 2, use the Ctrl-C keys to return to the LCM prompt.

You can view the status for multiple of ports by typing and indicating the range of port numbers, for example

2-6

status

4.3.2 Displaying MAC Addresses

The addresses display command displays all MAC addresses in the ELS100-16TX Bridge Address Table. The display includes:

• The MAC address

• Type of address, including:

- Dynamic (learned)

- Ethernet port (for the MAC address of an Ethernet port)

- BPDU (the MAC address to which all BPDUs are directed)

- Reserved (an address reserved by 802.1d, but not yet

assigned)

- All LANs (addresses reserved by 802.1d for network

management)

• Port number

• Age (in seconds since a packet was last received from that address)

The display automatically pauses with each screen of information. Addresses are displayed in random order; for example, address 02:00:00:00:00:00 may appear after address 04:00:00:00:00:00.

The age will be the time since a packet was last received from that address.

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To display all MAC addresses, at the LCM prompt:

1. Type addresses display any LCM responds with a list of all MAC addresses, their

associated ports, the type, age, and number of frames from and to that address.

Address Type Port 08:00:20:02:3a:44 Learned 3 26

Enter <CR> to continue, Ctrl-C to exit:

If you do not specify

any, only the learned addresses are displayed.

Age(secs)

To display a speciﬁc address, at the LCM prompt:

1. Type

addresses display <MAC-ADDRESS>

For example, if you typed, addresses display

02:04:06:03:2a:43

, LCM would display the following

information:

Address Type Port 02:04:06:03:2a:43 Learned 5

Age(secs)

You can display a range of addresses by using a net mask. This is helpful when determining the status associated with stations containing the same make of Ethernet network interface cards. At the LCM prompt:

1. Type

addresses display <MAC-ADDRESS> <NET-MASK>

For example, to see all addresses that begin with 02:04:06, you would enter:

addresses display 02:04:06:00:00:00 ff:ff:ff:00:00:00

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LCM would display:

Address Type Port 02:04:06:03:2a:43

02:04:06:00:2a:67 02:04:06:a3:70:2b

Enter <CR> to continue, Ctrl-C to exit:

The

ipaddr command displays the IP addresses, subnet masks, and

Learned Learned Learned

5 4 6

Age(secs)

1 0

MAC addresses of all ELS100-16TX ports. At the LCM prompt:

1. Type

ipaddr

LCM displays the current IP address table, for example.

Port

1 2 3 4 5 6 7 8

IP Address

192.138.217.1

0.0.0.0

192.138.217.10

0.0.0.0

192.138.217.20

192.138.217.50

192.138.217.30

Address Mask

255.255.255.0

255.0.0.0

255.255.255.0

255.0.0.0

255.255.255.0

MAC Address

00:40:27:00:06:1f 00:40:27:00:06:c3 00:40:27:00:06:3e 00:40:27:00:03:7a 00:40:27:00:05:c7 00:40:27:00:04:4a 00:40:27:00:06:9e 00:40:27:00:04:b4

4.3.3 Displaying Manufacturing Information

The ident command identiﬁes ELS100-16TX manufacturing information, including the part number and any power-up test codes and diagnostic data. To display the manufacturing information, at the LCM prompt:

1. Type

ident

LCM displays the following type of information:

Part Number: Up-Link Module Part Number: 123-4567-891 X1234567-1234567 Power-up test codes: Diagnostic data:

4-8

501-3000-002

X70002e4-0006891

00000000 00000000 00000000 00000000

00000000 00000000 fffffffc fffffffc 00000000 00000000 ff006000 00000000

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Monitoring and Managing Your ELS100-16TX

4.4 MANAGING THE ELS100-16TX

Managing the ELS100-16TX consists of:

• Disabling and enabling Ethernet ports

• Changing a subnet mask

• Changing a community name

• Setting the baud rate of your terminal connection

• Setting a reboot time You can use the Local Console Manager (LCM), any of the

Cabletron Systems NMSs, or a standard SNMP-based NMS to manage the ELS100-16TX. Refer to Section 4.1.

4.5 USING LCM TO MANAGE THE ELS100-16TX

The LCM commands that enable you to manage the ELS100-16TX include:

• Disable

• Enable

• Ipaddr

• Community

• Baud

• Reboot These LCM commands are described in the sections that follow.

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4.5.1 Disabling a Port

There can be times when you need to disable a speciﬁc Ethernet port, for example, after you have determined that there is faulty equipment. Disabling a port effectively stops all bridging functions for that port. Disabled ports do not accept SNMP packets, and therefore cannot communicate with an NMS.

To disable a port, or port range, at the LCM prompt:

1. Type

disable <PORT-RANGE>

For example, disable 7-9 would disable ports 7, 8, and 9. LCM responds:

Port 7: Disabled Port 8: Disabled Port 9: Disabled

Once an Ethernet port is disabled, it will be disabled until you enable it again. Resetting the ELS100-16TX will not enable a port that has been disabled.

Caution: If you disable the port through which someone is remotely

managing the ELS100-16TX, that person will not be able to communicate with the ELS100-16TX. Use the LCM command addresses display to find the port number you are using to manage the ELS100-16TX.

4.5.2 Enabling a Port

When you enable an Ethernet port that has been disabled, whatever bridging functions you had previously conﬁgured for that port are re-enabled.

To enable a port, or a range of ports, at the LCM prompt:

1. Type

4-10

enable <PORT-RANGE>

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For example, enable 7-9 would enable ports 7, 8, and 9. LCM responds:

Port 7: Enabled, Rip listening Port 8: Enabled, Rip listening Port 9: Enabled, Rip listening

Note:

Rip listening

means that the ELS100-16TX is in listening

mode only. No RIP packets are created.

noRIP Option

The Routing Information Protocol (RIP) is one of the protocols that allows the ELS100-16TX to build an accurate, current routing table. This table includes the networks it knows about, the next hop, and the number of hops to get there. RIP enables you to use an NMS to remotely manage the ELS100-16TX through a router.

The noRIP option allows you to turn off the routing information that builds the routing table. You would use this option when you are connecting network devices that do not support RIP.

4.5.3 Changing a Subnet Mask

You can optionally set the subnet mask for a port. A subnet mask is a 32-bit address mask used in IP to specify a particular subnet. If the subnet mask is 0.0.0.0, the ELS100-16TX automatically converts the displayed mask to the standard default, based on the port’s IP address class. (Class A address masks are 255.0.0.0, Class B address masks are 255.255.0.0, Class C address masks are 255.255.255.0.)

To display IP addresses, subnet masks, and MAC addresses of all ports on the ELS100-16TX you are managing, at the LCM prompt:

1. Type

ipaddr

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LCM displays the current IP address table, for example:

Port IP Address Address Mask MAC Address

192.138.217.1

0.0.0.0

192.138.217.10

0.0.0.0

192.138.217.20

192.138.217.50

255.255.255.0

255.0.0.0

255.255.255.0

255.0.0.0

255.255.255.0

00:40:27:00:06:1f 00:40:27:00:06:c3 00:40:27:00:06:3e 00:40:27:00:03:7a 00:40:27:00:05:c7 00:40:27:00:04:4a 00:40:27:00:06:9e

To change the subnet mask, at the LCM prompt:

1. Type ipaddr <PORT-NUMBER> <IP ADDRESS> <SUBNET MASK> For example, ipaddr 6 192.138.217.40 255.255.240.0 would set

the subnet mask for port 6 to 255.255.240.0. LCM responds by redisplaying the address table.

Note: When you change the subnet mask for a port, you must also enter

the IP address for that port. Make sure you enter the IP address for the port correctly; whatever you enter becomes the IP address.

To assign a new IP address, refer to Section 3.1.

4.5.4 Changing a Community Name

A community name is similar to a password. You use the same steps to assign a new community name or to change an existing community name. This sets the MIB variable can then enter a community name to perform any

To assign a community name, at the LCM prompt:

1. Type

community

2. Enter the old community name. If one has not been assigned, you do not need to enter

anything. LCM prompts you for the new community name.

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sxadminAnyPass. You

SNMP sets.

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Monitoring and Managing Your ELS100-16TX

3. Enter the new community name. LCM prompts you to verify the new community name by

retyping it.

4. Retype the new community name.

4.5.5 Setting the Baud Rate

You can set the baud rate for your LCM console connection. The options for baud rate include:

• 1200

• 2400

• 4800

• 9600

• 19200 The default rate is 9600.

Note: Make sure that the baud rate you set matches the baud rate setting

for the terminal you are using.

To display the current baud rate setting, at the LCM prompt:

1. Type

baud

LCM responds:

Usage: baud [1200|2400|4800|9600|19200]

Baud rate is 4800.

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To change the baud rate setting, at the LCM prompt:

1. Type baud <baud rate> For example, baud 9600 would set the baud rate to 9600. LCM responds:

Baud rate is 9600.

4.5.6 Setting a Reboot Time

Y ou can enter the number of seconds the ELS100-16TX waits befor e rebooting. At the LCM prompt:

1. Type

reboot <time interval>

For example, reboot 60 LCM responds:

Reboot pending in 59 seconds.

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CHAPTER 5

ELS100-16TX DIAGNOSTICS AND TROUBLESHOOTING

The ELS100-16TX incorporates built-in diagnostic and testing capabilities which are convenient to use and cause minimal or no disruption to the rest of the operational network. These capabilities are effective for isolating problems within the ELS100-16TX unit. Built-in diagnostic capabilities include:

• System-wide power-up diagnostics, which are run every time the system is powered up or reset.

5.1 POWER-UP DIAGNOSTICS

The ELS100-16TX performs an extensive set of diagnostic self-tests whenever any of the following events occur:

• Power-up

• Reset using the front panel Reset button (a hard reset)

• Reset via the NMS (a soft reset)

• Automatic reset in response to a non-recoverable failure

The power-up diagnostics test processors, memory, and other critical hardware components of the ELS100-16TX. All diagnostic software is stored in non-volatile memory.

5.1.1 Power-up LED Sequence

When you power-up the ELS100-16TX, the following occurs:

1. The Power (Pwr) LED is on.

2. The CPU LED starts ﬂashing. Two of the Port Status Mode LEDs are on.

3. After several seconds, the CPU LED will stay on and only one Port Status LED is lit. This indicates the power-up diagnostics sequence is complete.

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ELS100-16TX Diagnostics and Troubleshooting

Note: If a critical component fails diagnostics, the CPU LED will turn off

and the ELS100-16TX will attempt to reboot. If the CPU LED does not stay on, contact Cabletron Systems Global Call Center. Refer to Section 1.2.

5.1.2 Speciﬁc Power-up Tests

The power-up diagnostic tests performed on the ELS100-16TX include:

• ROM checksum test

• Instruction/Data memory test

• FLASH checksum test

• NVRAM checksum test

5.1.3 Software Checksum Comparison

When the ELS100-16TX reboots, its operational software is veriﬁed by a checksum comparison before it is loaded. If the software fails the checksum test due to an interrupted new software distribution procedure, the ELS100-16TX will automatically use its backup version of software. A backup version of software is always stored in non-volatile memory.

The operational parameters of the ELS100-16TX software are also protected by a checksum comparison. When the ELS100-16TX reboots, if the operational parameters of the ELS100-16TX fail a checksum test due to a power failure in the midst of a previous update, the ELS100-16TX automatically uses its backup version of the parameters.

Note: A backup version of the operational parameters is always stored in

non-volatile memory before any update is attempted.

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5.1.4 Power-up Diagnostics Results

After completion of the power-up diagnostic sequence, both the Power (Pwr) and CPU LEDs located on the front panel of the ELS100-16TX should be on.

5.2 RESPONSES TO FAILURES AT POWER-UP

How the ELS100-16TX responds to failures detected during powerup depends on the seriousness of the failure. For example, it will operate if a non-critical component, such as the out-of-band management port, fails diagnostics. However, in the event of a critical failure, such as a failure of the main element processor, the ELS100-16TX will halt execution and will not boot to operational mode.

5.3 STATUS AND ACTIVITY INDICATORS

The front panel of the ELS100-16TX includes LEDs that indicate the status or activity of various system components. Figure 5-1 shows the ELS100-16TX front panel LEDs and buttons. The LEDs and buttons are described in Tables 5-1 and 5-2.

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ELS100-16TX Diagnostics and Troubleshooting

Port Link LEDs

(upper row)

Segment Status LEDs

9X 11X 13X 15X

10X 12X 14X 16X

ELS100-16TX

PORT STATUS MODE

STATUS

TX ACT FDX MON

PWR

CPU

RESET

COM

RX COL 100 USR

LINK

STATUS

LINK

STATUS

13579111315

2 4 6 8 10 12 14 16

Power and

CPU LEDs

Port Status LEDs

(lower row)

Segment Status Option Select Button

1X 3X 5X 7X

2X 4X 6X 8x

EPIM100

5-4

Figure 5-1. ELS100-16TX Front Panel LEDs

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ELS100-16TX Diagnostics and Troubleshooting

Table 5-1. Meaning of ELS100-16TX LEDs

LED State Meaning

Port Status Mode TX

Indicates port is transmitting a packet.

ACT

COL

FDX

On Off

100

On Off

MON

On Blink

USR

Link (Individual Ports)

Status (Individual Ports)

On Off

On/ Blink

CPU On

Off

Indicates port is receiving a packet.

Indicates port is transmitting or receiving. Indicates a collision on a port.

Indicates the link is good. Indicates there is no link.

Indicates you are monitoring the port for a selected segment status condition. This LED always indicates the selected status mode.

Indicates the ELS100-16TX is operational. Blinking – Indicates the ELS100-16TX is running power-up diagnostics. Indicates the ELS100-16TX is nonoperational.

Pwr On

Off

On – Indicates the ELS100-16TX is receiving power and the voltage is within the acceptable range. Indicates the ELS100-16TX is not receiving power.

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Table 5-2 describes the ELS100-16TX buttons.

Table 5-2 Description of ELS100-16TX Buttons

Button Function

Status Cycles through the Segment Status options (TX, RX, Act,

Col, and Usr) for all ports. The lower port status LEDs of the ports you are monitoring are activated based on what function you chose with the Select button.

Reset Restarts the ELS100-16TX.

5.4 TROUBLESHOOTING

This section lists several situations that could happen while using the ELS100-16TX, and suggests appropriate action. Because every situation is potentially unique, the corrective actions suggested here should be considered as guidelines only.

5.5 ELS100-16TX DOES NOT POWER UP

If your ELS100-16TX does not power up, check each one of the following:

• Make sure the power source is operational.

• Make sure the power cord is securely connected. If the ELS100-16TX still does not power up, contact Cabletron

Systems Global Call Center. Refer to Section 1.2 for more information.

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ELS100-16TX Diagnostics and Troubleshooting

5.5.1 Connectivity Problems

• Check for LED abnormalities.

• Check port status using LCM.

• Check for loose port connections.

• Check to see if the number of carrier losses is increasing using LCM. This indicates that the connection is suspect.

• Check to see if the number of total collisions has dramatically increased using LCM.

5.5.2 ELS100-16TX Has Rebooted

• Use the LCM ident command to check the ELS100-16TX diagnostic codes. W rite down these codes exactly as they appear and call your authorized Cabletron Systems representative.

5.5.3 ELS100-16TX Does Not Respond to NMS

• Check the port status using LCM.

• Check to see if the Spanning Tree topology is stable using LCM.

• Check that a pathway to the ELS100-16TX exists.

• Verify the ELS100-16TX IP address using LCM.

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ELS100-16TX Diagnostics and Troubleshooting

5-8

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APPENDIX A

TECHNICAL SPECIFICATIONS

A.1 ELS100-16TX SPECIFICATIONS

Physical

Height 2.55 in (6.48 cm) Width 17 in (43.18 cm) Depth 15.5 in (39.4 cm) Weight 9 lb (4.1 kg)

Electrical

Input voltage Auto-ranging from 100–120,

200–240 Vac Frequency 50/60 Hz AC power consumption 80 watts

Connector Ports

16 RJ45 Ethernet ports (MDI-X) 1 RS232C port for Local Console Manager (LCM) 2 slots for optional Ethernet Port Interface Module

Environmental

Operating temperature 5° to 40° C (41° to 104° F) Storage temperature -30° to 73° C (-22 ° to 164° F) Operating relative humidity 5% to 90% (non-condensing)

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Technical Speciﬁcations

Diagnostic LEDs

Individual port link status Individual port segment status Segment status, specifying one of the following:

- Transmit activity

- Receive activity

- Both Transmit and Receive activity

- Collision

- 100 (Mbps)

- Duplex

- MON (monitor)

- User-deﬁned

CPU Power (PWR)

Standard Support

• IEEE 802.1 Part D

• IEEE802.2 (Logical Link Control)

• IEEE 802.3 (CSMA/CD, 10BASE-T) Ethernet

• Transparent Bridging with Spanning Tree

• Ethernet Version 2

• EIA RS232C (DTE-to-DCE Interface Speciﬁcation)

• EIA RS-310-C (Rack-mount Speciﬁcation)

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Technical Speciﬁcations

Address T able Size

8,192 dynamic entries

Management Support

• MIB II, 802.1d, 802.3, and Cabletron Enterprise MIB

• Cabletron Systems Local Console Manager (LCM)

• Any SNMP-based network management system

Regulatory Compliance

Safety UL 1950, CSA C22.2 No. 950,

EN 60950, IEC 950 and 73/23/EEC

Electromagnetic Compatibility FCC Part 15, EN 55022,

EN 50082-1, 89/336/EEC, CSA C108.8, VCCI V-3

A.2 SERIAL CABLE PIN ASSIGNMENTS

For a PC running a Windows terminal connected to the RS232C Network Management Port on the front panel of the ELS100-16TX, the following serial cable pin assignments (Tables A-1 and A-2) are required to manage the ELS100-16TX using the Local Console Manager (LCM).

Table A-1. DB25 Pin Assignments

ELS100-16TX RJ45 (female) DB25-pin (female)

Pin 1 (Tx) Pin 3 Pin 4 (Rx) Pin 2 Pin 5 (GND) Pin 7

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Technical Speciﬁcations

Table A-2. DB9 Pin Assignments

ELS100-16TX RJ45 (female) DB9 pin (female)

Pin 1 (Rx) Pin 2 Pin 4 (Tx) Pin 3 Pin 5 (GND) Pin 5

A.3 100BASE-T PIN ASSIGNMENTS

An Ethernet twisted-pair link segment requires two pairs of wires. Each wire pair is identiﬁed by solid and striped colored wires. For example, one wire in the pair might be red and the other wire, red with white stripes.

Connectors

Refer to the diagram below and note how the pins are numbered. Be sure to hold the connectors in the same orientation when connecting the wires to the pins.

Figure A-1. Connector Pin Numbers

Each twisted-pair link segment must have a male connector attached to both ends. According to the 100BASE-T speciﬁcation, pins 1 and 2 on the connector are used for receiving data; pins 3 and 6 are used for transmitting data, as shown in Table A-3.

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Technical Speciﬁcations

Table A-3. 100BASE-T Pin Assignments

Pin Assignment

1 Rx+ 2 Rx3 Tx+ 6 Tx-

a. The “+” and “-” signs are used to represent the polarity of the two wires that make up each wire pair.

A.4 STRAIGHT-THROUGH WIRING

If the twisted-pair link segment is to join two ports on a switch, and only one of the ports has an internal crossover , the two pairs of wires must be straight-through, as shown in Table A-4.

Table A-4. Straight-Through RJ45 Pin Assignments

ELS100-16TX (Crossed) Device (Not Crossed)

1 (Rx+) 1 (Tx+) 2 (Rx-) 2 (Tx-) 3 (Tx+) 3 (Rx+) 6 (Tx-) 6 (Rx-)

A.5 CROSSOVER WIRING

T wo ELS100-16TXs can communicate only if the transmitter on one unit is connected to the receiver on the other unit. This reversal, or crossover function, can be implemented either in the wiring or in the device itself. When connecting ELS100-16TXs, a crossover must be implemented in the wiring. Refer to Table A-5 for crossover pin assignments.

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Technical Speciﬁcations

Table A-5. Crossover RJ45 Pin Assignments

ELS100-16TX ELS100-16TX

1 (Rx+) 3 (Tx+) 2 (Rx-) 6 (Tx-) 3 (Tx+) 1 (Rx+) 6 (Tx-) 2 (Rx-)

A.6 THE 5 - 4 - 3 RULE

Between any two nodes (i.e., PCs or other stations) on the network, there can be:

• Up to ﬁve segments in series

• Up to four repeaters or multi-port hubs

• Up to three populated segments (that is, segments attached to two or more PCs). The remaining two segments are unpopulated; these are known as inter-repeater links or IRLs. This distinction between populated and unpopulated segments is signiﬁcant for coax networks only.

Note: This rule is completely consistent with the IEEE 802.3

specification, and is meant only to summarize the configuration specification.

A.7 EPIM-100FX SPECIFICATIONS

The ELS100-16TX uses a Ethernet Port Interface Module (EPIM) to provide front panel cable connections. FEPIMs are user -installable. See Section 2.2, Installing an EPIM.

The EPIM-100FX shown in Figure A-2 supports Multimode Fiber Optic cabling. The EPIM-100FX is equipped with an SC style connector.

A-6

Page 97

9X 11X 13X 15X

Technical Speciﬁcations

EPIM100

LNK

EPIM-100FX

10X 12X 14X 16X

EPIM100

LNK

EPIM-100FX

Figure A-2. EPIM-100FX

Speciﬁcations for the EPIM-100FX are listed in Table A-6. The transmitter power levels and receive sensitivity levels listed are peak power levels after optical overshoot. A peak power meter must be used to correctly compare the values given above to those measured on any particular port. If power levels are being measured with an average power meter, add 3 dBm to the measurement to compare the measured values to the values listed below.

Table A-6. Transmitter Power

Cable T ype Worst Case Budget Typical Budget

50/125 µm ﬁber 6.0 dB 9.0 dB

62.5/125 µm ﬁber 9.0 dB 12.0 dB 100/140 µm ﬁber 15.0 dB 18.0 dB

A-7

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Technical Speciﬁcations

A-8

Page 99

APPENDIX B

GLOSSARY

address

A set of characters that uniquely identiﬁes a station, peripheral device, node, or other unit in a network.

address table

A database of device addresses and their associated ports maintained by a switch or bridge for use in making data packet forwarding and ﬁltering decisions.

agent

Network management software that runs within a managed network device.

alarm

See trap.

ANSI

American National Standards Institute – One of several organizations that establishes standards that apply to internetworking.

ARP

Address Resolution Protocol – An auxiliary pr otocol of the IP layer used to perform dynamic address translation between MAC addresses and internet addresses. Binds IP addresses to speciﬁc MAC addresses.

attenuation

The amount of power (or light) lost as power travels through a medium from the transmitter to the receiver. Difference between transmitted and received power, in decibels (dB).

AUI (attachment unit interface)

A standard connector type used for Ethernet connections.

B-1

Page 100

Glossary

backbone

The major, central transmission path for a network. A backbone usually handles high-volume, high-density trafﬁc. Typically a backbone connects various LANs into an integrated network.

bandwidth

A measure of the amount of trafﬁc a given medium can handle at one time: The communications capacity (measured in bits per second), of a transmission line or of a speciﬁc path through a network. Greater bandwidth generally means more information can be sent through a circuit during any given period of time.

BPDU (bridge protocol data unit)

A data unit transmitted as part of the IEEE 802.1d Spanning Tree Protocol. The exchange of BPDUs allows bridges within a network to logically conﬁgure the network as a single spanning tree.

bps (bits per second)

The basic unit of data communications rate measurement.

bridge

An intelligent, protocol independent device used to connect similar or dissimilar LANs.

bursty

Adjective used to describe sporadic heavy volumes of network trafﬁc (e.g., bursty trafﬁc).

bypass

Optical or electronic isolation of a station from the network. A bypass situation typically occurs as a result of a station failure or shutdown; the bypass allows the network to function normally, except for the absence of the missing station.

concentrator

A device that provides attachment points for stations that are not connected to the ELS100-16TX. The concentrator is connected directly to the network; the stations connect to the concentrator.

B-2

Cabletron Systems 100 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

NOTICE

CONTENTS

INTRODUCTION

1.1 ABOUT THIS MANUAL

1.2 GETTING HELP

1.3 DOCUMENT CONVENTIONS

1.4 RELATED DOCUMENTATION

1.5 OVERVIEW

Port T runking

Autonegotiation

Store and Forward Switching

Spanning T ree Algorithm

Virtual Workgr oups

1.6 LOCAL CONSOLE MANAGER

1.6.1 Command Syntax Conventions

1.6.2 Basic LCM Commands

Help

Erase

Exit or Logout

Traplog

2.1 ELS100-16TX FRONT PANEL

2.2 INSTALLING AN EPIM

2.3 INSTALLING THE ELS100-16TX

Rack-Mounting an ELS100-16TX

2.5 CONNECTING THE LOCAL CONSOLE MANAGER

2.6 CONNECTING TO THE NETWORK

2.6.1 Connecting UTP Cables

2.6.2 Connecting a Segment to the EPIM-100FX

Fiber Optic Network Connection

CONFIGURING Y OUR ELS100-16TX

3.1 ASSIGNING IP ADDRESSES

3.1.1 Displaying IP Addresses

3.1.2 Deleting an IP Address

3.1.3 Changing a Subnet Mask

3.2 ENABLING BRIDGING

3.3 DISABLING BRIDGING

3.4 DISPLAYING BRIDGING FUNCTIONS

3.5 ENABLING TRUNKING

Trunk Groups

3.6 DISABLING TRUNKING

3.7 DISPLAYING TRUNKING STATUS

3.8 ENABLING PORT MIRRORING

3.9 DISABLING MIRRORING

3.10 DISPLAYING MIRRORING STATUS

3.11 DEFINING AND DELETING WORKGROUPS

3.12 ASSIGNING A COMMUNITY NAME

3.14 MODIFYING MIB VARIABLES

3.15 SYSTEM CONTACT

3.16 SYSTEM NAME

3.16.1 System Location

3.16.2 Community Names

Set Community Name

3.16.3 Aging Parameter

4.1 ELS100-16TX MANAGEMENT TOOLS

4.2 ELS100-16TX STATISTICS

4.2.1 Gathering Statistics

4.2.2 System Statistics

4.2.3 Ethernet Port Statistics

4.3 USING LCM TO CHECK ELS100-16TX STATUS

4.3.1 Displaying Status

4.3.2 Displaying MAC Addresses

4.3.3 Displaying Manufacturing Information

4.4 MANAGING THE ELS100-16TX

4.5 USING LCM TO MANAGE THE ELS100-16TX

4.5.1 Disabling a Port

4.5.2 Enabling a Port

noRIP Option

4.5.3 Changing a Subnet Mask

4.5.4 Changing a Community Name

4.5.5 Setting the Baud Rate

4.5.6 Setting a Reboot Time

ELS100-16TX DIAGNOSTICS AND TROUBLESHOOTING

5.1 POWER-UP DIAGNOSTICS

5.1.1 Power-up LED Sequence

5.1.3 Software Checksum Comparison

5.1.4 Power-up Diagnostics Results