Cabletron Systems SmartSTACK ELS100-24TXM User guide

Below you will find brief information for SmartSTACK 100 ELS100-24TXM Ethernet Switch. This guide provides comprehensive details on the features, installation, configuration, and monitoring of this high-performance Ethernet switch. It covers aspects from physical mounting and port connections to advanced network management capabilities like VLANs, Spanning Tree Protocol, RMON, and Class of Service, ensuring efficient setup and operation in various network environments, including client/server and local backbone applications.

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SmartSTACK 100

ELS100-24TXM

ETHERNET SWITCH

INSTALLATION

AND

USER GUIDE

Only qualified personnel should perform installation procedures.

NOTICE

Cabletron Systems reserves the right to make changes in specifications and other information contained in this document without prior notice. The reader should in all cases consult

Cabletron Systems to determine whether any such changes have been made.

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

IN NO EVENT SHALL CABLETRON SYSTEMS BE LIABLE FOR ANY INCIDENTAL, INDI-

RECT, 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 AD-

VISED OF, KNOWN, OR SHOULD HAVE KNOWN, THE POSSIBILITY OF SUCH DAMAG-

ES.

Printed in the United States of America

Part Number: 9032785 September 1998

ELS100-24TX is a trademark of Cabletron Systems, Inc.

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

FCC NOTICE

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

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

WARNING: Changes or modifications made to this device which are not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment.

Printed on Recycled Paper

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

This document is an agreement between you, the end user, and Cabletron Systems, Inc.

(“Cabletron”) that sets 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 AGREE-

ING 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, PROMPTLY RETURN

THE UNUSED PRODUCT TO THE PLACE OF PURCHASE FOR A FULL REFUND.

CABLETRON SOFTWARE PROGRAM LICENSE

1. LICENSE. You have the right to use only the one (1) copy of the Program provided in this package subject to the terms and conditions of this License Agreement.

You may not copy, reproduce or transmit any part of the Program except as permitted by the Copyright Act of the United States or as authorized in writing by

Cabletron.

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

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.

EXCLUSION OF WARRANTY

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

CABLETRON DISCLAIMS ALL WARRANTIES, OTHER THAN THOSE SUP-

PLIED TO YOU BY CABLETRON IN WRITING, EITHER EXPRESSED OR IM-

PLIED, INCLUDING BUT NOT LIMITED TO IMPLIED WARRANTIES OF

MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, WITH RE-

SPECT TO THE PROGRAM, THE ACCOMPANYING WRITTEN MATERIALS,

AND ANY ACCOMPANYING HARDWARE.

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

CABLETRON OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSO-

EVER (INCLUDING, WITHOUT LIMITATION, DAMAGES FOR LOSS OF BUSI-

NESS, 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 AD-

VISED OF THE POSSIBILITY OF SUCH DAMAGES. BECAUSE SOME STATES

DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CON-

SEQUENTIAL OR INCIDENTAL DAMAGES, OR ON THE DURATION OR LIMI-

TATION OF IMPLIED WARRANTIES, IN SOME INSTANCES THE ABOVE

LIMITATIONS AND EXCLUSIONS MAY NOT APPLY TO YOU.

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.

SAFETY INFORMATION

LASER RADIATION AND CONNECTORS

When the connector is in place, all laser radiation remains within the fiber. The maximum amount of radiant power exiting the fiber (under normal conditions) is -12.6 dBm or 55 x 10 -

6 watts. Removing the optical connector from the transceiver allows laser radiation to emit directly from the optical port. The maximum radiance from the optical port (under worst case conditions) is 0.8 W cm -2 or 8 x 10 3 W m

2 sr

-1

Do not use optical instruments to view the laser output. The use of optical instruments to view laser output increases eye hazard. When viewing the output optical port, power must be removed from the network adapter.

DECLARATION OF CONFORMITY

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

73/23/EEC

Manufacturer’s Name: Cabletron Systems, Inc.

Manufacturer’s Address:

European Representative Name:

European Representative Address:

Conformance to Directive(s)/

Product Standards:

Equipment Type/Environment:

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 Industrial Environment.

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

Manufacturer Legal Representative in Europe

Mr. Ronald Fotino Mr. J. Solari

Principal Compliance Engineer

Title

Rochester, NH, USA

Location

Managing Director - E.M.E.A.

Title

Newbury, Berkshire, England

Location

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

Frame Buffering and Frame Latency . . . . . . . . . . . . . . . . . . . . . . . . 7

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

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

Configuration and Management Interfaces . . . . . . . . . . . . . . . . . . . 8

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

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

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

Broadcast Throttling. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

Connecting a Terminal to the Console Port . . . . . . . . . . . . . . . . . . . . . 20

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

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

ELS100-24TXM Table of Contents i

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

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

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

10Base-T/100Base-TX Ports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

100Base-FX Fiber Ports. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

Download Software Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

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

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

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

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

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

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

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

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

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

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

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

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

Configuring Port Mirroring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59 ii Table of Contents ELS100-24TXM

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

Downloading Via the Serial Port . . . . . . . . . . . . . . . . . . . . . . . . . . 60

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

RFC 1757 (RMON MIB). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69

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

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

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

General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81

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

Spanning Tree Protocol in a Network . . . . . . . . . . . . . . . . . . . . . . . . . . 82

Spanning Tree Protocol Parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . 83

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

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

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

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

ELS100-24TXM Table of Contents iii

Handling Duplicate Paths . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84

Remapping Network Topology . . . . . . . . . . . . . . . . . . . . . . . . . . . 84

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

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

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

ELS100-24TXM VLAN Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . 90

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

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

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

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

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

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

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

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

INDEX. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Index 99 iv Table of Contents ELS100-24TXM

PREFACE

Purpose

This guide provides information about the features and applications of the

Cabletron Systems ELS100-24TXM switch as well as instructions for configuring and monitoring the switch.

Audience

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

• Working knowledge of Ethernet LANs

• Familiarity with Transmission Control Protocol/Internet Protocol

(TCP/IP) and Simple Network Management Protocol (SNMP)

Conventions

This section describes the conventions used in this guide.

Message Formats

Two types of messages, identified by icons, appear in the text:

A note informs you of special circumstances.

A caution indicates the possibility of equipment damage.

9032785 Preface i

Keyboard Entries

This guide uses the following conventions for keyboard entries:

• When you read “enter,” type the text and press the [Enter] key.

• Example: Enter the Gateway IP address and press the [Enter] key.

• When you read “select,” type the letter associated with the parameter.

Example: Select a from the System Configuration Menu to view the

SNMP Configuration Menu.

Other Conventions

This guide uses the following typographical conventions:

• Initial Caps Menu titles and console menu selections

• [Enter]

• ALL CAPS

Used to designate the Enter or Return key.

Used to designate fields within the console menus.

(Example: CONNECTION)

• courier font Screen messages and user prompts.

• Selection Describes a user-configurable user interface item.

• Field Describes a read-only information item

Organization

Chapter 1. Product Overview: Describes the features of the switch, front and rear panel components and application examples.

Chapter 2. Installation: Describes the content of your switch shipment, lists site requirements, and provides mounting instructions. Instructions for making connections and powering up the switch are provided as well.

Chapter 3. ELS100-24TXM User Interface: Describes the user interface console menus and lists the factory defaults for system settings. Each of the console menus are presented along with a description of the selections/fields available within each menu.

Chapter 4. Configuring and Monitoring the Switch: Describes common tasks and associated steps required to configure the switch, and covers common switch and network considerations required to ensure system integrity.

Chapter 5. SNMP Management: Describes how the Simple Network

Management Protocol (SNMP) communication protocol is used to manage the switch, and provides a description of industry standard and proprietary Managed Information Bases (MIBs) supported by the switch.

ii Preface ELS100-24TXM

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

Appendix B. Spanning Tree Concepts: Describes the operation of the

Spanning Tree Protocol and how it is used to resolve the problems of physical loops in a network.

Appendix C. Flow Control: Describes how the flow control features are used to provide a mechanism for protecting the switch from overload conditions and to keep additional traffic off the network.

Appendix D. Virtual LANs (VLANs): Describes how the switch uses

VLANs to create isolated network domains, and provides illustrations of

VLAN switch configurations.

Appendix E. Class of Service: Describes how the traffic Class of Service features can be used to assign mission-critical data a higher priority through the switch by delaying less critical traffic during periods of congestion.

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

9032785 Preface iii

1. PRODUCT OVERVIEW

Description

This installation and user guide describes the Cabletron Systems

ELS100-24TXM Ethernet switch. The switch is IEEE 802.1D-compliant and supports 24 IEEE 802.3u 100Base-TX Fast Ethernet ports. Each port can alternatively operate as an IEEE 802.3i 10Base-T port. In addition, two of the switch’s ports support Fast Ethernet over fiber (IEEE 802.3u

100Base-FX) when a modular daughtercard is installed.

The Cabletron ELS100-24TXM switch automatically learns end-station addresses from the network and stores them in a Media Access Control

(MAC) address forwarding table. Incoming packets are then forwarded to the appropriate output port based on the addresses in the packet. Each port on the switch operates at full Fast Ethernet wire speed with full address and frame filtering.

The Cabletron ELS100-24TXM switch contains advanced features such as Remote Monitoring (RMON), IEEE 802.1Q virtual LANs (VLANs),

IEEE 802.1p Class of Service, flow control and broadcast throttling. For network management, the ELS100-24TXM switch includes a standardscompliant Simple Network Management Protocol (SNMP) agent. This agent allows network management station applications to collect and present status and performance information about a switch as well as providing the ability to configure and control functions on the device.

Network management can also be performed in-band using the popular

TCP/IP application, Telnet. In addition, a serial console port allows out-ofband management using a PC or an ASCII terminal. The ELS100-24TXM switch is desktop or rack-mountable. LEDs on the front panel provide information about the operating status of the switch. The back panel of the switch contains the power connector and a power switch. Two fans maintain ventilation and cooling for internal switch components.

This chapter provides the following information:

• Product Description

• Features

• Front and Rear Panel Component Descriptions

• Feature Summaries

• Application Examples

9032785 Product Overview 1

Features

• Ports:

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

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

• Architecture:

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

- 4.2 Gbps internal switching fabric

- 12 MB packet buffering (512 KB/port)

- 4096 MAC address forwarding table per port; up to 12,288 addresses per system

- IEEE 802.3u auto-negotiation for full/half duplex and 10/100

Mbps speed operation on all RJ-45 ports

- High performance store-and-forward switching

• Performance:

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

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

• Traffic Management:

- Tag and port-based VLANs per the IEEE 802.1Q draft standard - 4094 VLAN IDs recognized per switch

- Class of Service support per the IEEE 802.1p draft standard

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

- Broadcast throttling for broadcast storm control

• Network Management:

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

1493); Ethernet MIB (RFC 1398); RMON - Statistics, History,

Alarm and Event groups per port (RFC 1757); private MIB extensions

- Port mirroring for network monitoring and analysis

- Telnet

- Console port, RS-232, female DB-9 connector, null modem

- BootP/DHCP for IP address configuration

• LED Indicators

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

Speed, Full Duplex

- 100Base-FX Ethernet ports: Link and Activity

- System: Power, Test

• Software:

- Extensive diagnostics for product testing and troubleshooting

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

TFTP

2 Product Overview ELS100-24TXM

Front Panel

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

Figure 1-1. ELS100-24TXM Front Panel

Table 1-1. Front Panel Components

Name

100Base-FX Fiber ports

(Ports 1 and 2)*

Function

Fiber ports using SC fiber connectors for fiber uplink modules (see Table 2-3 for a list of available uplink modules).

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

Fiber Ports 1 and 2

LEDs*

10Base-T/100Base-TX

RJ-45 ports (Ports 1-24)*

Ports 1-24 RJ-45 LEDs*

LED mode button

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

Indicates Link, Activity, Speed and Duplex information

(see Table 1-2 for details).

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

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

Power LED

Test LED

Lights steady green to indicate power is supplied to the switch. Off indicates no power is supplied to the switch.

Lights steady green after a reset and remains on until successful completion of power-on self tests. Off indicates a successful completion of the power-on self tests.

Console port Female DB-9 connector configured as a null modem connection for serial out-of-band management using the console menus.

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

Ports 1 and 2 RJ-45 connectors then become disabled.

9032785 Product Overview 3

Figure 1-2 shows the Link and Activity LEDs for the 2 100Base-FX ports

(fiber port LED functions are defined in Table 1-2). The LEDs are positioned to the left of their associated port.

Link LEDs

Activity LEDs

Figure 1-2. 100Base-FX Port LEDs

Figure 1-3 shows the Link and Activity port LEDs for 24 10Base-T/

100Base-TX ports (default configuration). When the fiber module is installed, ports 1 and 2 RJ-45 LEDs become disabled.

Pressing the front panel LED mode button changes the operation of the

RJ-45 LEDs to 100M Speed and Full Duplex, as shown in Figure 1-4.

The numbers above and below the port LEDs identify the

LEDs associated with a specific RJ-45 port.

Link

Activity

Link

Activity

9 10

Link

Activity

Link

Activity

13 14

11 12

15 16

Link

Activity

Link

Activity

18 19 20

22 23 24

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

10/100 speed

Full/half duplex

10/100 speed

Full/half duplex

4 9

10/100 speed

Full/half duplex

10/100 speed

Full/half duplex

12 17

10/100 speed

Full/half duplex

10/100 speed

Full/half duplex

19 20

23 24

Figure 1-4. Port LEDs LED Mode Button Pressed

4 Product Overview ELS100-24TXM

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

Table 1-2 defines the performance of the port LEDs for the 10Base-T/

100Base-TX ports in both the default configuration and with the LED mode button pressed.

Table 1-2. Port LEDs Defined

Name

Fiber Ports

RJ-45 Ports Default Configuration

Function

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

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

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

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

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

RJ-45 Ports

LED mode button pressed

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

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

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

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

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

Duplex LED On: Indicates the port is in the full duplex mode.

Duplex LED Off: Indicates the port is in the half duplex mode.

9032785 Product Overview 5

Rear Panel

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

Name

Power Connector

Power Switch

Fan Outlets

Figure 1-5. ELS100-24TXM Rear Panel

Table 1-3. Rear Panel Components

Function

Provides AC power to the switch.

Allows you to turn the switch power on and off.

Air exit vents through which internal fans discharge air for ventilation purposes.

Feature Summaries

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

IEEE 802.1D Bridge

The ELS100-24TXM switch is fully compliant with IEEE 802.1D transparent bridging specifications. An aggregate address table containing 4096 entries per 8 switch ports is provided for learning, filtering, and forwarding. The switch can support up to a maximum of

12,288 addresses. Addresses are automatically learned by the switch, and can be individually assigned specific forwarding treatment by the network administrator if desired. Forwarding table configuration can be made out-of-band via the console interface or in-band via SNMP or

Telnet. Static and dynamic addresses are both stored in this table. One static address is assigned per port by default. The Forwarding Table

Configuration screen in the console menus allows you to assign additional static addresses if required.

6 Product Overview ELS100-24TXM

9032785

Spanning Tree Protocol

The ELS100-24TXM switch supports the IEEE 802.1D Spanning Tree

Protocol. This protocol allows redundant connections to be created between different LAN segments for purposes of fault tolerance. Two or more physical paths between different segments can be created through the switch, with the Spanning Tree Protocol choosing a single path at any given time and disabling all others. If the chosen path fails for any reason, a disabled alternative is activated, thereby maintaining the connection.

This prevents network traffic from circulating in an endless loop formed by multiple connections to the same LAN segment.

Spanning Tree parameters are configurable in the Spanning Tree

Configuration Menu using the console menus or via SNMP (see Appendix

B, “Spanning Tree Concepts,” for more information).

Frame Buffering and Frame Latency

The ELS100-24TXM switch is a store-and-forward switching device. Each frame is copied into switch memory before being forwarded to another port. This method ensures that all forwarded frames conform to a standard Ethernet frame size and have a correct cyclic redundancy check

(CRC) for data integrity. This switching method prevents bad frames from traversing the network and using up valuable network bandwidth, as with cut-through switching technology.

To minimize the possibility of dropping frames on congested ports, the

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

Software Download

The ELS100-24TXM switch supports the industry-standard Trivial File

Transfer Protocol (TFTP) for downloading software to the switch. All switch software is stored in a 2 MB sectored flash ROM. The download feature allows you to easily install software upgrades to the unit. Software can alternatively be downloaded via the serial console port using the

XMODEM protocol.

A TFTP or XMODEM software download is invoked via the Download

Software Menu using the console menus. A TFTP download can also be invoked via SNMP.

Non-volatile Parameter Storage

Important operating parameters such as IP addresses, Spanning Tree configuration, and management security parameters, are stored in nonvolatile Flash memory. These values are retained when the switch experiences power interruptions or is powered down for normal maintenance.

Product Overview 7

Configuration and Management Interfaces

The ELS100-24TXM switch can be managed using any of the following three methods:

• Serial console, out-of-band

An RS-232 connection, using a DB-9 connector, is supported for outof-band switch management. Serial console management is performed using a terminal, or computer system running communications software. See Chapter 3, “ELS100-24TXM User Interface,” for more detailed information on managing the ELS100-24TXM switch via the serial console.

• Telnet, in-band (over Ethernet)

The switch supports management through a Telnet connection using the TCP/IP protocols. Telnet is performed using an ASCII terminal or computer system running communications software. See Chapter 3,

“ELS100-24TXM User Interface,” for more detailed information on managing the switch via the serial console. Global password protection for changing the operating parameters of the switch is provided.

• SNMP-based network manager, in-band

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

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

RMON

RMON (Remote Monitoring) is a facility used to manage networks remotely while providing multi-vendor interoperability between monitoring devices and management stations. RMON is defined by an SNMP MIB.

This MIB is divided into nine different groups, each gathering specific statistical information or performing a specific function. RMON-capable devices gather network traffic data and then store them locally until downloaded to an SNMP management station.

The ELS100-24TXM supports four of the nine groups of RMON defined for Ethernet networks on a per port basis. Specifically, these are:

• Statistics: a function that maintains counts of network traffic statistics such as number of packets, broadcasts, collisions, errors, and distribution of packet sizes.

• History: a function which collects historical statistics based on userdefined sampling intervals. The statistical information collected is the same as the Statistics group, except on a time stamped basis.

• Alarm: a function that allows managers to set alarm thresholds based on traffic statistics. Alarms trigger other actions through the Event group.

8 Product Overview ELS100-24TXM

9032785

• Event: a function that operates with the Alarm group to define an action that will be taken when an alarm condition occurs. The event may write a log entry and/or send a trap message.

RMON Statistics group information is displayed on the Port Statistics

Screen in the console menus. Additional RMON functionality is available via SNMP.

Port Mirroring

The ELS100-24TXM switch includes the ability to mirror the traffic being switched on any port for purposes of network traffic analysis and connection integrity. When this feature is enabled, a protocol analyzer or

RMON probe is connected to any port in a group of eight. This port is configured to mirror the traffic from any other port in the same group of ports. The groupings are ports 1-8, 9-16 and 17-24. You can only mirror one port to another port at one time. Port mirroring occurs at the same speed configured for the port (10Mbps-to-10Mbps or 100Mbps-to-

100Mbps). Port mirroring is configurable in the Switch Configuration

Menu using the console menus or via SNMP.

Auto-negotiation

Auto-negotiation is a process that permits the switch to automatically select the operational modes of its 10/100 RJ-45 ports. Upon first being connected, the switch detects the speed of the network the port is connected to, either 10Mbps or 100Mbps, and the type of communication setting, half or full duplex. The port is then automatically set by the switch to operate in the proper mode, without user intervention. It is not required that the network device being connected to the switch supports autonegotiation as the ELS100-24TXM switch automatically adjusts to the network device’s communication settings. Auto-negotiation is configurable in the Port Configuration Menu of the console menus or via

SNMP.

Broadcast Throttling

The ELS100-24TXM has the capability to throttle (or limit) the flooding of packets through the switch. Broadcast, multicast, and unknown destination address unicast packets received by the switch are typically flooded to all ports on the switch or on a given VLAN. When the number of these types of packets being forwarded is large, the performance of the switch in forwarding packets of other types may suffer. A programmable broadcast cutoff rate parameter allows a rate threshold to be set in the switch for the forwarding of broadcast and unknown destination address packets. If the cutoff rate is exceeded, further packets of these types are dropped. This capability helps to alleviate broadcast storms, a problem often encountered in Ethernet networks. Broadcast throttling is configurable in the Switch Configuration menu of the console menus or via SNMP.

Product Overview 9

BootP/DHCP

The Bootstrap Protocol (BootP) and the Dynamic Host Configuration

Protocol (DHCP) provide for the capability of passing configuration information to hosts on a TCP/IP network. Using this process, network devices do not need to be configured before they can communicate using the TCP/IP protocol suite. The ELS100-24TXM switch uses BootP and

DHCP to automatically configure IP address information without requiring access to the console menus. BootP/DHCP operation is configurable using the BootP/DHCP Enable option in the System Configuration Menu of the console menus or via SNMP.

LEDs

The switch port LEDs provide a quick and accurate display of the integrity of switch connections and port mode. The default operation of the RJ-45

LEDs indicates Link (L) and Activity (A) for each of the ports. The operation of these LEDs can be changed by use of the LED mode button on the switch front panel. When the LED mode button is pressed (pressed and held in), the operation of the RJ-45 LEDs changes to indicate 10/100

Mbps speed and full/half duplex operation, respectively. The fiber port

LEDs indicate Link (L) and Activity (A) for each of the ports. The fiber port

LEDs are not affected by the LED mode button.

Full Duplex Mode

The full duplex mode of operation on a port can double the throughput of switch connections. This mode disables the collision detection portion of the Ethernet Carrier Sense Multiple Access with Collision Detection

(CSMA/CD) protocol, allowing for two-way traffic. Full duplex is configurable using the Duplex Mode parameter in the Port Menu of the console menus or via SNMP.

Flow Control

Flow control allows you to manage network traffic during congestion periods and to prevent the loss of packets when port buffer thresholds are exceeded. Flow control also serves to deny access to additional traffic that could add to a congestion condition. The ELS100-24TXM switch supports flow control per the IEEE 802.3x standard. See Appendix C,

“Flow Control,” for more information on this feature.

Virtual LANs (VLANs)

VLANs allow you to connect users to a specific LAN segment regardless of their physical location. The ELS100-24TXM switch supports tagged

VLANs per the IEEE 802.1Q draft standard. With frame tagging, a short tag is appended to every frame that crosses the network backbone. The tag identifies which VLAN the frame belongs to. See Appendix D, “Virtual

LANs,” for more information.

10 Product Overview ELS100-24TXM

Class of Service

Class of Service support allows you to assign a higher priority to selected traffic passing through the switch. The ELS100-24TXM switch supports

Class of Service attributes per the IEEE 802.1p draft standard using a priority queuing mechanism. This feature ensures that traffic during congestion periods will not interfere with traffic assigned a higher priority.

Traffic assigned a lower priority is subject to discard when memory is in short supply. See Appendix E, “Class of Service,” for more information.

Application Examples

The exploding popularity of the Internet and of corporate intranets, as well as new, high-bandwidth desktop applications, are driving the demand for

Fast Ethernet. The increase in multimedia traffic and the need to support legacy protocols alongside new, data intensive applications is driving the need for network segmentation and traffic prioritization.

The ELS100-24TXM switch is ideal for meeting the needs of today’s high performance networks. The switch’s low cost and high port count makes it attractive and affordable for dedicated 10/100Mbps connections to the desktop. In addition, extensive features, including redundant links, traffic

Class of Service and VLAN capability, provide the management needed for the workgroup and local backbone.

The following sections illustrate the ELS100-24TXM switch employed in application examples:

• Client/Server Network

• Local Backbone

9032785 Product Overview 11

Client/Server Network Application

To improve workstation performance in a client/server environment, the

ELS100-24TXM switch can be configured to provide 200 Mbps full duplex

Fast Ethernet connections to servers by connecting each to a dedicated switch port (Figure 1-6). Users can be accommodated through connections to hubs, both at 10Mbps and 100Mbps speeds, through

10Mbps switches with 100Mbps uplinks, or through direct connections.

The fiber uplinks are available to connect the switch to a remote location, such as another building floor or a separate building.

12 Product Overview

Figure 1-6. Client/Server Network Application

ELS100-24TXM

Local Backbone Application

The ELS100-24TXM switch can be used in a local backbone application, connecting network segments together and providing file-server access

(Figure 1-6). Workgroup hubs are provided with a single connection to the switch while servers are put on dedicated 100 Mbps ports. Routers and other networking devices can connect off of the switched backbone as well. The fiber uplinks are available to connect the switch to a remote location, such as another building floor or a separate building.

9032785

Figure 1-7. Local Backbone Application

Product Overview 13

2. INSTALLATION

Inspecting Your Shipment

When you receive the shipment of your switch, check the package contents and make sure you have the following items:

• ELS100-24TXM Fast Ethernet switch

• Fiber port protective plugs inserted into switch

• Mounting ears and mounting screws

• Power cord

• This document

Site Requirements

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

• Mounting

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

Use an EIA standard equipment rack that is grounded and physically secure.

• Power source

Provide a power source within six feet (1.8 m) of the installation location. This source must provide 100 VAC to 240 VAC, and 50 Hz to 60

Hz power, with a 100 VA minimum. Power specifications for the switch are shown in Appendix A, “Specifications.”

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

• Environmental

Install the ELS100-24TXM switch in a dry area, with adequate air circulation. Avoid placing the switch in direct sunlight or near other heat sources, such as hot-air vents. For temperature and humidity specifications, see Appendix A, “Specifications.”

• Ventilation

Do not restrict airflow by covering or obstructing air inlets on the side of the switch or the rear panel internal air fan exits.

9032785 Installation 15

Mounting the Switch on a Table or Shelf

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

16 Installation ELS100-24TXM

Mounting the Switch on a Wall

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

The mounting screws are used to attach the mounting ears to the switch. Once the ears are attached to the switch, you will need to provide appropriate screws to mount the switch to the wall.

Figure 2-1 shows the orientation of the mounting ears for attaching the ears to the switch for a wall mount application. Be sure that the wall surface can safely support the switch.

Do the following:

Mount one of the ears to the switch using two (2) of the supplied screws. Repeat this step for the other side of the switch.

Mount the switch to the wall using appropriate screws.

9032785

Figure 2-1. Mounting the Switch on a Wall

Installation 17

Mounting the Switch in a Rack

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

The mounting screws are used to attach the mounting ears to the switch. Once the ears are attached to the switch, you will need to provide appropriate screws to mount the switch in a rack.

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

Mount one of the ears to the switch using two (2) of the supplied screws. Repeat this step for the other side of the switch.

Slide the switch into the rack and align the holes in the rack mounting ears with the holes in the rack rails.

Insert and tighten appropriate rack-mounting screws (not provided).

18 Installation

Figure 2-2. Mounting the Switch in a Rack

ELS100-24TXM

Installing a Fiber Uplink Module into the Switch

The fiber uplink module option permits you to enable 100Base-FX fiber connections to the switch. A 2 port fiber module can be installed into the modular slot on the left side of the switch (Figure 2-3).

To install the fiber module into the switch, do the following:

Turn off power to the switch.

Remove the blank metal plate from the left side of the switch by unscrewing the two mounting screws.

While maintaining a firm grip on the fiber connectors, insert the fiber module card into the modular slot, with the module components facing upwards. Insert the module into the slot uniformly. There are no card guides. The connector on the fiber module mates with the connector inside the switch. Press firmly until the module is properly seated.

9032785

Figure 2-3. Installing a Fiber Module into the Switch

Position the mounting plate (shipped with the fiber module) over the port connectors and align the mounting plate hole with the modular port holes.

Insert the 2 mounting screws and fasten.

Turn on power to the switch.

Installation 19

Connecting a Terminal to the Console Port

The console port is a serial RS-232 interface port that enables a connection to a terminal for performing switch monitoring and configuration functions. The terminal may be a PC or workstation running terminal emulation software, or a dumb terminal configured as a Data

Terminal Equipment (DTE) connection. Alternatively, this port can be connected to an external modem to enable remote dial-in management.

If you connect a terminal to the console port prior to powering the switch, you can observe the progress and results of the power-up diagnostics as the switch goes through its initialization process.

The console port connector is configured as a female null modem connection using a female DB-9 (see Table A-1 for pinouts). A standard straight-through wired RS-232 cable is typically all that is needed to connect to this interface. Any cable connected to the console port must be shielded to comply with emissions regulations and requirements.

To connect the ELS100-24TXM console port to a terminal, do the following:

Connect a terminal to the console port using an interface cable

(Figure 2-4).

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

Connect the male connector of the interface cable directly to the switch console port and tighten the captive retaining screws.

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

From your terminal, start the terminal emulation program.

20 Installation ELS100-24TXM

Configure the terminal to the following communication settings: 9600 baud, no parity, 8 data bits, 1 stop bit, no hardware flow control,

ASCII character set.

Powering the Switch

To supply power to the switch, do the following:

Connect the power cord to the switch and to a grounded three-prong wall outlet (Figure 2-5). See Appendix A, “Power Cord Set

Requirements,” for more information regarding specific international power cord requirements.

9032785

Figure 2-5. Connecting the Power Cord to the Switch

Turn on the power switch.

The Power LED lights green (see Figure 1-1). If it does not, check to make sure that the power cable is plugged in correctly and that the power source is good.

Power-Up

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

The switch performs two basic types of tests at power-up. During this time, the Test LED (see Figure 1-1) lights steady green. These tests are:

• Serial port

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

Installation 21

• Memory

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

After these two tests are performed, the operational software of the switch is loaded. A series of more extensive diagnostic tests are then conducted during which the Test LED remains lit. The results of the tests are displayed on the terminal. If all tests pass, the Test LED turns off. When all tests are complete, the system is functional and the user interface is ready to receive commands at the console.

Network Cable Requirements

Copper

Table 2-1 specifies the cable types and length constraints for the copper interfaces on the ELS100-24TXM.

Table 2-1. Copper Cable Specifications

Interface Type

10Base-T

100Base-TX

Cable Requirement

Category 3 or 5 Unshielded Twisted

Pair (UTP)

Category 5 UTP

Maximum Length

100m (328 ft.)

Fiber

Table 2-2 specifies the fiber types and length constraints on the

ELS100-24TXM.

Table 2-2. Fiber Specifications

Interface Type

100Base-FX

Fiber Type multi-mode single-mode

Fiber Diameter

(microns)

62.5

Maximum Length

2,000m (6,560 ft.)

20,000m (65,600 ft.)

22 Installation ELS100-24TXM

10Base-T/100Base-TX Ports

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

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

The 10Base-T/100Base-TX ports interface to UTP cabling for connection to 10Base-T or 100Base-TX network segments or end-stations. These

UTP connections meet the requirements of ISO 8877, specified by

10Base-T, Section 14 of the IEEE 802.3 specification. The ports are wired with the MDI-X function implemented. Workstations or servers can be connected to the ELS100-24TXM switch using standard straight-through wired cables.

For connections to hubs or other switches, a crossover cable may be necessary (refer to the “MDI/MDI-X Crossover Cable Wiring” section in

Appendix A). See Table A-2 for 10Base-T/100Base-TX connector pin assignments.

9032785 Installation 23

100Base-FX Fiber Ports

The 100Base-FX Fiber ports use SC connectors. Figure 2-7 shows an SC fiber connector being inserted into a fiber port on the ELS100-24TXM.

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

Depending on the fiber uplink module employed (see Table 2-3), these ports support either multi-mode 62.5/125

µ m fiber or single-mode 9/

125

µ m fiber. The 100Base-FX ports use SC fiber connectors. The SC fiber connectors are configured as a receive (RX)/transmit(TX) pair with the RX connector positioned on the left side of the port and the TX connector on the right side of the port.

Fiber Uplink Modules

Table 2-3 provides information for the three different 2 port fiber uplink modules (daughtercards) available for the ELS100-24TXM.

Table 2-3. Fiber Uplink Modules

Part Number

EPIM100-2F2

EPIM100-2F3

EPIM100-2F4

Functions

100Base-FX-MM

100Base-FX-SM

100Base-FX-MM

Description

2 port multimode (MM) fiber uplink module using SC fiber connectors.

2 port singlemode (SM) fiber uplink module using SC fiber connectors.

2 port (1 SM and 1 MM) fiber uplink module using SC fiber connectors.

24 Installation ELS100-24TXM

3. ELS100-24TXM USER INTERFACE

Overview

When you have connected a terminal to the console port, or used Telnet to access the switch over the network, access is gained to the console menus. These menus allow you to reconfigure the switch from its factory default settings, as well as to monitor switch status and performance. The menus have a layout similar to the sample Main Menu shown in Figure 3-

1. The information is divided into the following parts:

• Menu Identification (includes model number)

• Menu Name (includes access privileges)

• Selectable Items listed by letters

• Screen Prompt for menu selections and entry of field parameters, and Message Area for display of next entry option, parameters, or error messages.

Menu ID

Menu name

Selectable items

Screen prompt and message area

Cabletron Systems ELS100-24TXM Access Control: READ/WRITE

MAIN MENU

a. System Configuration Menu

b Switch Configuration Menu

c. Port Menu

d. Switch Statistics Screen

e. General Information Screen

f. Download Software Menu

g. Save Current Configuration

h. Return to Default Configuration

i. Logout

j. Reset

Enter Selection:

Figure 3-1. Sample Main Menu

9032785 ELS100-24TXM User Interface 25

User Access

There are two modes of access to the user interface: READ-ONLY and

READ/WRITE. READ-ONLY access allows you to view switch information, but not modify any operating parameters. READ/WRITE access allows you to both read and modify switch information. You are required to login with a password before obtaining READ/WRITE access.

If no password is entered (press only the [Enter] key), you are logged in with READ-ONLY access.

No password is configured in the factory default settings, allowing full READ/WRITE access until a password is set.

To use the console menus, do the following:

Type the letter associated with the desired option.

If the selected item is a submenu title, the submenu is displayed when you enter the letter.

Enter the parameter requested by the screen prompt.

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

26 ELS100-24TXM User Interface ELS100-24TXM

Factory Defaults

Table 3-1 lists the factory default settings for the switch configuration parameters. Each of these parameters can be changed via the console menus or Telnet.

Table 3-1. Factory Default Settings

Parameter

Active Aging Time

Auto-negotiation Enable

Broadcast Cutoff Rate

BootP/DHCP Enable

Bridge Priority

Class of Service Enable

Class of Service Port Priority

Class of Service Priority

Threshold

Flow Control Enable

Forward Delay

Full Duplex

Hello Time

Max Age

Password

Path Cost

Port Enable

Port Priority

Port Speed

Port Mirroring Enable

Screen Timeout

SNMP Private Community Name

SNMP Public Community Name

Spanning Tree Protocol Enable

Terminal Baud Rate

Terminal Hardware Flow Control

VLAN Enable

VLAN Port Type

Default Value

300

Yes

500000

Yes

32768

Yes

128

100

0 private

Yes

<none>

10 for 100Mbps speed ports

100 for 10Mbps speed ports public

9600

Access

9032785 ELS100-24TXM User Interface 27

Menu Hierarchy

Figure 3-2 shows the ELS100-24TXM switch user interface menu hierarchy.

System

Configuration

SNMP Configuration Menu

System Name

System Location

System Contact

IP Address

Subnet Mask

Default Gateway

BootP/DHCP Enable

Screen Timeout (minutes)

Password

Terminal Baud Rate

Switch

Configuration

Port Menu

Switch

Statistics

Screen

Forwarding Table Configuration Menu

Spanning Tree Configuration Menu

VLAN Configuration Menu

Class of Service Configuration Menu

Forwarding Table Aging Time (seconds)

Broadcast Cutoff Rate

Port Mirroring Enable

Mirrored Port

Mirroring Port

Port Name

Enable Status

Link Status

Auto Negotiated Status

Full Duplex Status

Speed (10/100Mbps)

Port Type

Flow Control

Configure

Transmitted

Received

Forwarded

Filtered

Dropped

Errored

Switch Summary

Port Statistics

General

Information

Screen

Software Version

Serial Number

Base MAC Address

Up Time (minutes)

Power Up Count

Download Software Menu

Save Current Configuration

Return to Default Configuration

Logout

Reset

SNMP Private Community Name

SNMP Public Community Name

Trap Destination #1-4

Community Name #1-4

Display Table

Make Entry Static

Add Static Entry

Delete Static Entry

Modify Static Entry

Search by Port#

Search by MAC Address

Spanning Tree Protocol Enable

Port Configuration Menu

Hello Time (seconds)

Forward Delay (seconds)

Max Age (seconds)

Bridge Priority

VLAN Enable

VLAN Menu

VLAN Port Menu

Class of Service Enable

Priority Threshold

Configure Port Priority

Port Name

Port Enable

Flow Control Enable

Auto-negotiation Enable

Full Duplex

Port Speed

Frames Transmitted

Frames Received

Frames Forwarded

Frames Filtered

Frames Dropped

Frames Errored

Port #n Statistics

Port ID

Port Name

Path Cost

Port Priority

Port State

Select Port

VLAN Name

Ports in VLAN

VLAN Egress Ports

Configure

Port ID

Port Name

Type

Modify Port Type

Port ID

Port Name

Priority Default

Configure

Frames Transmitted

Frames Received

Frames Forwarded

Frames Filtered

Frames Dropped

Broadcasts Transmitted

Broadcasts Received

Multicasts Transmitted

Multicasts Received

Bytes Transmitted

Bytes Received

Pause Frames Transmitted

Pause Frames Received

Collisions

Late Collisions

CRC/Alignment Errors

Undersized Frames

Oversized Frames

Fragments

Jabbers

64 Byte Frames

65 to 127 Byte Frames

128 to 255 Byte Frames

256 to 511 Byte Frames

512 to 1023 Byte Frames

1024 to 1518 Byte Frames

Figure 3-2. ELS100-24TXM User Interface Menu Hierarchy

28 ELS100-24TXM User Interface ELS100-24TXM

Main Menu

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

MAIN MENU Access Control: READ/WRITE a. System Configuration Menu b Switch Configuration Menu c. Port Menu d. Switch Statistics Screen e. General Information Screen f. Download Software Menu g. Save Current Configuration h. Return to Default Configuration i. Logout j. Reset x. Previous Menu

Enter Selection:

Figure 3-3. Main Menu

Selection

System

Configuration Menu

Switch

Configuration Menu

Port Menu

Switch Statistics

Screen

General Information Screen

Download Software

Save Current

Configuration

Return to Default

Configuration

Logout

Reset

Description

Contains commands and parameters that reflect the global configuration of the switch related to management.

Provides access to information and parameters affecting the function of the switch, i.e. the movement of packets through the switch. For example, you can configure Forwarding Table, Spanning Tree, and virtual LANs (VLANs).

Shows the configuration of the individual ports on the switch and allows you to modify switch port operation.

Presents switch-level and port-level statistics.

Displays the system software version, switch serial number, base MAC address, system up time and power-up count.

Contains parameters and commands for initiating a software download to upgrade the switch operating software.

Saves current switch operating parameters to non-volatile memory.

Restores switch operating parameters to factory defaults.

You must reset the switch for activate default parameters.

Logs out of the console interface. Once you logout, you must enter a password before you can access the console interface again.

Performs a software reset of the switch by restarting the system software and reloading all operating parameters.

9032785 ELS100-24TXM User Interface 29

System Configuration Menu

The System Configuration Menu enables modification of system-level switch configuration parameters. Select a from the Main Menu to view the

System Configuration Menu. Figure 3-4 shows the System Configuration

Menu and the accompanying table describes the System Configuration

Menu.

SYSTEM CONFIGURATION a. SNMP Configuration Menu b System Name c. System Location d. System Contact e. IP Address f. Subnet Mask g. Default Gateway h. BootP/DHCP Enable i. Screen Timeout (minutes) j. Password k. Terminal Baud Rate l. Terminal Hardware Flow Control x. Previous Menu

Enter Selection:

Access Control: READ/WRITE

000.000.000.000

Yes

None

9600

Figure 3-4. System Configuration Menu

Selection

SNMP Configuration Menu

System Name

System Location

System Contact

IP Address

Subnet Mask

Default Gateway

BootP/DHCP Enable

Screen Timeout (minutes)

Password

Terminal Baud Rate

Terminal Hardware Flow

Control

Description

Menu for configuring SNMP-related parameters.

The switch administrative name (1-36 character range).

The physical switch location (1-36 character range).

The switch contact person (1-36 character range).

The IP address of the switch.

Subnet mask associated with the switch IP address.

The default gateway (or router) to which the switch sends

IP packets destined for a different subnet.

Allows you to enable (Yes) or disable (No) the BootP and

DHCP protocols for automatically configuring the switch’s IP address information.

The duration of time before a serial console or Telnet session terminates due to user inactivity (0-65535 numeric range). A value of “0” means that the screen will not terminate at any time.

Allows “read/write” access to the user interface, via the serial console or Telnet (1-10 character range).

Serial console baud rate (2400, 9600 or 19200).

Allows you to enable (Yes) or disable (No) hardware flow control on serial console interface. Signals DTR, RTS and CTS are used for this purpose. Flow control should be enabled if using external modem.

30 ELS100-24TXM User Interface ELS100-24TXM

SNMP Configuration Menu

The SNMP Configuration Menu allows you to modify SNMP-related configuration parameters. Select a from the System Configuration Menu to view the SNMP Configuration Menu. Figure 3-5 shows the SNMP

Configuration Menu and accompanying table describes the SNMP

Configuration Menu.

Selection

SNMP Private

Community Name

SNMP Public

Community Name

Trap Destination #1

Community Name #1

Trap Destination #2

Community Name #2

Trap Destination #3

Community Name #3

Trap Destination #4

Community Name #4

SNMP CONFIGURATION a. SNMP Private Community Name b. SNMP Public Community Name c. Trap Destination #1 d. Community Name #1 e. Trap Destination #2 f. Community Name #2 g. Trap Destination #3 h. Community Name #3 i. Trap Destination #4 j. Community Name #4 x. Previous Menu

Enter Selection:

Access Control: READ/WRITE private public

000.000.000.000

public

000.000.000.000

public

000.000.000.000

public

000.000.000.000

public

Figure 3-5. SNMP Configuration Menu

Description

The community name for read/write SNMP access to the device (1-10 character range; the default name is: “private”).

The community name for read only SNMP access to the device (1-10 character range; the default name is: “public”).

The IP address of trap destination #1 where SNMP trap messages are forwarded.

The SNMP community name to use for traps forwarded to trap destination #1.

The IP address of trap destination #2 where SNMP trap messages are forwarded.

The SNMP community name to use for traps forwarded to trap destination #2.

The IP address of trap destination #3 where SNMP trap messages are forwarded.

The SNMP community name to use for traps forwarded to trap destination #3.

The IP address of trap destination #4 where SNMP trap messages are forwarded.

The SNMP community name to use for traps forwarded to trap destination #4.

9032785 ELS100-24TXM User Interface 31

Switch Configuration Menu

The Switch Configuration Menu allows you to modify switching-related configuration parameters. Select b from the Main Menu to view the Switch

Configuration Menu. Figure 3-6 shows the Switch Configuration Menu and the accompanying table describes the Switch Configuration Menu.

SWITCH CONFIGURATION Access Control: READ/WRITE a. Forwarding Table Configuration Menu b. Spanning Tree Configuration Menu c. VLAN Configuration Menu d. Class of Service Configuration Menu e. Forwarding Table Aging Time(seconds) 300 f. Broadcast Cutoff Rate g. Port Mirroring Enable h. Mirrored Port

500000

2 i. Mirroring Port j. Transmit Data Mirror Enable k. Receive Data Mirror Enable

Yes

No x. Previous Menu

Enter Selection:

Figure 3-6. Switch Configuration Menu

Selection

Forwarding Table

Configuration Menu

Description

Menu for configuring the switch forwarding table.

Spanning Tree Configuration

VLAN Configuration Menu

Class of Service Configuration

Forwarding Table Aging Time

Menu for configuring the switch Spanning Tree operation.

Menu for configuring the VLAN operation of the switch.

Menu for configuring Class of Service for the switch.

Broadcast Cutoff Rate

Port Mirroring Enable

Time in seconds until entries in the filter table are aged out if not accessed (10-1,000,000 second range).

Per second rate past which broadcast and destination unknown unicast frames are not flooded on each group of 8 ports on the switch (100-500,000 frames per second range).

Allows you to enable (Yes) or disable (No) port mirroring.

Mirrored Port

Mirroring Port

The source port for the data to be mirrored.

The destination port for the data to be mirrored.

Transmit Data Mirror Enable * Allows you to enable (Yes) or disable (No) the mirroring of data transmitted out the mirrored port.

Receive Data Mirror Enable * Allows you to enable (Yes) or disable (No) the mirroring of data received by the mirrored port.

* Only one of these options can be enabled at any given time. Changing the setting of one of these options automatically changes the setting of the other option.

32 ELS100-24TXM User Interface ELS100-24TXM

Forwarding Table Configuration Menu

The Forwarding Table Configuration Menu allows you to view and modify forwarding table parameters. The MAC address of each forwarding table entry is displayed along with its type, disposition, and associated port number. Select a from the Switch Configuration Menu to view the

Forwarding Table Configuration Menu. Figure 3-7 shows the Forwarding

Table Configuration Menu and the accompanying table describes the

Forwarding Table Configuration Menu.

Field

MAC Address

Type

Disposition

Port ID

Port Name

Selection

First Page

Last Page

FORWARDING TABLE CONFIGURATION Access Control: READ/WRITE

MAC ADDRESS TYPE DISPOSITION PORT ID PORT NAME

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

0a0a0a0a0a0b DYNAMIC FORWARD 1

0a0a0a0a0a0b DYNAMIC FORWARD 2

0a0a0a0a0a0c DYNAMIC FORWARD 3

0a0a0a0a0a0d DYNAMIC FORWARD 4

0a0a0a0a0a0e DYNAMIC FORWARD 5

0a0a0a0a0a0f DYNAMIC FORWARD 6

0a0a0a0a0a10 DYNAMIC FORWARD 7

0a0a0a0a0a11 DYNAMIC FORWARD 8 n. Next Page p. Previous Page f. First Page l. Last Page a. Display Table b. Make Entry Static c. Add Static Entry d. Delete Static Entry e. Modify Static Entry s. Search by Port # m. Search by MAC Address x. Previous Menu

Enter Selection:

Figure 3-7. Forwarding Table Configuration Menu

Description

MAC address for the listed port.

Displays the type of address entry: system, dynamic or static.

Displays disposition of the address entry: local, forward or discard.

Displays the port number associated with the MAC address entry.

Displays the administrative name assigned to the port.

Description

Displays the next page of the forwarding table.

Displays the previous page of the forwarding table.

Displays the first page (top) of the forwarding table.

Displays the last page of the forwarding table.

continued on next page

9032785 ELS100-24TXM User Interface 33

Selection

Display Table

Make Entry Static

Add Static Entry

Delete Static Entry

Modify Static Entry

Search by Port #

Search by MAC Address

Description

Redisplays the forwarding table.

Makes a dynamic entry in the forwarding table static.

Adds a static entry to the forwarding table.

Deletes a static entry from the forwarding table.

Modifies a static entry from the forwarding table.

Performs a search by port number and posts the search results at the top of the screen.

Performs a search by MAC Address and posts the search results at the top of the screen.

34 ELS100-24TXM User Interface ELS100-24TXM

Spanning Tree Configuration Menu

The Spanning Tree Configuration Menu allows you to view and modify

Spanning Tree parameters. Select b from the Switch Configuration Menu to view the Spanning Tree Configuration Menu. A letter identifies selections that can be modified. All other fields are read-only. Figure 3-8 shows the Spanning Tree Configuration Menu and the accompanying table describes the Spanning Tree Configuration Menu.

SPANNING TREE CONFIGURATION Access Control: READ/WRITE

Bridge ID 32768-000000000000

Designated Root

Root Path Cost 0

Root Port

Topology Change Count

NO PORT

No a. Spanning Tree Protocol Enable b. Port Configuration Menu c. Hello Time (seconds) d. Forward Delay (seconds) e. Max Age (seconds) f. Bridge Priority

32768 x. Previous Menu

Enter Selection:

Figure 3-8. Spanning Tree Configuration Menu

Field

Bridge ID

Designated Root

Root Path Cost

Root Port

Topology Change Count

Description

A unique identifier for the bridge (switch) in the Spanning Tree. The ID is a combination of the bridge priority and port 1 MAC address.

The bridge in the Spanning Tree with the lowest Bridge

ID value, designated as the root bridge.

The cost of the path to the root bridge.

The port identifier of the port that offers the lowest cost path to the root bridge.

The count of the number of times the network topology has changed from a Spanning Tree reconfiguration.

continued on next page

9032785 ELS100-24TXM User Interface 35

Selection

Spanning Tree Protocol

Enable

Port Configuration Menu

Hello Time (seconds)

Forward Delay (seconds)

Max Age (seconds)

Bridge Priority

Description

Allows you to enable (Yes) or disable (No) the global

Spanning Tree operation on the switch.

Provides access to the Spanning Tree Port Configuration Menu.

The time interval between the sending of Configuration

BPDUs by the bridge, if it is root (1-10 second range).

The time interval delay before a port transfers into the forwarding state, if it is root (4-30 second range).

The maximum age of received protocol information before it is discarded (6-40 second range).

A relative priority of bridges, with the lowest value bridge

ID indicating the highest priority (0-65535 range).

36 ELS100-24TXM User Interface ELS100-24TXM

Spanning Tree Port Configuration Menu

The Spanning Tree Port Configuration Menu allows you to view Spanning

Tree Configuration information for all of the ports in a table format. Select

b from the Spanning Tree Configuration Menu to view the Spanning Tree

Port Configuration Menu. Figure 3-9 shows the Spanning Tree Port

Configuration Menu and the accompanying table describes the Spanning

Tree Port Configuration Menu.

SPANNING TREE PORT CONFIGURATION Access Control: READ/WRITE

PORT ID PORT NAME PATH COST PORT PRIORITY PORT STATE

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

1 10 128 FORWARDING

2 10 128 FORWARDING

3 10 128 FORWARDING

4 10 128 FORWARDING

5 10 128 FORWARDING

6 10 128 FORWARDING

7 10 128 FORWARDING

8 10 128 FORWARDING

9 10 128 FORWARDING

10 10 128 FORWARDING l. Last Page n. Next Page a. Select Port

Enter Selection: p. Previous Page f. First Page r. Refresh x. Previous Menu

Figure 3-9. Spanning Tree Port Configuration Menu

Field

Port ID

Port Name

Path Cost

Port Priority

Port State

Selection

First Page

Last Page

Select Port

Description

A unique identifier for a port on the bridge (switch).

The administrative name assigned to the port.

The contribution of the path through this port, when it is the root port, to the total path cost from this bridge to the root bridge. 10 for 100Mbps ports, 100 for 10Mbps ports.

The relative priority of the port on the bridge.

The current Spanning Tree state of the port on the bridge, either disabled, listening, learning, forwarding, or blocking.

Description

Displays the next page of the table.

Displays the previous page of the table.

Displays the first page (top) of the table.

Displays the last page of the table.

Allows you to enter a port number to view and modify port parameters in the Spanning Tree Port #n Configuration Menu.

9032785 ELS100-24TXM User Interface 37

Spanning Tree Port #n Configuration Menu

The Spanning Tree Port #n Configuration Menu allows you to view

Spanning Tree Port Configuration information for an individual port.

Select a from the Spanning Tree Port Configuration Menu to view the

Spanning Tree Port # n Configuration Menu. Figure 3-10 shows the

Spanning Tree Port # n Configuration Menu and the accompanying table describes the Spanning Tree Port # n Configuration Menu. The “Port #n” designation represents the specific port number for configuration.

SPANNING TREE PORT #1 CONFIGURATION Access Control: READ/WRITE

Port State

MAC Address

Designated Cost

Designated Port

Designated Root

Designated Bridge

DISABLED

000000000000

32768 a. Path Cost b. Port Priority x. Previous Menu

Enter Selection:

Figure 3-10. Spanning Tree Port Configuration Menu

Field

Port State

MAC Address

Designated Cost

Designated Port

Designated Root

Designated Bridge

Selection

Path Cost

Port Priority

Description

The current Spanning Tree state of the port, either disabled, listening, learning, forwarding, or blocking.

The MAC address of the port.

The cost of the path to the Root offered by the designated port for the LAN associated with the port.

The Port ID of the port believed to be the designated port for the LAN associated with the port.

The Bridge ID of the bridge recorded as the Root for the LAN associated with the port.

The Bridge ID of the bridge believed to be the designated bridge for the LAN associated with the port.

Description

The contribution of the path through this port, when it is the root port, to the total path cost from this bridge to the root bridge (1-65535 range).

The relative priority of the port on the bridge (0-255 range).

38 ELS100-24TXM User Interface ELS100-24TXM

VLAN Configuration Menu

The VLAN Configuration Menu allows you to configure the operation of

Virtual LANs (VLANs) in the switch. Select c from the Switch

Configuration Menu to view the VLAN Configuration Menu. Figure 3-11 shows the VLAN Configuration Menu and the accompanying table describes the VLAN Configuration Menu. See Appendix D, “Virtual LANs

(VLANs)” for more information about this feature.

VLAN CONFIGURATION Access Control: READ/WRITE

a. VLAN Enable No

b. VLAN Menu

c. VLAN Port Menu

x. Previous Menu

Enter Selection:

Figure 3-11. VLAN Configuration Menu

Selection

VLAN Enable

VLAN Menu

VLAN Port Menu

Description

Allows you to enable (Yes) or disable (No) the global VLAN operation of the switch.

Allows you to open the VLAN Menu.

Menu for configuring VLAN information per port.

9032785 ELS100-24TXM User Interface 39

VLAN Menu

The VLAN Menu displays the configuration of VLANs in the switch and allows access to the VLAN #n Configuration Menu to create and configure

VLANs. Select b from the VLAN Configuration Menu to view the VLAN

Menu. Figure 3-12 shows the VLAN Menu and the accompanying table describes the VLAN Menu.

VLAN MENU Access Control: READ/WRITE

ID VLAN NAME PORTS IN VLAN VLAN EGRESS PORTS

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

1 default 1-24 None

c. Configure d. Delete x. Previous Menu

Enter Selection:

Figure 3-12. VLAN Menu

Field

VLAN Name

Ports in VLAN

VLAN Egress Ports

Selection

Configure

Delete

Description

The identification number of the VLAN (1-4 character range).

The administrative name assigned to the VLAN (1-14 character range; entering a VLAN name is not required).

The ports assigned to the VLAN.

The egress (exit) ports which link the ELS100-24TXM to other devices which also include members of the same VLAN.

Description

Allows you to configure an existing VLAN listed in the VLAN table, create a new VLAN (1-4094 numerical range), and to open the VLAN #n Configuration Menu.

Allows you to delete a specific VLAN.

40 ELS100-24TXM User Interface ELS100-24TXM

VLAN #n Configuration Menu

The VLAN #n Configuration Menu allows you to configure a name for a specific VLAN, add or remove a port in the VLAN, and add or remove an egress port in the VLAN. Select c from the VLAN Menu to view the VLAN

#n Configuration Menu. Figure 3-13 shows the VLAN #n Configuration

Menu and the accompanying table describes the VLAN #n Configuration

Menu.

The designation “#n” represents the number of the specific VLAN to be configured.

When configuring ports using the Ports in VLAN parameter, they will be moved to that selected VLAN, and automatically removed from their previous VLAN.

VLAN #n CONFIGURATION Access Control: READ/WRITE

Ports in VLAN 1-24

VLAN Egress Ports None a. VLAN Name b. Add Port in VLAN c. Remove Port In VLAN d. Add VLAN Egress Port e. Remove VLAN Egress Port x. Previous Menu

Enter Selection: default

Figure 3-13. VLAN #n Configuration Menu

Field

Ports in VLAN

VLAN Egress Ports

Selection

VLAN Name

Add Port in VLAN

Remove Port in VLAN

Add VLAN Egress Port

Remove VLAN Egress Port

Description

Lists the ports in the specific VLAN.

Lists the VLAN Egress Ports for the specific VLAN.

Description

Allows you to enter an administrative name for the

VLAN (1-14 character range; entering a VLAN name is not required).

Allows you to enter a port in the VLAN.

Allows you to remove a port in the VLAN.

Allows you to add a VLAN Egress Port.

Allows you to remove a VLAN Egress Port.

9032785 ELS100-24TXM User Interface 41

VLAN Port Menu

The VLAN Port Menu displays a table of VLAN configuration information on a per port basis and allows you to modify the VLAN Port Type. Select

c from the VLAN Configuration Menu to view the VLAN Port Menu. Figure

3-14 shows the VLAN Port Menu and the accompanying table describes the VLAN Port Menu.

VLAN PORT MENU Access Control: READ/WRITE

PORT ID PORT NAME TYPE

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

ACCESS

ACCESS n. Next Page p. Previous Page f. First Page l. Last Page a. Modify Port Type

Enter Selection: x. Previous Menu

Figure 3-14. VLAN Port Configuration Menu

Field

Port ID

Port Name

Type

Description

The number assigned to the port.

The administrative name assigned to the port

The VLAN type for each port (either Hybrid or Access). Hybrid ports accept tagged and non-tagged frames while Access ports only allow non-tagged frames.

Description Selection

First Page

Last Page

Displays the next page of the table.

Displays the previous page of the table.

Displays the first page of the table.

Displays the last page of the table.

Modify Port Type Allows you to modify the port type (either Hybrid or Access).

42 ELS100-24TXM User Interface ELS100-24TXM

Class of Service Configuration Menu

The Class of Service Configuration Menu allows you to configure Class of

Service settings for the system as well as to set the Class of Service for

VLAN tagged frames. Select d from the Switch Configuration Menu to view the Class of Service Configuration Menu. Figure 3-15 shows the

Class of Service Configuration Menu and the accompanying table describes the Class of Service Configuration Menu.

CLASS OF SERVICE CONFIGURATION Access Control: READ/WRITE a. Class of Service Enable b. Priority Threshold c. Configure Port Priority x. Previous Menu

Enter Selection:

Figure 3-15. Class of Service Configuration Menu

Selection

Class of Service

Enable

Priority Threshold

Configure Port Priority

Description

Allows you to enable (Yes) or disable (No) Class of Service operation for the system.

Allows you to enter the global priority threshold level. The configurable range is 0-7 (0=low, 7=high).

VLAN tagged frames with a priority level below this threshold level will be assigned normal priority level through the switch.

VLAN tagged frames with a priority level equal to or greater than this threshold level will be assigned high priority through the switch.

Allows you to open the Port Priority Menu for configuring

Class of Service information per port.

9032785 ELS100-24TXM User Interface 43

Port Priority Menu

The Port Priority Menu allows you to modify and display a table which shows Class of Service configuration information on a per port basis.

Select c from the Class of Service Configuration Menu to view the Port

Priority Configuration Menu. Figure 3-16 shows the Port Priority

Configuration Menu and the accompanying table describes the Port

Priority Configuration Menu.

PORT PRIORITY Access Control: READ/WRITE

PORT ID PORT NAME PRIORITY DEFAULT

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

1 0

0 n. Next Page p. Previous Page f. First Page l. Last Page c. Configure x. Previous Menu

Enter Selection:

Figure 3-16. Port Priority Configuration Menu

Field

Port ID

Port Name

Priority Default

Selection

First Page

Last Page

Configure

Description

The port number assigned to the port.

The administrative name assigned to the port (1-14 character range).

The priority level assigned to non-tagged frames entering the associated port. The configurable range is 0-7 (0=low, 7=high).

This value, compared to the Priority Threshold Value, determines the priority level assigned to all non-tagged frames.

Description

Displays the next page of the table.

Displays the previous page of the table.

Displays the first page of the table.

Displays the last page of the table.

Allows you to configure the priority default for a specific port (0-

7 number range).

44 ELS100-24TXM User Interface ELS100-24TXM

Port Menu

The Port Menu allows you to display information for each port in a table format, as well as to access the Port Configuration Menu. You can also refresh the screen information. Select c from the Main Menu to view the

Port Menu. Figure 3-17 shows the Port Menu and the accompanying table describes the Port Menu.

PORT MENU Access Control: READ/WRITE

ID PORT NAME ENABLED

LINK AUTO FULL FLOW

STATUS NEGOTIATED DUPLEX SPEED TYPE CONTROL

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

1 Yes CONNECTED No Yes 100 100FX-MM No

Yes

CONNECTED

Yes

100

100FX-MM No

100TX

Yes

CONNECTED

Yes

100

100TX

100 100TX

No l. Last Page n. Next Page

r. Refresh p. Previous Page f. First Page c. Configure x. Previous Menu

Enter Selection:

Figure 3-17. Port Menu

Field

Port Name

Enabled

Link Status

Auto

Negotiated

Full Duplex

Speed

Port Type

Description

The number assigned to the port.

The administrative name assigned to the port (1-14 character range).

The current “enabled” state of the port, either “Yes” or “No.”

The current link state of the port, either “Connected” or “Disconnected.”

The current state of auto-negotiation for the port, whether or not it has completed auto-negotiation, either “Yes” or “No”.

The current full duplex state of the port, either “Yes” or “No.”

The current speed of the port, either 10Mbps or 100Mbps.

Current connection type: 10T=10Base-T, 100T=100Base-TX;

100FX-MM=100Base-FX multi-mode fiber, 100FX-SM=100Base-FX single-mode fiber.

Flow Control

Selection

The current enable/disable flow control port state, either “Yes” or “No.”

Description

Next Page Displays the next page of the table.

Previous Page Displays the previous page of the table.

First Page

Last Page

Refresh

Configure

Displays the first page (top) of the table.

Displays the last page of the table.

Refreshes the screen to reflect latest system conditions.

Opens up the Port Configuration Menu. From this menu you can configure an individual port or multiple ports (See Section 4).

9032785 ELS100-24TXM User Interface 45

Port Configuration Menu

The Port Configuration Menu allows you to configure port settings for a specific port. Select c from the Port Menu to view the Port Configuration

Menu. Figure 3-18 shows the Port Configuration Menu and the accompanying table describes the Port Configuration Menu.

PORTS 1-5 CONFIGURATION Access Control: READ/WRITE

a Port Name

b. Port Enable

c. Flow Control Enable

d. Auto-negotiation Enable

e. Full Duplex

f. Port Speed

x. Previous Menu

Enter Selection:

Yes

100

Figure 3-18. Port Configuration Menu

Selection

Port Name

Description

Allows you to assign an administrative name to the port (1-14 character range).

Port Enable

Flow Control Enable

Auto-negotiation

Enable*

Full Duplex*

Allows you to enable (Yes) or disable (No) the port(s).

Allows you to enable (Yes) or disable (No) flow control on the port(s).

Allows you to enable (Yes) or disable (No) the auto-negotiation mode for the port(s).

If Auto-negotiation Enable is set to “No,” the Full Duplex and

Port Speed fields display and are eligible for configuration.

If Auto-negotiation Enable is set to “Yes,” the Full Duplex and

Port Speed fields disappear and the system automatically manages these functions.

Allows you to enable (Yes) or disable (No) the full duplex mode for the port(s).

Port Speed* Allows you to set the speed (10 or 100Mbps) for the port(s).

* These parameters are not configurable for 100Base-FX ports, which only operate in full duplex mode and at 100Mbps speed.

46 ELS100-24TXM User Interface ELS100-24TXM

Switch Statistics Screen

The Switch Statistics Screen provides a summary display of port-level statistics, and provides access to the Port Statistics screens. You can also clear or refresh the statistics. Select d from the Main Menu to view the

Switch Statistics Screen. Figure 3-19 shows the Switch Statistics Screen and the accompanying table describes the Switch Statistics Screen.

SWITCH STATISTICS Access Control: READ/WRITE

ID TRANSMITTED RECEIVED FORWARDED FILTERED DROPPED ERRORED

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

1 0 0 0 0 0 0

2 0 0 0 0 0 0

3 0 0 0 0 0 0

4 0 0 0 0 0 0

5 0 0 0 0 0 0

6 0 0 0 0 0 0

7 0 0 0 0 0 0

8 0 0 0 0 0 0

9 0 0 0 0 0 0

10 0 0 0 0 0 0

n. Next Page p. Previous Page f. First Page l. Last Page

s. Switch Summary d. Port Statistics

r. Refresh c. Clear x. Previous Menu

Enter Selection:

Figure 3-19. Switch Statistics Screen

Field Description

ID The number assigned to the port.

Transmitted

Received

Forwarded

Number of frames transmitted out the port.

Number of frames received on the port.

Number of frames forwarded through the port.

Filtered

Dropped

Number of frames filtered on the port.

Number of frames received on the port that were dropped by the switch due to lack of resources.

Errored

Selection

First Page

Last Page

Switch Summary

Port Statistics

Refresh

Clear

Number of errored frames received on the port.

Description

Displays the next page of the table.

Displays the previous page of the table.

Displays the first page of the table.

Displays the last page of the table.

Allows you to open the Switch Summary Screen.

Allows you to open the Port Statistics Screen.

Refreshes switch statistics.

Clears (or sets to zero) switch statistics.

9032785 ELS100-24TXM User Interface 47

Switch Summary Screen

The Switch Summary Screen allows you to display sum total statistics for all ports of the switch. You can also clear or refresh the statistics. Select

s from the Switch Statistics Screen to view the Switch Summary screen.

Figure 3-20 shows the Switch Summary Screen and the accompanying table describes the Switch Summary Screen.

SWITCH SUMMARY Access Control: READ/WRITE

Frames Transmitted

Frames Received

Frames Forwarded

Frames Filtered

Frames Dropped

Frames Errored

0 r. Refresh c. Clear x. Previous Menu

Enter Selection:

Figure 3-20. Switch Summary Screen

Field

Frames Transmitted

Frames Received

Frames Forwarded

Frames Filtered

Frames Dropped

Frames Errored

Selection

Refresh

Clear

Description

Total number of frames transmitted out all ports.

Total number of frames received on all ports.

Total number of frames forwarded through the switch.

Total number of frames filtered on all ports.

Total number of frames dropped by the switch due to lack of resources.

Total number of errored frames received from all ports.

Description

Refreshes switch summary statistics.

Clears (or sets to zero) switch summary statistics.

48 ELS100-24TXM User Interface ELS100-24TXM

Port Statistics Screen

The Port Statistics Screen allows you to display statistics for each port on the switch. Many of these statistics correspond to the Statistics group of

RMON. You can also refresh or clear the statistics. Select s from the

Switch Statistics Screen to view the Port Statistics screen. Figure 3-21 shows the Port Statistics Screen and the accompanying table describes the Port Statistics Screen.

PORT 1 STATISTICS Access Control: READ/WRITE

Frames Transmitted 0

Frames Received

Frames Forwarded

Frames Filtered

Frames Dropped

Broadcasts Transmitted 0

Broadcasts Received 0

Multicasts Transmitted 0

Multicasts Received

Bytes Transmitted

Bytes Received 0

Pause Frames Transmitted 0

Pause Frames Received 0

Collisions

Late Collisions

CRC/Alignment Errors

Undersized Frames

Oversized Frames

Fragments

Jabbers

64 Byte Frames

65 to 127 Byte Frames

128 to 255 Byte Frames

256 to 511 Byte Frames

512 to 1023 Byte Frames

1024 to 1518 Byte Frames

r. Refresh c. Clear x. Previous Menu

Enter Selection:

Figure 3-21. Port Statistics Screen

Field

Frames Transmitted

Frames Received

Frames Forwarded

Frames Filtered

Frames Dropped

Broadcasts Transmitted

Broadcasts Received

Description

Total number of frames transmitted on the port.

Total number of frames received on the port.

Total number of frames received on the port which were forwarded to other ports.

Total number of frames received on the port which were filtered.

Total number of frames received on the port which were dropped by the switch due to lack of resources.

Total number of broadcast frames transmitted on the port.

Total number of broadcast frames received on the port.

continued on next page

9032785 ELS100-24TXM User Interface 49

Field

Multicasts Transmitted

Multicasts Received

Description

Total number of multicast frames transmitted on the port.

Total number of multicast frames received on the port.

Bytes Transmitted

Bytes Received

Total number of bytes transmitted on the port.

Total number of bytes received on the port.

Pause Frames Transmitted Total number of flow control pause frames transmitted on the port.

Pause Frames Received Total number of flow control pause frames received on the port.

Collisions

Late Collisions

CRC/Alignment Errors

Undersized Frames

Oversized Frames

Fragments

Jabbers

64 Byte Frames

65 to 127 Byte Frames

Total number of collisions detected on the port.

Total number of late collisions detected on the port.

Total number of frames received on the port which had either a CRC or an alignment error.

Total number of frames received on the port which were undersized.

Total number of frames received on the port which were oversized.

Total number of frames received on the port which were fragments.

Total number of frames received on the port which were jabbers.

Total number of frames received and transmitted on the port which were 64 bytes in length.

Total number of frames received and transmitted on the port which were from 65 to 127 bytes in length.

128 to 255 Byte Frames Total number of frames received and transmitted on the port which were from 128 to 255 bytes in length.

256 to 511 Byte Frames

512 to 1023 Byte Frames

Total number of frames received and transmitted on the port which were from 256 to 511 bytes in length.

Total number of frames received and transmitted on the port which were from 512 to 1023 bytes in length.

1024 to 1518 Byte Frames Total number of frames received and transmitted on the port which were from 1024 to 1518 bytes in length.

Selection Description

Refresh

Clear

Refreshes port statistics.

Clears (or sets to zero) port statistics.

50 ELS100-24TXM User Interface ELS100-24TXM

General Information Screen

The General Information Screen allows you to view general system information. Select e from the Main Menu to view the General Information

Screen. Figure 3-22 shows the General Information Screen and the accompanying table describes the General Information Screen.

GENERAL INFORMATION Access Control: READ/WRITE

Software Version

Serial Number

Base MAC Address

Up Time(minutes)

Power Up Count

1.00

100

00c0ba000000

1 x. Previous Menu

Enter Selection:

Figure 3-22. General Information Screen

Field

Software Version

Serial Number

Base MAC Address

Up Time (minutes)

Power Up Count

Description

The version of system software currently operating on the switch.

The serial number of the switch.

The base MAC address of the switch (port 1 address).

The number of minutes the switch has been operational since the last power cycle or reset.

The number of times the system has powered up or been reset since the switch was originally shipped from the factory.

9032785 ELS100-24TXM User Interface 51

Download Software Menu

The Download Software Menu allows you to set up and initiate a software download. Select f from the Main Menu to view the Download Software

Menu. Figure 3-23 shows the Download Software Menu and the accompanying table describes the Download Software Menu.

DOWNLOAD SOFTWARE

a. TFTP Server IP Address

b. TFTP File Name

c. Start TFTP Download

d. Start XMODEM Download

x. Previous Menu

Enter Selection:

Access Control: READ/WRITE

1.2.3.4

Figure 3-23. Download Software Menu

Selection

TFTP Server IP Address

TFTP File Name

Start TFTP Download

Start XMODEM Download

Description

The IP address of the TFTP server.

The file name to be downloaded from the TFTP server

(maximum of 80 characters).

Starts a TFTP download using TFTP Server IP Address and TFTP File Name information.

Starts an XMODEM (serial) download.

52 ELS100-24TXM User Interface ELS100-24TXM

Save Current Configuration

The Save Current Configuration screen ensures that all changes made to the ELS100-24TXM switch via the console menus will be stored in the event of power outages or power cycles.

To save your current configuration, do the following:

Select g from the Main Menu to view the Save Current Configuration screen.

The following message prompt displays:

The current settings will become permanent.

All the saved settings will be lost!

a. OK x. Cancel and return to the Previous Menu

Select either a to confirm the process or x to cancel the process.

Return to Default Configuration

The Return to Default Configuration screen allows you to restore the original factory default switch settings before changes were made via the user interface or SNMP.

To return to default configuration settings, do the following:

Select h from the Main Menu to view the Return to Default

Configuration screen.

The following message prompt displays:

Switch will return to default settings.

All the current changes and settings will be lost!

a. OK x. Cancel and return to the Previous Menu

Select either a to confirm the process or x to cancel the process.

Logout

The Logout menu item allows you to log out of the user interface and return to the Login screen. Select i from the Main Menu to logout. After this command is entered, the system logout occurs automatically.

9032785 ELS100-24TXM User Interface 53

Reset

The Reset screen allows you to perform a switch hardware reset. You are first prompted as to whether or not to save the current switch configuration.

To reset the switch, do the following:

Select j from the Main Menu to view the Reset screen.

The following message prompt displays:

Switch will go through a hardware reset.

All the current changes that have not been saved will be lost!

a. Save changes and Reset b. Don’t save changes and Reset x. Cancel and return to the Previous Menu

Select either a or b to confirm the process or x to cancel the process.

54 ELS100-24TXM User Interface ELS100-24TXM

4. CONFIGURING & MONITORING THE SWITCH

Common Tasks

The switch console menus allow you to modify default switch settings and configure the switch for network management. They also allow you to monitor switch performance and status. See Section 3, “ELS100-24TXM

User Interface,” for an overview of the menu hierarchy and a description of all menus. The following sections describe common tasks in setting up and operating the ELS100-24TXM switch using the console menus.

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

• Setting password protection for the switch to prevent unauthorized access to console menus

• Assigning an IP address for the switch if you plan to manage the switch using SNMP, or if you use Telnet to access the switch

• Checking network configuration status and verifying that network connections are correct

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

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

• Setting SNMP parameters for management access

• Viewing switch statistics to monitor and evaluate switch performance and traffic patterns on the network

• Configuring port mirroring

• Downloading a software upgrade

• Configuring Spanning Tree parameters

• Configuring VLANs

• Configuring Class of Service

• Configuring port operation (enable/disable, port speed, full/half duplex and flow control)

• Configuring the forwarding table

• Configuring the broadcast cutoff rate

• Setting a default gateway

• Configuring BootP/DHCP

9032785 Configuring & Monitoring the Switch 55

Setting Password Protection

The ELS100-24TXM switch is factory-configured with access rights to the console menus set to READ/WRITE. This setting allows anyone to use the console menus to modify any operational parameter. To protect the configuration of the switch from unauthorized modification, you should enable password protection to the console menus.

To enter a password, do the following:

Select Password from the System Configuration Menu and press

[Enter].

Enter a password containing six to eight alphanumeric characters.

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

By factory default, there is no password configured. This means that at the login: prompt, all you have to do is press [Enter] to gain READ/

WRITE access to the console menus. When you configure the password parameter, the factory default setting is deactivated and the new password governs access to the console menus.

After you enter a password and logout using the Logout command from the Main Menu, all access rights change to READ-ONLY. The current level of access control is indicated at the top of the management screen.

If you forget your password, contact your Cabletron Systems Support

Representative.

You are automatically logged out from the console menus based on the Screen Timeout setting in the System Configuration Menu. A setting of “0” permits the console menus to remain available indefinitely.

56 Configuring & Monitoring the Switch ELS100-24TXM

Assigning an IP Address

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

Select System Configuration Menu from the Main menu.

Select IP address from the menu and enter the IP address. Press

[Enter].

The IP address is now programmed. The subnet mask is automatically set to correspond to the class of the address entered. If a different mask is used on the network, select Subnet Mask from the menu and enter the appropriate mask.

Checking Network Configuration Status

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

Select Port Menu from the Main Menu.

If a network cable is properly connected to a port, the Link Status for the port reads CONNECTED. If no cable is connected to the port, or if the cable or port is faulty, the Link Status for the port reads DIS-

CONNECTED.

If you see a DISCONNECTED status for a connected port, plug the cable into another port on the switch or try another cable.

Connecting via Telnet

You can connect to the ELS100-24TXM switch from a remote location using the Telnet application. This application allows you to establish inband access to the console menus.

To connect to the ELS100-24TXM switch via Telnet, do the following:

Assign an IP address using the System Configuration Menu.

Set a password using the System Configuration Menu.

IP address and the password.

9032785 Configuring & Monitoring the Switch 57

Setting SNMP Management Access

Access to the ELS100-24TXM switch through SNMP is controlled by community names. The community names set for the switch must match those used by the SNMP management station for successful communication to occur. The switch uses two community names. The

“Public” community name allows read-only access to the device via

SNMP. The “Private” community name allows read/write access.

The ELS100-24TXM switch can send SNMP messages called traps to

SNMP management stations when an important event occurs with the switch. The switch allows up to four destinations to be configured for these trap messages to be sent.

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

Select System Configuration Menu from the Main Menu.

Select SNMP Configuration Menu.

Select SNMP Private Community Name from the menu and enter the desired read/write access community name (you are permitted to enter from one to 10 characters).

Select SNMP Public Community Name and enter the desired readonly community name (you are permitted to enter from one to 10 characters).

Select one or more Trap Destination entries from the menu and enter the appropriate IP addresses.

For each trap destination entered, a corresponding community name should be entered.

Viewing Switch Statistics

To view switch statistics, do the following:

Select Switch Statistics Screen from the Main Menu.

The screen lists the main statistical counts for all ports on the switch simultaneously.

Select Switch Summary from the Switch Statistics Screen.

The screen lists a summary of sum total statistics for all ports on the switch.

Select Port Statistics from the Switch Statistics Screen.

Enter the port number. Press [Enter].

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

On any of the statistics screens, select Clear to clear (zero) the displayed statistical counts and Refresh to refresh (update) the displayed statistical counts.

58 Configuring & Monitoring the Switch ELS100-24TXM

Configuring Port Mirroring

You can mirror the traffic being switched on any port for the purposes of network traffic analysis and connection assurance. When Port Mirroring is enabled, one port in each group of eight becomes a monitor port for any one of the other ports within the group. The two ports must be operating at the same speed.

To configure port mirroring, do the following:

Select Switch Configuration Menu from the Main Menu.

Turn the switch port mirroring operation on or off by toggling the Port

Mirroring Enable option (pressing g).

Select Mirrored Port for the port to be mirrored (traffic information source) and enter the number of the port. Press [Enter].

Select Transmit Data Mirror Enable to mirror the data being transmitted out the mirrored port to the mirroring port. Alternatively, select Receive Data Mirror Enable to mirror the data being received on the mirrored port to the mirroring port. Only one of these parameters can be enabled at a given time.

Connect a traffic analyzer or RMON probe to the mirroring port.

Downloading a Software Upgrade

You can upgrade the operational software in the ELS100-24TXM switch without physically opening the switch or being in the same location. The software storage sector in the flash memory of the switch is reprogrammable, allowing you to easily download software feature enhancements and problem fixes to the switch from a local or remote location.

Software can be downloaded to the switch in two ways:

• Via the serial port. This procedure is an out-of-band operation that copies the software through the serial port to the switch. This operation takes approximately 10 minutes and requires minimal configuration.

• Via TFTP download. This procedure uses a TFTP server connected to the network and downloads the software using the TFTP protocol.

A TFTP download is much faster than a serial download, requiring only a few seconds, and can be used to upgrade an ELS100-24TXM switch that is not physically proximate. The disadvantage is that this method requires a TFTP server and additional setup.

9032785 Configuring & Monitoring the Switch 59

Downloading Via the Serial Port

A serial download is the easiest method to upgrade the ELS100-24TXM switch software, requiring the least amount of equipment and configuration.

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

Select Download Software Menu from the Main Menu.

Select Start XMODEM Download.

The following message prompt displays:

Software downloader is running.

Software downloader request: Please start XMODEM transfer (9600, N, 1).(Please ignore any characters that may appear on the next line).

Send the file using the XMODEM protocol from your computer application (the procedure varies depending upon the application used).

When the XMODEM procedure finishes, the following message prompt displays:

Software download successfully completed XMODEM download. Please wait while program flash is being written. Software downloader is exiting after successful download to flash. Please wait while system initializes.

The system software will reinitialize and display the login prompt.

Downloading Via TFTP

To perform a TFTP download, you must first configure the

ELS100-24TXM switch. This consists of programming the switch with an

IP address, if this has not already been done, and entering the IP address of the TFTP server and the name of the upgrade file. To program the switch IP address, go to the System Configuration Menu which is accessible from the Main Menu screen.

To download switch software via TFTP, do the following:

Select TFTP Server IP Address from the Download Software Menu.

Enter the TFTP server IP address and press [Enter].

Select TFTP File Name and enter the file name to be downloaded from the TFTP server.

For a TFTP download, the path to the file must be included in its name. For example, if the upgrade file name is filename.bin and it resides in the directory / usr/tftp on the TFTP server, then you must enter the

TFTP file name as: “/usr/tftp/filename.bin”.

60 Configuring & Monitoring the Switch ELS100-24TXM

If necessary, configure the address of an IP gateway to reach the server from the switch using the Default Gateway field on the System

Configuration Menu.

Configure the TFTP server by copying the download file from the upgrade disk to an appropriate directory and starting the server.

Select Start TFTP Download and press [Enter].

To verify that the TFTP download has been successfully completed, note the software version level displayed on the General Information screen accessible from the Main Menu. This number should match the version number that appears on the upgrade disk.

Configuring Spanning Tree Parameters

The ELS100-24TXM switch supports the IEEE 802.1D Spanning Tree

Protocol. This protocol allows redundant connections to be created between LAN segments for purposes of fault tolerance. Two or more physical paths between different segments can be created through the switch, with the Spanning Tree Protocol choosing a single path at any given time and disabling all others.

If the chosen path fails for any reason, a disabled alternative is activated, thereby maintaining the connection. See Appendix B, “Spanning Tree

Concepts,” for further information on using the Spanning Tree Protocol in a network.

Configuring Spanning Tree parameters from their default can cause serious deterioration of network performance.

To configure Spanning Tree Parameters, do the following:

Select Switch Configuration Menu from the Main Menu.

Select Spanning Tree Configuration Menu.

Turn the switch Spanning Tree operation on or off by toggling the

Spanning Tree Protocol Enable option by pressing a.

Select Port Configuration.

The Spanning Tree Port Configuration Menu displays. Change the parameters that display in this menu as required.

9032785 Configuring & Monitoring the Switch 61

Configuring VLANs

A virtual LAN (VLAN) is a group of devices on one or more LANs that are configured such that they can communicate as if they were attached to the same wire. Because VLANs are based on logical instead of physical connections, they are extremely flexible.

The most fundamental benefit of VLAN technology is the ability to create workgroups based on function rather than on physical location or media.

For further information, see Appendix D, “Virtual LANs (VLANs).”

To configure VLANs, do the following:

Select Switch Configuration Menu from the Main Menu.

Select VLAN Configuration Menu.

Turn the global switch VLAN operation on or off by toggling the VLAN

Enable option by pressing a.

Select VLAN Menu.

The VLAN Menu displays. This menu displays the current configuration of VLANs in the system.

To delete a current VLAN, select Delete, then enter the number of the

VLAN.

To configure a VLAN, select Configure and enter a VLAN number. A new VLAN can be created this way.

The VLAN #n Configuration Menu displays. From this menu, you can configure VLAN names, add/delete ports in a VLAN, and add/delete egress ports for a VLAN.

From the main VLAN Configuration Menu, select VLAN Port Menu to configure the VLAN port mode (hybrid or access) for individual ports.

Configuring Class of Service

You can configure Class of Service parameters using the Class of Service

Configuration Menu. This menu permits you to configure priority levels to traffic being forwarded through the switch. During periods of congestion,

Class of Service settings ensure that traffic which has been assigned high priority is forwarded through the switch ahead of normal priority traffic. For further information, see Appendix E, “Class of Service.”

62 Configuring & Monitoring the Switch ELS100-24TXM

To configure Class of Service, do the following:

Select Class of Service Configuration Menu from the Switch

Configuration Menu.

Turn the global switch Class of Service operation on or off by toggling the Class of Service Enable option by pressing a.

Select Priority Threshold and type a number between 0 and 7.

Select Configure Port Priority.

The Port Priority Menu displays. From this menu, individual port priority levels can be configured.

Configuring Port Operation

You can configure switch ports for operational parameters such as autonegotiation, duplex mode, port speed and flow control. The fiber ports always operate in full duplex mode and 100Mbps speed. Therefore, these two parameters, along with auto-negotiation, are not configurable on fiber ports.

To configure port operation, do the following:

Select Port Menu from the Main Menu.

Select Configure and enter an individual port number or multiple port numbers. Press [Enter].

Examples: You can configure an individual port or multiple ports, separated by commas or hyphens, in either:

a list: ports 1, 3, 5, 7

a range: ports 6-9

or a combination of both: 1, 3, 5, 7, 10-15, 21, 23

The port number(s) entered displays on the top of the Port Configuration screen.

Select Port Name and enter a Port Name. Press [Enter].

Select Port Enable to toggle between enabling (Yes) and disabling

(No) the port(s).

Select Flow Control Enable to toggle between enabling (Yes) or disabling (No) flow control on the port(s).

Select Auto-negotiation Enable to toggle between enabling (Yes) or disabling (No) auto-negotiation on the port.

9032785 Configuring & Monitoring the Switch 63

If Auto-negotiation Enable is set to No, the Full Duplex and Port Speed modes need to be configured.

If Auto-negotiation Enable is set to Yes, the Full Duplex and Port Speed fields disappear and the system automatically configures these functions.

Select Full Duplex to toggle between Yes (Full Duplex) and No (Half

Duplex) mode on the port(s).

Select Port Speed to toggle between 10Mbps and 100Mbps speeds on the port(s).

Configuring the Forwarding Table

The Forwarding Table allows you to designate forwarding treatment through the switch for specific MAC addresses, allowing you to maintain the efficiency and security of your network. You can search for specific

MAC addresses by the address itself or by port number. The switch learns addresses dynamically from incoming packets and builds a table of these addresses along with their associated ports. There are three types of

MAC addresses in the forwarding table:

• Dynamic MAC addresses, which are dynamically learned and removed by the switch based on a time period defined using the

Forwarding Table Aging Time option in the Switch Configuration

Menu.

• Static MAC addresses, which are entered manually, stored in nonvolatile memory and automatically placed in the forwarding table.

• System MAC addresses, which are set by the system software and cannot be modified. Each switch port has a permanent system MAC address assigned to it.

There are three types of dispositions associated with each address in the forwarding table:

• Forward, which directs packets destined for a specific MAC address to a specific port.

• Discard, which drops packets destined for a specific MAC address

(and thus provides a security function by blocking certain packets).

• Local, which is for packets destined for the switch itself (such as a

“local” SNMP management packet).

To configure the forwarding table, do the following:

Select Switch Configuration Menu from the Main Menu.

Select Forwarding Table Configuration Menu.

64 Configuring & Monitoring the Switch ELS100-24TXM

To either make an existing dynamic entry static (Make Entry Static) or delete a static entry (Delete Static Entry), do the following:

Select the letter associated with the option.

The following message prompt displays:

Enter MAC Address:

Enter the MAC address. Press [Enter].

To either add a static entry (Add Static Entry) or modify a static entry

(Modify Static Entry), do the following:

Select the letter associated with the option.

The following message prompt displays:

Enter MAC Address:

Enter the MAC address. Press [Enter].

The following message prompt displays:

Forward to Port (Y/N):

Do one of the following:

If you select “Y” and Press [Enter], the system displays:

Enter Port Number (1-24):

Enter the port number. Press [Enter].

If you select “N” and press [Enter], the system displays “discard” in the Disposition field.

Configuring Broadcast Cutoff Rate

This setting affects the throttling of excessive broadcast or unicast packets with unknown MAC addresses being handled by the switch.

Normally, when these types of packets are received by the switch, they are forwarded (flooded) to every port on the switch or on a VLAN.

However, if the receiving rate of these packets exceeds the broadcast cutoff rate, the switch will throttle back or limit the forwarding of these packets based on the configured Broadcast Cutoff Rate. This mechanism helps to prevent broadcast storms, a problem often encountered in

Ethernet networks.

To configure the broadcast cutoff rate, do the following:

Select Switch Configuration Menu from the Main Menu.

Select Broadcast Cutoff Rate, enter the rate value, and press [Enter].

Valid values are in the range from 100 to 500,000 per second. This rate value is applied to each grouping of 8 ports on the switch. A setting of 500,000 essentially disables this feature.

9032785 Configuring & Monitoring the Switch 65

Setting a Default Gateway

The Default Gateway parameter defines the IP address of a router or other network device to which IP packets are to be sent if destined for a subnet outside of that which the switch is operating.

To set a default gateway, do the following:

Select System Configuration Menu from the Main Menu.

Select Default Gateway.

Enter the gateway IP address. Press [Enter].

Configuring BootP/DHCP

The DHCP and BootP protocols allow you to automatically configure the switch’s IP address information. Enabling this feature greatly speeds up device configuration, especially when a large number of devices are installed.

A DHCP and/or BootP server must be operating on the network and be properly configured for this option to work. When this option is enabled, the switch first tries to obtain an IP address from a DHCP server. If this fails, the switch tries to obtain an IP address from a BootP server. If this fails, the switch uses a previously configured IP address, if one exists.

To configure BootP/DHCP, do the following:

Select System Configuration Menu from the Main Menu.

Select BootP/DHCP Enable.

This selection toggles between Enable and Disable.

66 Configuring & Monitoring the Switch ELS100-24TXM

5. SNMP MANAGEMENT

The SNMP Protocol

SNMP (Simple Network Management Protocol) is a communication protocol designed specifically for the purpose of managing devices or other elements on a network. Network equipment commonly managed with SNMP includes hubs, switches, routers, and host computers. SNMP is typically used to configure these types of devices for proper operation in their network environment, as well as to monitor them to evaluate their performance and detect potential problems.

Managed entities supporting SNMP typically contain software, which runs locally on the device and is referred to as an agent. In Figure 5-1, software in an ELS100-24TXM switch functions as an agent, monitoring and controlling the functionality of the switch.

Figure 5-1. ELS100-24TXM Switches Managed by an SNMP Management

Workstation

A defined set of variables, referred to as managed objects, is maintained by the agent and used to manage the device. These objects are defined in a Management Information Base (MIB) which allows for a standard presentation of the information controlled by the agent over the network.

The software used to access the information maintained by the SNMP agents across a network is referred to as the SNMP Manager, and typically runs on a workstation.

The SNMP manager software uses a MIB specification, equivalent to that which the agent maintains, to read and write objects controlled by the agent for purposes of configuring and monitoring the device. SNMP defines the format of the MIB specifications and the protocol used to access this information.

9032785 SNMP Management 67

There are three main operations defined in SNMP:

• Operations that read information from the managed device, such as those used to obtain status or statistical data, are called GET operations.

• Operations that change a functional parameter on the device, such as those used to configure Spanning Tree or to initiate a software download, are referred to as SET operations. GET and SET operations are initiated only by the manager software, and result in a response by the agent.

• The third operation type, the TRAP, allows the agent to send an unsolicited message to the manager. This operation is typically used as an alert of a potential problem or a change of status with the device. The Trap Destination parameter in the SNMP Configuration

Menu is used to configure the IP addresses of the SNMP Manager to which ELS100-24TXM trap messages are sent.

MIB Objects

A number of standard MIB specifications have been defined for managing network equipment. SNMP compliant devices typically support one or more standard MIBs defined by the Internet Engineering Task Force

(IETF), in the form of Request for Comments (RFC) documents.

These MIBs provide a common method of managing devices, such as switches and hubs, and network interfaces, such as Ethernet and token ring. The primary standard MIB, referred to as MIB-II, provides an overall view of the managed agent and must be supported, at least in part, by all

SNMP agents. In addition, proprietary MIB extensions are defined by commercial vendors for managing device-specific functions of their products.

The ELS100-24TXM switch supports four standard MIBs:

• RFC 1213 - Management Information Base for Network

Management of TCP/IP based Internets (MIB-II)

• RFC 1398 - Definitions of Managed Objects for the Ethernet-like

Interface Types (Ethernet MIB)

• RFC 1493 - Definitions of Managed Objects for Bridges

• RFC 1757 - Remote Network Monitoring Management Information

Base

The ELS100-24TXM switch also supports Cabletron Systems proprietary

MIB extensions.

RFC 1213 (MIB-II)

RFC 1213 provides management of switch system-level parameters, including TCP/IP protocol-related statistics, IP addressing, routing table information, and interface statistics for each switch port. MIB-II is the standard MIB defined by RFC 1213. All agent devices operating SNMP are required to support at least part of MIB-II.

68 SNMP Management ELS100-24TXM

9032785

This MIB reports information about the protocols and network interfaces supported on the agent itself, as well as other general information. The

MIB is divided into a number of groups, each of which corresponds to a specific protocol or set of information. Some groups are defined in other

RFC documents.

The groups specifically defined in RFC 1213 and supported by the

ELS100-24TXM switch system software are as follows:

• System – General information about the agent system

• Interfaces – Information about the network interfaces of the system

• Address Translation – Interface address information, both MAC level and network (IP) level

• IP – Statistics and information related to the IP protocol

• ICMP – Statistics and information related to the ICMP protocol

• TCP – Statistics and information related to the TCP protocol

• UDP – Statistics and information related to the UDP protocol

• Transmission – Statistics and information related to the physical network medium to which the system interfaces (e.g. Ethernet, token ring, etc.).

• SNMP – Statistics and information related to the SNMP protocol

RFC 1398 (Ethernet MIB)

RFC 1398 provides management and monitoring for the Ethernet-specific aspects of each port on the switch. This is the Ethernet-specific statistics subgroup of the MIB-II Transmission group. This group provides a set of statistics related to Ethernet’s physical level operation. Specifically, error and collision-related statistics are presented.

RFC 1493 (Bridge MIB)

RFC 1493 is a group defined under MIB-II. This MIB deals with the operation of the system as an 802.1D-compliant bridge. Areas of functionality supported by this group include Spanning Tree and forwarding table information and configuration.

RFC 1757 (RMON MIB)

RFC 1757 is a group defined under MIB-II. This MIB provides management for the RMON aspects of the switch. The ELS100-24TXM switch supports four of the nine groups of RMON defined for Ethernet networks on a per port basis. For further information, see the subsection

“RMON” in Chapter 1.

SNMP Management 69

Cabletron Systems Proprietary MIB Extensions

Areas of ELS100-24TXM switch functionality not covered by the standard

RFC MIBs are specified in the Cabletron Systems private MIB. This MIB definition is specified separately from MIB-II. Areas covered in this MIB include various system, switch, and port level information. System information MIB variables are shown in Table 5-1, switch information variables in Table 5-2, and port variables in Table 5-3.

70 SNMP Management ELS100-24TXM

Variable

SerialNo

TftpIpAddress

TftpFilename

PowerUpCount

GatewayIPAddress

TftpStartDownload

BootpDhcpEnable

Reset

Table 5-1. System Information Variables

BroadcastCutoffRate

Description

Serial number of the unit.

TFTP server IP address for TFTP downloads.

Filename of the download upgrade file on the TFTP server.

Cumulative number of times switch has powered up or been reset.

Per second rate past which broadcast and destination unknown unicast frames are not flooded on each group of 8 ports on the switch.

IP address of the default gateway (router) to which packets destined for another subnet are sent.

Start TFTP downloads via SNMP, using TftpIpAddress and

TftpFilename.

Enable/disable BootP/DHCP for IP address configuration.

Remotely execute a software reset of the switch.

Table 5-2. Switch Information Variables

Variable

SwitchIpAddress

Description

IP address of the switch, used for management.

Subnet mask corresponding to the SwitchIPAddress.

SwitchSubnetMask

ActiveAgingTime Aging tick period in seconds by which addresses in the forwarding table are aged out.

Enable/disable operation of Spanning Tree on the switch.

SwitchStpStatus

SwitchManager

SwitchTrapRcvr1

List of SNMP trap manager IP addresses.

SNMP trap manager IP address #1.

SwitchTrapCommunity1 SNMP community associated with trap manager IP address

#1.

SwitchTrapRcvr2 SNMP trap manager IP address #2.

SwitchTrapCommunity2 SNMP community associated with trap manager IP address

#2.

SwitchTrapRcvr3 SNMP trap manager IP address #3.

SwitchTrapCommunity3 SNMP community associated with trap manager IP address

#3.

SwitchTrapRcvr4 SNMP trap manager IP address #4.

SwitchTrapCommunity4 SNMP community associated with trap manager IP address

#4.

SwitchPortMirroringStatus

Enable/disable port mirroring operation of the switch.

9032785 continued on next page

SNMP Management 71

Table 5-2 Switch Information Variables (continued)

Variable

SwitchMirroredPort

SwitchMirroringPort

SwitchXmitMirrorEnable

SwitchRcvMirrorEnable

SwitchVlanEnable

SwitchVlanConfigTable

SwitchVlanId

SwitchVlanName

SwitchVlanPorts

SwitchVlanStatus

SwitchVlanEgressPorts

SwitchVlanStatus

SwitchVlanPortTable

SwitchVlanPortId

SwitchVlanPvid

SwitchVlanPortType

SwitchPriorityEnable

SwitchPriorityThreshold

SwitchPriorityPortTable

SwitchPriorityPortId

SwitchPriorityDefault

Description

Port to be mirrored from.

Port to be mirroring to.

Enable/disable mirroring of transmitted traffic out of the mirrored port to the mirroring port.

Enable/disable mirroring of received traffic into the mirrored port to the mirroring port.

Enable/disable global VLAN operation of switch.

Table indexed by SwitchVlanId

VLAN number or ID.

Text string for VLAN name.

Ports in the VLAN.

Variable used to add or delete entries from the VlanConfig-

Table.

Ports to which traffic destined for this VLAN may be transmitted.

Variable used to add or delete entries from the VlanConfig-

Table.

Table indexed by SwitchVlanPortId.

Port number or ID.

Port VLAN ID (PVID) for this port.

The type of VLAN this port is operating as, either hybrid or access.

Enable/disable global traffic priority in the switch.

Priority threshold level (0-7) in the switch which defines switch traffic to be high or low priority.

Priority table indexed by SwitchPriorityPortId.

Port number or ID.

Priority level (0-7) assigned to untagged traffic entering the associated port.

72 SNMP Management ELS100-24TXM

Variable

PortId

PortStatus

PortDuplexStatus

PortName

PortEnable

PortSpeed

PortAutonegEnable

PortFlowControlEnable

PortType

Table 5-3. Port Variables

Description

Port number or ID.

Link status of the port.

Full/half duplex setting of the port. Not configurable if autonegotiation is enabled.

Text name assigned to the port.

Enable/disable status of the port.

Speed the port is operating at. Not configurable if auto-negotiation is enabled.

Enable/disable auto-negotiation on the port.

Enable/disable flow control on the port.

The type of port, either: 10Base-T, 100Base-TX, 100Base-

FX.

Compiling MIB Extensions: Cabletron Website

The MIBs supported by the ELS100-24TXM switch must be compiled into the SNMP network management platform before the switch can be managed. The supported MIBs are available via the Internet at the following address: ftp://134.141.197.25/pub/snmp/mibs/enterprise file name: ctELS100-NG-mib.txt

The four standard MIB specifications listed above with which the

ELS100-24TXM switch is compliant are generally available with the

SNMP management platform.

Application modules specific to managing the ELS100-24TXM switch under different network management platforms are available. Contact

Cabletron Systems for information regarding supported platforms. If you require assistance, contact the Cabletron Systems Global Support Center directly at either:

(603) 337-3219 or

(603) 332-9400

9032785 SNMP Management 73

APPENDIX A. TECHNICAL SPECIFICATIONS

General

Standards Compliance

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

IEEE 802.1p Traffic Class Expediting and Dynamic Multicast Filtering

IEEE 802.1Q Virtual Bridged Local Area Networks

IEEE 802.2 Local Area Networks, Logical Link Control (LLC)

IEEE 802.3 CSMA/CD 9 (ISO/IEC 8802-3)

IEEE 802.3i 10Base-T (ISO/IEC 8802-3, clause 14)

IEEE 802.3u 100Base-TX (ISO/IEC 8802-3, clause 25)

IEEE 802.3u 100Base-FX

IEEE 802.3x Flow Control

EIA RS-232C (DTE-to-DCE)

EIA RS-310C (19” rackmount)

Certification

Emissions: FCC Part 15, Subparts A and B, Class A; EN55022 (CISPR

22), Class A; VCCI, Class A

Safety: UL 1950, CUL 1950 B (CSA); IEC 950 (TUV)

CE Mark: 89/336/EEC; 93/68/EEC; 73/23/EEC

Immunity: IEC 801-2; IEC 801-3; IEC 801-4

Data Rate

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

Environmental Specifications

Operating temperature:

Operating humidity:

Storage temperature:

Storage humidity:

to 113

F ( 0

C to 45

5 to 95% relative, non-condensing

-22

to 158

F (-30

C to 70

5 to 95% relative, non-condensing

9032785 Technical Specifications 75

Electrical Specifications

Input voltage:

Input frequency:

Maximum power consumption:

Physical

Height:

Length:

Width:

Weight:

Microprocessor

Type:

Speed:

Memory

Processor DRAM:

Packet Buffer Memory:

Flash Memory:

100-240 VAC

50-60 Hz

75 VA

1.75 in. (4.4 cm)

16.0 in. (40.6 cm)

17.1 in. (43.4 cm mountable in a standard 19 in. rack)

10.5 lb. (4.8 kg)

Intel i960J series, 32 bit

33 MHz

4 MB

4 MB/8 ports

2 MB

76 Technical Specifications ELS100-24TXM

Port Specifications

Console Port

Table A-1 shows the console port pin assignments.

Table A-1. RS-232 Console Port Pin Assignments

Signal Name

RTS/CTS

TXD

RXD

DSR

Ground

DTR

DCD

Not used

10Base-T and 100Base-TX Ports

The ELS100-24TXM switch provides IEEE 802.3u auto-negotiation on its

10Base-T/100Base-TX ports for 10/100 speed and full/half duplex operation. Table A-2 shows the 10Base-T/100Base-TX pinouts. These ports are wired MDI-X. All undefined pins are not used.

Table A-2. 10Base-T/100Base-TX Pinouts

Pin

MDI-X Signal Name

RD+

RD-

TD+

TD-

9032785 Technical Specifications 77

MDI/MDI-X Crossover Cable Wiring

Figure A-1 shows the wiring scheme for implementing a crossover cable if needed for connection to the switch’s 10Base-T or 100Base-TX ports.

Such a cable may be required when connecting the switch to another switch or a hub device.

Figure A-1. External Crossover Cable Wiring

Power Cord Set Requirements

The wide-range input feature of the ELS100-24TXM Ethernet switch permits it to operate from any line voltage between 100 and 120 or 200 and 240 VAC.

The power cord set (appliance coupler, flexible cord, and wall plug) you received with the switch meets the requirements for use in the country where you purchased the switch.

Power cord sets for use in other countries must meet the requirements of the country where you use the switch. For more information on power cord set requirements, contact your Cabletron Systems Support

Representative.

General Requirements

The requirements listed below are applicable to all countries:

• The length of the power cord set must be at least 5.00 feet (1.5 m) and a maximum of 6.56 feet (2.0 m).

• All power cord sets must be approved by an acceptable accredited agency responsible for evaluation in the country where the power cord set will be used.

• The power cord set must have a minimum current capacity of 10A and a nominal voltage rating of 125 or 250 VAC, as required by each country’s power system.

• The appliance coupler must meet the mechanical configuration of an

EN 60 320/IEC 320 Standard Sheet C13 connector for mating with appliance inlet on the switch.

78 Technical Specifications ELS100-24TXM

Country-Specific Requirements

Table A-3 lists the power cord set requirements by country and identifies the accredited agency within that country.

Table A-3. Power Cord Set Requirements by Country

Country

Australia

Austria

Belgium

Canada

Denmark

Finland

France

Accredited Agency

EANSW

OVE

CEBC

CSA

DEMKO

FIMKO

UTE

See Notes *

Germany

Italy

Japan

Netherlands

Norway

Sweden

Switzerland

United Kingdom

VDE

IMQ

JIS

KEMA

NEMKO

SEMKO

SEV

BSI

United States UL 2

* The note column includes a number. Associate this number with the corresponding notes listed after the table to obtain specific power standards and requirements.

NOTE 1

Flexible cord must be <HAR> Type HO5VV-F or HO3VV-F, 3-conductor,

1.0 mm

, or 0.75 mm

conductor size. Power cord set fittings (appliance coupler and wall plug) must bear the certification mark of the agency responsible for evaluation in the country where it will be used.

NOTE 2

Flexible cord must be Type SV, SJ, SPT or equivalent, No. 18 AWG, 3conductor. Wall plug must be a two-pole grounding type with a NEMA 5-

15P (15A, 125V) or NEMA 6-15P (15A 250V) configuration.

NOTE 3

Appliance coupler, flexible cord, and wall plug must bear a "T" mark and registration number in accordance with the Japanese Dentori Law.

Flexible cord must be Type VCT or VCTF, 3-conductor, 0.75mm2 conductor size. Wall plug must be a two-pole grounding type with a

Japanese Industrial Standard C8303 (15A, 125V) configuration.

9032785 Technical Specifications 79

APPENDIX B. SPANNING TREE CONCEPTS

General

The IEEE 802.1D Spanning Tree Protocol resolves the problems of physical loops in a network by establishing one primary path between any two switches in a network. Any duplicate paths are barred from use and become standby or blocked paths until the original path fails, at which point they can be brought into service.

Spanning Tree Features

The ELS100-24TXM switch meets the requirements of the Spanning Tree

Protocol (STP) by performing the following functions:

• Creates a single spanning tree from any arrangement of switching or bridging elements.

The term “switch” is used as an equivalent to

“bridge” in this document.

• Compensates automatically for the failure, removal, or addition of any device in an active data path.

• Achieves port changes in short time intervals, which establishes a stable active topology quickly with a minimum of network disturbance.

• Uses a minimum amount of communications bandwidth to accomplish the operation of the Spanning Tree Protocol.

• Reconfigures the active topology in a manner that is transparent to stations transmitting and receiving data packets.

• Manages the topology in a consistent and reproducible manner through the use of Spanning Tree Protocol parameters.

9032785 Spanning Tree Concepts 81

Spanning Tree Protocol in a Network

Figure B-1 illustrates the use of three ELS100-24TXM switches to establish an effective Spanning Tree configuration. Switches A, B and C are connected together in a redundant topology (more than one path between two points). If the connection between A and B goes down, the link between A and C becomes active, thereby establishing a path between A and B through switch C. Additionally, if the connection between B and C goes down, the link between A and C becomes active, establishing a path between B and C through switch A.

Figure B-1. Spanning Tree Using ELS100-24TXM Switches

82 Spanning Tree Concepts ELS100-24TXM

Spanning Tree Protocol Parameters

Several configuration parameters control the operation of the Spanning

Tree Protocol. Table B-1 describes the parameters and lists the

ELS100-24TXM switch default settings for each parameter.

You can cause serious network performance degradation if you do not fully understand Spanning Tree concepts.

Be sure to consult personnel experienced with this process prior to configuring Spanning Tree parameters.

Parameter

Bridge

Group

Address

Bridge Identifier

Table B-1. Spanning Tree Protocol Defaults

Description

Unique MAC group address, recognized by all bridges in the network.

Default Value

Port Identifier

Port Priority

Cost Component of Each

Port

Identifier for each bridge. This parameter consists of two parts: a 16-bit bridge priority and a 48-bit network adapter address. Ports are numbered in absolute numbers starting from 1 regardless of their bridge attachment. The network adapter address is the same address as the first port of the bridge.

Identifies each port of each bridge, with an incremental default value given for each port.

Port 1 -32768 Port 9 -32776 Port 17 -32784

Port 2 -32769 Port 10 -32777 Port 18 -32785

Port 3 -32770

Port 4 -32771

Port 5 -32772

Port 11 -32778

Port 12 -32779

Port 13 -32780

Port 19 -32786

Port 20 -32787

Port 21 -32788

Port 6 -32773

Port 7 -32774

Port 14 -32781 Port 22 -32789

Port 15 -32782 Port 23 -32790

Port 8 -32775 Port 16 -32783 Port 24 -32791

Indicates the priority of a specific port in relation to other ports.

The Spanning Tree Protocol calculates and ensures that an active topology generates minimal cost paths.

A value of 100 is generally used for 10Mbps Ethernet networks and a value of 10 is generally used for

100Mbps Ethernet networks.

32768 (bridge priority)

128

For detailed information on the operation of the Spanning Tree Protocol, consult Section 4 of IEEE Standard 802.1D, ISO/IEC 10038:1993.

9032785 Spanning Tree Concepts 83

Spanning Tree Protocol Operation

When the Spanning Tree Protocol is enabled for the first time or when there is a change in the network topology, such as a failure or the addition or removal of a component, the Spanning Tree Protocol automatically sets up the active topology of the current network.

Communicating Between Bridges

Periodically, all devices running the Spanning Tree Protocol on a network transmit packets to each other “in care of” the Bridge Group Address which all bridges share. When a bridge receives a frame sent to the

Bridge Group Address, the bridge’s Spanning Tree Protocol processes the packet. Application software and other LAN segments ignore the packet. Bridges communicate between each other in order to determine the Root Bridge.

Selecting a Root Bridge and Designated Bridges

During communication between bridges, one bridge is determined to have the lowest bridge identifier. This bridge becomes the Root Bridge.

After the Root Bridge has been selected, each LAN segment looks for the bridge that has the lowest cost relative to the Root Bridge. These bridges become Designated Bridges.

Selecting Designated Ports

Each Designated Bridge selects a Designated Port. This port is responsible for forwarding packets to the Root Bridge.

Handling Duplicate Paths

When the active topology of the network is determined, all packets between any two nodes in the network use only one path. Where a duplicate path exists, the non-designated port is put into a blocking state.

Remapping Network Topology

If there is a change in the network topology due to a failure or the removal or addition of any active components, the active topology also changes.

This may trigger a change in the state of some blocked ports.

84 Spanning Tree Concepts ELS100-24TXM

There are five (5) states that the ports can be in for spanning tree:

• Blocking: A port in this state does not participate in the transmission of frames, thus preventing duplication arising through multiple paths existing in the active topology of the bridged LAN.

• Listening: A port in this state is preparing to participate in the transmission of frames. The transmission of frames is temporarily disabled in order to prevent temporary loops, which may occur in a bridged LAN during the lifetime of this state as the active topology of the bridged LAN changes.

• Learning: A port in this state is preparing to participate in the transmission of frames.

• Forwarding: A port in this state is participating in the transmission of frames.

• Disabled: A port in this state does not participate in the transmission of frames or the operation of the spanning tree process.

9032785 Spanning Tree Concepts 85

APPENDIX C. FLOW CONTROL

Flow control is a mechanism which allows you to protect the switch from overload conditions and to keep additional traffic off the network when excessive congestion will result. Figure C-1 illustrates flow control for both half and full duplex applications.

9032785

Figure C-1. Flow Control for Full and Half Duplex Applications

Each port of the switch has a transmit queue which buffers frames to be sent out on that port. In this example, large amounts of data are being sent from Workstation A (connected to port X) and other ports on the switch to Workstation B (connected to port Y).The queue on port Y starts filling up with data until it reaches a determined threshold. The packet which causes the threshold to be exceeded triggers the Flow Control function on the port from which the packet entered the switch, in this case port X.

Since port X is configured with Flow Control set to Enabled, the switch responds by initiating a pause frame (full duplex applications) or backpressure mechanism (half duplex applications). The pause frame causes

Workstation A to stop sending packets. After a certain amount of time has elapsed, determined by a value in the pause frame, Workstation A will resume sending data. Similarly, the back-pressure mechanism forces

Workstation A to stop sending packets by inducing collisions on port X.

The pause frame flow control mechanism supported by the

ELS100-24TXM switch conforms with the IEEE 802.3x specification for full duplex flow control.

Flow Control 87

The ELS100-24TXM Port Statistics Screen indicates the number of pause frames that have been sent, indicating the number of times full duplex flow control has occurred. For the full duplex pause frame mechanism to work, the device connected to the switch port must also support IEEE 802.3x flow control. Flow Control is configurable per port in the Port Configuration

Menu of the console menu or via SNMP.

88 Flow Control ELS100-24TXM

APPENDIX D. VIRTUAL LANS (VLANS)

VLANs and Frame Tagging

The ELS100-24TXM supports IEEE 802.1Q-compliant virtual LANs

(VLANs). This capability provides a highly efficient architecture for establishing VLANs within a network and for controlling broadcast/ multicast traffic between workgroups. Central to this capability is an explicit frame tagging approach for carrying VLAN information between interconnected network devices.

With frame tagging, a four byte data tag field is appended to frames that cross the network. The tag identifies which VLAN the frame belongs to.

The tag may be added to the frame by the end station itself or by a network device, such as a switch. In addition to VLAN information, the relative priority of the frame in the network can specified by the tag (see

Appendix E, “Class of Service”).

In the example in Figure D-1 below, the workstations attached to the top switch are members of the same two VLANs as the workstations attached to the bottom switch. The 802.1Q tags are used to carry VLAN information in the frames traveling between the two switches.

9032785

Figure D-1. Two Switch VLAN Configuration

Virtual LANs (VLANs) 89

If the ELS100-24TXM is so configured, and, if the frame does not already contain a tag, a VLAN identifier is placed in a tag which is appended to frames as they are received by the switch. Within the switch and between switches compliant with IEEE 802.1Q, these identifiers are used to control the destination of broadcast frames, preventing them from being flooded to all connected stations and interfaces. When frames are forwarded back to destination end stations, the tag may or may not be stripped off, depending on the configuration of the end station and the switch port.

By using 802.1Q tagged VLANs, users from physically dispersed locations can be formed into groups by assigning them to specific VLANs.

Broadcast and multicast traffic for these specific VLANs can be directed across the network without being radiated out to stations that are not members of the same VLANs. Up to 4094 different VLANs can be specified by the 802.1Q tag, thus permitting the configuration of up to

4094 virtual workgroups. This implementation is nonintrusive to endstation applications and the associated clients.

ELS100-24TXM VLAN Configuration

VLAN operation on the ELS100-24TXM is disabled by default. When

VLANs are enabled, all frames are transferred internally through the switch with a VLAN tag. This tag may already be on the frame entering the switch, or added to the frame by the switch. VLAN information already existing on frames entering the switch is automatically handled by the switch. The ELS100-24TXM learns VLAN information from tagged frames and appropriately switches frames out the proper ports based on this information. The configuration of VLANs for frames entering the switch without tags must be made by the user of the switch. This configuration can be made either through the VLAN Menu in the console interface or via SNMP. The parameters used to configure VLANs on the

ELS100-24TXM are explained below.

VLAN ID

The VLAN ID is used to uniquely identify different VLANs on a network.

The VLAN ID information is contained in the 802.1Q tag header on a frame, and so identifies the VLAN to which a frame belongs. The

ELS100-24TXM recognizes VLAN IDs in the tags on frames entering the switch, and can also add tags with an appropriate VLAN ID to untagged frames.

Ports in VLAN

When configuring VLANs on the ELS100-24TXM, individual ports are assigned to specific VLANs by setting the Port VLAN ID (PVID) for each port. Frames entering the switch which are untagged are automatically assigned a VLAN ID by the switch based on the PVID of the incoming port. The Ports in VLAN parameter makes the assignment of ports to

PVIDs. An individual port can only be assigned to a single PVID with this parameter.

90 Virtual LANs (VLANs) ELS100-24TXM

VLAN Egress Ports

The VLAN Egress Ports parameter is used to assign ports to a VLAN for carrying VLAN tagged frames across a network. The assignment of egress ports does not affect the assignment of VLAN IDs to frames entering the switch. However, frames exiting the switch may be sent out the egress ports configured for a specific VLAN ID. Frames exiting the switch via egress ports for a given VLAN are normally tagged.

VLAN Access Ports

Individual ELS100-24TXM ports can be configured as one of two types for the purpose of VLAN configuration: Access or Hybrid. A VLAN Access port is used to connect one or more VLAN-unaware devices to the switch.

VLAN tagged frames are not allowed to enter or exit an Access port. If a tagged frame enters the switch on an Access port, the switch will drop the frame. End-user stations which do not support 802.1Q tags should be attached to ports on the switch configured as Access ports.

In Example 1 in Figure D-2, both ports are designated as Access ports.

The ports are both configured to be on VLAN X. An untagged frame (1) comes in through the left port and gets tagged with a VLAN X tag (2), based on the incoming port PVID. As the frame exits through the right port, the tag is stripped (3) since the outgoing port is an Access port as well and can only transmit untagged frames. The frame can propagate through the switch in this example only because both ports are on the same VLAN.

In Example 2 in Figure D-2, both ports are also Access ports, however the port on the left is on VLAN X while the port on the right on VLAN Y. The untagged frame (1) comes in through the left port and again gets tagged with a VLAN X tag (2). However, because the outgoing port is on a different VLAN (VLAN Y), the frame is dropped. In general, frames cannot propagate between ports unless both ports belong to the same VLAN.

9032785

Figure D-2. VLAN Access Ports

Virtual LANs (VLANs) 91

VLAN Hybrid Ports

A VLAN Hybrid port is used to connect one or more VLAN-aware or

VLAN-unaware devices to the switch. Both tagged and untagged frames can be received and transmitted on Hybrid ports. Egress ports should typically be configured as Hybrid ports.

When a frame with an unlearned source MAC address enters a Hybrid port, the learning of that address and its associated VLAN is dependent on whether the frame is tagged or not. If the frame is untagged, its source

MAC address is learned as a non-tagging station, with a VLAN ID equal to the input port PVID. All frames subsequently sent to that MAC address from this Hybrid port will be untagged. If the frame is tagged, its source

MAC address is learned as a tagging station, with a VLAN ID equal to the value of the VLAN ID in the tag. All frames subsequently sent to that MAC address from this Hybrid port will be tagged with that same VLAN ID.

In Example 1 in Figure D-3A, two ports are configured with two different

PVIDs, X and Y. A frame arrives (1) with a tag for VLAN Z. If the destination MAC address of that frame has already been learned on the destination port as a tagged station with the same VLAN ID of Z, the frame is sent out that port (3) with the VLAN Z tag still appended to it. If the address has not been learned with the VLAN ID of Z on the destination port, the frame is dropped.

In Example 2 in Figure D-3A, a similar scenario to Example 1 occurs, except that the incoming frame (1) is tagged with a VLAN Y tag. The frame is being sent (2) to a port that belongs to VLAN Y. In this case, the decision to append a VLAN Y tag or not to the outgoing frame depends on whether the destination MAC address has been learned as a tagged or as an untagged station. In this example, it was learned as an untagged station, so the frame is sent out without a tag (3).

Z Y

Identifiers

X, Y, Z = VLAN

H = Hybrid

Port

H X H Y H X H Y

Z Y

3 1 3

Example 1 Example 2

Figure D-3. VLAN Hybrid Ports (Examples 1 and 2)

92 Virtual LANs (VLANs) ELS100-24TXM

In Example 3 in Figure D-3B, an untagged frame arrives at the left port

(1). The switch tags the frame with the PVID for VLAN X (2). Since the destination MAC address has already been learned as a tagged station on VLAN X on the outgoing port, the frame is sent out with a VLAN X tag.

Example 4 in Figure D-3B is similar to Example 3 except that both ports

(incoming and outgoing) have a VLAN X PVID. The untagged frame arrives at the incoming port (1) and gets tagged with a VLAN X tag (2).

The tag may or may not be stripped off as the frame exits the switch, depending on how the MAC address of the destination device was learned (3). In this example, the destination was learned as an untagged station so the tag is stripped. This Hybrid port example is thus essentially the same as the Access port case in Figure D-2, Example 1.

When sending broadcast or unknown DA unicast frames out a Hybrid port, the frames are always tagged. The

VLAN ID of the tag is identical to the VLAN ID that was assigned to the frame when it entered the switch on the source port.

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Figure D-3B. VLAN Hybrid Ports (Examples 3 and 4)

Virtual LANs (VLANs) 93

VLAN Application Example

A network administrator can use VLANs to define user groups regardless of the physical LAN segment to which they are connected. The use of

Hybrid and Access links can further refine traffic flow in a multi-switch environment. Figure D-4 shows the combination of both Hybrid and

Access links used in a network with three different VLANs. Workstations are typically connected to the ELS100-24TXM via Access links. On the internal corporate network (backbone), VLAN tags are used to identify the

VLAN association of frames.

It is possible to mix VLAN-aware and VLAN-unaware devices on the same Hybrid switch port. However, this is not recommended design practice.

94 Virtual LANs (VLANs)

Figure D-4. VLAN Application Example

ELS100-24TXM

APPENDIX E. CLASS OF SERVICE

Class of Service support on the ELS100-24TXM allows you to assign mission-critical data a higher priority through the switch by delaying less critical traffic during periods of congestion. Higher priority traffic through the switch is serviced first before lower priority traffic. The Class of

Service capability of the ELS100-24TXM switch is implemented by a priority queuing mechanism. Class of Service is based on the IEEE

802.1p draft standard specification and allows you to define two priorities of traffic on each switch port:

• high

• normal

As traffic enters the switch, it is assigned to one of the two priority levels according to information located in the 802.1Q header tag of the frame

(see Appendix D, “Virtual LANs”) or according to the incoming port number. Frames are then placed into one of two transmit queues on the outbound switch port based on their priority level. Frames on the high priority queue are transmitted first; when that queue empties, traffic on the normal priority queue is transmitted. When priority queuing is being used, each frame that passes through the switch contains a priority level in its header tag. The priority information may already exist in incoming frames, or be assigned by the switch. The determination of individual frame priority is based on the following rules:

Incoming tagged frames contain a priority level (range: 0-7)

Incoming non-tagged frames are assigned a preconfigured default priority level based on their incoming port (range: 0-7). The assignment of priority per port is done via management using the

Port Priority Default parameter.

Priority levels of frames are compared against a reconfigured global priority threshold setting, configured via management using the

Priority Threshold parameter. Those frames with levels equal to or above the threshold are designated high priority traffic; those frames with levels below the threshold are designated normal priority traffic.

The default setting for the threshold parameter is: 4 and above = High

Priority, 3 and below = Normal Priority.

Properly configured, the Class of Service mechanism assures that during congestion, the highest priority data does not get delayed by normal priority traffic. The tagged header in the frame governs individual frame priority.

9032785 Class Of Service 95

Figure E-1 shows priority queuing operating within a switch. Frames entering the switch through ports 1 and 4 are tagged as normal traffic and placed in a normal priority queue on the outbound port. Frames entering through ports 2 and 5 are tagged as high priority traffic and placed in a high priority queue on the outbound port. Priority queuing can be configured using the Class of Service Configuration Menu in the console interface or via SNMP.

Figure E-1. Class of Service Example

96 Class Of Service ELS100-24TXM

APPENDIX F. ACRONYMS & ABBREVIATIONS

9032785

DTR

ICMP

IEEE

LAN

MAC

LED

MDI

MIB

PVID

RFC

RMON

Term

10Base-T

100Base-FX

100Base-TX

ANSI

ASIC

BootP

BPDU

CAT5

CoS

CRC

CSMA/CD

DCE

DHCP

DSR

DTE

Definition

10Mbps twisted-pair Ethernet

100Mbps fiber Fast Ethernet

100Mbps twisted-pair Fast Ethernet

American National Standards Institute

Application Specific Integrated Circuit

Bootstrap Protocol

Bridge Protocol Data Unit

Category 5

Class of Service

Cyclic Redundancy Check

Carrier Sense Multiple Access/Collision Detection

Data Communications Equipment (modem)

Dynamic Host Configuration Protocol

Data Send Ready

Data Terminal Equipment

Data Terminal Ready

Internet Control Message Protocol

Institute of Electrical and Electronics Engineers

Internet Protocol

Local Area Network

Media Access Control

Light Emitting Diode

Media Device Interface

Management Information Base

Port VLAN ID

Request for Comment

Remote Monitoring

Acronyms & Abbreviations 97

Term

RXD

SNMP

STP

TCP/IP

TFTP

TXD

UTP

VLAN

WAN

Definition

Receive Data

Simple Network Management Protocol

Spanning Tree Protocol

Transmission Control Protocol/Internet Protocol

Trivial File Transfer Protocol

Transmit Data

Unshielded Twisted Pair

Virtual Local Area Network

Wide Area Network

98 Acronyms & Abbreviations ELS100-24TXM

INDEX

100Base-FX connectors, 24

10Base-T/100Base-TX connectors, 23

10Base-T/100Base-TX pinouts, 77, 79

802.1D

Spanning Tree Protocol, 61, 81

802.1D Bridge, 6

802.1p, 95

802.1Q, 90

802.3x, 87, 88

A architecture, 2 auto-negotiation, 9, 45, 46 configuring, 63

B base MAC address, 51

BootP/DHCP, 10 configuring, 66 bridge, 83, 84 communicating between bridges,

84 priority, 36

Broadcast Cutoff Rate configuring, 65

C cable

RS-232, 20 certification, 75

Class of Service, 11, 95, 96

802.1p, 95 configuring, 62

Class of Service Configuration Menu, 43 client/server network application, 12 communication settings, 21 community names, 31, 58

Configuring Port Mirroring, 59 configuring the switch common tasks, 55 connecting network cables, 22 console port, 3, 20, 77 connecting to, 20 defined, 3 pin assignments, 77 cost component of each port, 83

9032785 crossover cable, 23 cut-through, 7

Data Rate, 75

Default Gateway setting, 66 designated bridges, 84

Download Software Menu, 29, 52 downloading a software upgrade, 7, 59,

60 downloading via TFTP, 60 downloading via the serial port, 60

DTE connection, 20 dynamic MAC addresses, 64

Electrical Specifications, 76

Environmental Specifications, 75

F factory defaults, 27 fan outlets, 6 fiber uplink modules described

EPIM100-2F2,EPIM100-

2F3,EPIM100-2F4, 24 flow control, 10, 87, 88

802.3x, 87, 88 features, 1 forward delay, 36

Forwarding Table, 6, 33 configuring, 64

Forwarding Table Configuration Menu,

33 frame tagging, 10, 89 front panel, 3 front panel components, 3 full duplex mode, 10

General Information Screen, 29, 51

Hello Time, 36

Index 99

I inspecting your shipment, 15

IP address see assigning, 57

LED mode button, 3, 4, 5 defined, 3

LEDs, 4, 5, 10 local backbone application, 13 login, 26 logout, 29, 53

MAC addresses, 64

Main Menu, 25, 29

Max Age, 36

MDI/MDI-X Crossover Cable Wiring, 78

MDI/MDI-X crossover cable wiring, 78

MDI-X, 23

Memory, 76 menu hierarchy, 28

MIB, 67, 68, 69, 70, 73

MIB-II, 68

Microprocessor, 76 mirrored port, 32 mirroring port, 32 modes of access read-only and read/write, 26 mounting ears, 17, 18

Mounting the Switch, 16, 17 rack, 18 table or shelf, 16 wall, 17

N network configuration status, 57

P password protection, 8, 26, 56 path cost, 37, 38 physical specifications, 76

Port Configuration Menu, 46 port LEDs, 4, 5 defined, 5

Port Menu, 29, 45 port mirroring, 9 configuring, 59

100 Index port operation configuring, 63 port priority, 37

Port Priority Menu, 44 port specifications, 77 port statistics screen, 49

Power Connector, 6 power cord, 21 power cord set requirements, 78 power LED, 3 defined, 3 power source, 15 power switch, 6 powering the switch, 21 power-up count, 51 power-up tests, 21, 22

Priority Default, 44, 62, 95

Priority Threshold, 43, 63, 95

R rear panel, 6 remapping network topology, 84

Reset, 29, 54 resetting the switch, 54

Return to Default Configuration, 29, 53

RJ-45 connectors, 23

RMON, 8, 69

Root Bridge, 84 router, 30, 67

Save Current Configuration, 29, 53

SC fiber connector, 24 screen timeout, 56 serial number, 51 site requirements, 15

SNMP, 8, 31, 58, 67, 68, 73 setting access, 58

SNMP Configuration Menu, 31 software download see downloading a software upgrade,

7 software version, 51

Spanning Tree, 7, 61, 83, 84

Spanning Tree Configuration Menu, 35

Spanning Tree Parameters configuring, 61

Spanning Tree Port #n Configuration

Menu, 38

Spanning Tree Port Configuration Menu,

ELS100-24TXM

Spanning Tree Protocol defaults, 83

Standards Compliance

IEEE, 75 store-and-forward, 7, 83, 98 subnet mask, 57

Switch Configuration Menu, 29, 32 switch statistics, 58

Switch Statistics Screen, 29, 47

Switch Summary Screen, 48

System Configuration Menu, 29, 30

Telnet, 25 connecting, 57 terminal, 8, 20, 97

Test LED, 3, 22 defined, 3

TFTP download, 61

TFTP file name, 52

Unshielded Twisted Pair (UTP), 22

Up Time, 51 user access, 26

Ventilation, 15

VLAN #n Configuration Menu, 41

VLAN Access ports, 42, 90, 91

VLAN application example, 94

VLAN Configuration Menu, 39

VLAN Egress ports, 40, 41, 91

VLAN Hybrid ports, 42, 92, 93

VLAN Menu, 40

VLAN Port Menu, 42

VLANs, 10

802.1Q, 90 configuring, 62

VT100, 8

W workgroup hubs, 13

9032785 Index 101

102 Index ELS100-24TXM

DOCUMENT 591-0046-02A

Key features

24 dual-speed 10Base-T/100Base-TX RJ-45 ports
1 modular slot for 2 100Base-FX fiber ports
4.2 Gbps internal switching fabric with store-and-forward architecture
IEEE 802.1Q tag and port-based Virtual LANs (VLANs)
IEEE 802.1p Class of Service support for traffic prioritization
Flow control (IEEE 802.3x for full duplex, back-pressure for half duplex)
Broadcast throttling for broadcast storm control
SNMP compliant agent with MIB II, Bridge MIB, Ethernet MIB, and RMON groups
Port mirroring for network monitoring and analysis
Multiple management interfaces: serial console, Telnet, and SNMP

Frequently asked questions

The ELS100-24TXM switch supports management via a serial console (out-of-band), Telnet (in-band over Ethernet), and an SNMP-based network manager (in-band).

The ELS100-24TXM switch supports IEEE 802.1D Spanning Tree Protocol, which enables redundant connections for fault tolerance by choosing a single active path and disabling others, preventing network loops.

The ELS100-24TXM switch provides 4 MB of dynamically allocated frame buffering per 8 ports, totaling 12 MB, to queue packets for transmission and prevent frame drops on congested networks.

Yes, the ELS100-24TXM switch supports software upgrades via the industry-standard Trivial File Transfer Protocol (TFTP) or through the serial console port using the XMODEM protocol.

The ELS100-24TXM switch includes 24 dual-speed 10Base-T/100Base-TX RJ-45 ports and a modular slot that can accommodate two 100Base-FX fiber ports.

SmartSTACK 100

ELS100-24TXM

ETHERNET SWITCH

INSTALLATION

AND

USER GUIDE

TABLE OF CONTENTS

PREFACE

Purpose

Audience

Conventions

This section describes the conventions used in this guide.

Organization

1. PRODUCT OVERVIEW

Description

Features

Front Panel

Rear Panel

Feature Summaries

Application Examples

2. INSTALLATION

Inspecting Your Shipment

Site Requirements

Mounting the Switch on a Table or Shelf

Mounting the Switch on a Wall

Mounting the Switch in a Rack

Installing a Fiber Uplink Module into the Switch

Connecting a Terminal to the Console Port

Powering the Switch

Network Cable Requirements

10Base-T/100Base-TX Ports

100Base-FX Fiber Ports

3. ELS100-24TXM USER INTERFACE

Overview

User Access

Factory Defaults

Menu Hierarchy

Main Menu

System Configuration Menu

SNMP Configuration Menu

Switch Configuration Menu

Forwarding Table Configuration Menu

Spanning Tree Configuration Menu

Spanning Tree Port Configuration Menu

Spanning Tree Port #n Configuration Menu

VLAN Configuration Menu

VLAN Menu

VLAN #n Configuration Menu

VLAN Port Menu

Class of Service Configuration Menu

Port Priority Menu

Port Menu

Port Configuration Menu

Switch Statistics Screen

Switch Summary Screen

Port Statistics Screen

General Information Screen

Download Software Menu

Save Current Configuration

Return to Default Configuration

Logout

Reset

4. CONFIGURING & MONITORING THE SWITCH

Common Tasks

Setting Password Protection

Assigning an IP Address

Checking Network Configuration Status

Connecting via Telnet

Setting SNMP Management Access

Viewing Switch Statistics

Configuring Port Mirroring

Downloading a Software Upgrade

Configuring Spanning Tree Parameters

Configuring VLANs

Configuring Class of Service

Configuring Port Operation

Configuring the Forwarding Table

Configuring Broadcast Cutoff Rate

Setting a Default Gateway

Configuring BootP/DHCP