Cabletron Systems SEH-22 User manual

SEH-22 AND SEH-24 10BASE-T

STACKABLE HUB

USER’S GUIDE

CABLETRON SYSTEMS, P. O. Box 5005, Rochester, NH 03866-5005

SEH Book Page 1 Tuesday, March 19, 1996 4:12 PM

SEH USER’S GUIDE

NOTICE

Cabletron Systems reserves the right to make changes in specifications and other information

contained in this document without prior notice. The reader should in all cases consult Cabletron

Systems to determine whether any such changes have been made.

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

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

INDIRECT, SPECIAL, OR CONSEQUENTIAL DAMAGES WHATSOEVER (INCLUDING BUT

NOT LIMITED TO LOST PROFITS) ARISING OUT OF OR RELATED TO THIS MANUAL OR

THE INFORMATION CONTAINED IN IT, EVEN IF CABLETRON SYSTEMS HAS BEEN

ADVISED OF, KNOWN, OR SHOULD HAVE KNOWN, THE POSSIBILITY OF SUCH

DAMAGES.

Printed in the United States of America

Order Number: 9031491 August 1995

SPECTRUM

LANVIEW

and

Remote LANVIEW

are registered trademarks and

EPIM-A

EPIM-C

EPIM-F1/F2/F3

EPIM-T

EPIM-X

HubSTACK

MicroMMAC

SEHI

and

SEH

are

trademarks of Cabletron Systems, Inc.

CHAMP

is a trademark of AMP, Inc.

CompuServe

is a registered trademark of CompuServe, Inc.

DEC

VT200

VT300

and

VT320

are trademarks of Digital Equipment Corporation.

Ethernet

is a trademark of Xerox Corporation.

IBM

is a registered trademark of International Business Machines Corporation.

is a registered trademark of American Telephone and Telegraph Company

UNIX

is a trademark of Unix Systems Laboratories, Inc.

Windows

is a registered trademark of Microsoft Corporation.

This electric hazard symbol appears in the SEH User’s Guide. Read all

instructions following this symbol. Failure to follow the instructions

appearing with this symbol could result in the presence of an electric

hazard which has the potential to cause injury.

Printed On Recycled Paper

SEH Book Page i Tuesday, March 19, 1996 4:12 PM

NOTICE

SEH USER’S GUIDE

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,pursuanttoPart15oftheFCCrules.Theselimitsaredesignedtoprovidereasonableprotection

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

thisequipmentinaresidentialareaislikelytocauseinterferenceinwhichcasetheuserwillberequired

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.

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 equipment is in the 1st Class Category (information equipment to be used in commercial and/or

industrial areas) and conforms to the standards set by the Voluntary Control Council for Interference

by Information Technology Equipment (VCCI) aimed at preventing radio interference in commercial

and/or industrial areas.

Consequently, when used in a residential area or in an adjacent area thereto, radio interference may be

caused to radios and TV receivers, etc.

Read the instructions for correct handling.

SEH Book Page ii Tuesday, March 19, 1996 4:12 PM

NOTICE

SEH USER’S GUIDE

iii

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 AGREEING TO BECOME

BOUND BY THE TERMS OF THIS AGREEMENT, WHICH INCLUDES THE LICENSE AND

THE LIMITATION OF WARRANTY AND DISCLAIMER OF LIABILITY. IF YOU DO NOT

AGREE TO THE TERMS OF THIS AGREEMENT, 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

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

Program.

3. APPLICABLE LAW. This License Agreement shall be interpreted and governed under the

laws and in the state and federal courts of New Hampshire. You accept the personal jurisdiction

and venue of the New Hampshire courts.

SEH Book Page iii Tuesday, March 19, 1996 4:12 PM

NOTICE

SEH USER’S GUIDE

EXCLUSION OF WARRANTY

AND DISCLAIMER OF LIABILITY

1. EXCLUSION OF WARRANTY. Except as may be specifically provided by Cabletron in

writing, Cabletron makes no warranty, expressed or implied, concerning the Program (including

Its documentation and media).

CABLETRON DISCLAIMS ALL WARRANTIES, OTHER THAN THOSE SUPPLIED TO

YOUBYCABLETRONINWRITING,EITHEREXPRESSORIMPLIED,INCLUDINGBUT

NOT LIMITED TO IMPLIED WARRANTIES OF MERCHANTABLITY AND FITNESS

FOR A PARTICULAR PURPOSE, WITH RESPECT 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 WHATSOEVER

(INCLUDING, WITHOUT LIMITATION, DAMAGES FOR LOSS OF BUSINESS,

PROFITS, BUSINESS INTERRUPTION, LOSS OF BUSINESS INFORMATION, SPECIAL,

INCIDENTAL, CONSEQUENTIAL, OR RELIANCE DAMAGES, OR OTHER LOSS)

ARISING OUT OF THE USE OR INABILITY TO USE THIS CABLETRON PRODUCT,

EVEN IF CABLETRON HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH

DAMAGES. BECAUSE SOME STATES DO NOT ALLOW THE EXCLUSION OR

LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES, OR

ON THE DURATION OR LIMITATION OF IMPLIED WARRANTEES 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., P.O. Box 5005, Rochester, New Hampshire 03866-5005.

SEH Book Page iv Tuesday, March 19, 1996 4:12 PM

SEH USER’S GUIDE

TABLE OF CONTENTS

CHAPTER 1 INTRODUCTION

1.1 USING THIS MANUAL............................................................................1-1

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

1.3 SEH OVERVIEW.....................................................................................1-2

1.4 SEH FEATURES.....................................................................................1-3

1.5 STACKABLE CAPABILITIES ..................................................................1-4

1.6 OPTIONAL FEATURES ..........................................................................1-4

1.7 RELATED MANUALS..............................................................................1-6

CHAPTER 2 INSTALLATION

REQUIREMENTS/SPECIFICATIONS

2.1 CABLE SPECIFICATIONS......................................................................2-1

2.1.1 HubSTACK Interconnect Cable Requirements.........................2-1

2.1.2 10BASE-T UTP and STP Cable Specifications.........................2-2

2.2 NETWORK PORT SPECIFICATIONS ....................................................2-4

2.3 TRANSCEIVER REQUIREMENTS.........................................................2-4

2.4 OPERATING SPECIFICATIONS.............................................................2-5

CHAPTER 3 INSTALLATION

3.1 UNPACKING THE SEH...........................................................................3-1

3.2 INSTALLING THE SEH...........................................................................3-1

3.2.1 Tabletop or Shelf Installation.....................................................3-2

3.2.2 Rackmount Installation Requirements.......................................3-3

3.2.3 Attaching the Strain Relief Bracket............................................3-4

3.2.4 Rack Mounting the SEH............................................................3-5

3.2.5 Stacking the SEH......................................................................3-6

3.3 CONNECTING THE SEH TO THE POWER SOURCE...........................3-9

3.4 ADDING/REPLACING EPIMs .................................................................3-9

CHAPTER 4 CONNECTING TO THE NETWORK

4.1 CONNECTING THE SEH TO THE NETWORK ......................................4-1

4.1.1 Connecting Network Ports, SEH-22 and SEH-24 .....................4-1

4.1.2 Connecting a UTP Segment to an EPIM-T ...............................4-3

4.1.3 Connecting a Fiber Segment to an EPIM-F1/F2/F3..................4-4

4.1.4 Connecting a Thin-Net Segment to an EPIM-C ........................4-6

4.1.5 Connecting an AUI Cable to an EPIM-A ...................................4-8

4.1.6 Connecting an AUI Cable to an EPIM-X ...................................4-9

4.2 FINISHING THE INSTALLATION..........................................................4-10

SEH Book Page v Tuesday, March 19, 1996 4:12 PM

CONTENTS

SEH USER’S GUIDE

CHAPTER 5 TROUBLESHOOTING

5.1 INSTALLATION CHECK-OUT.................................................................5-1

5.2 USING LANVIEW ....................................................................................5-2

APPENDIX A EPIM INFORMATION

A.1 EPIM SPECIFICATIONS........................................................................ A-1

A.1.1 EPIM-T ..................................................................................... A-1

A.1.2 EPIM-F1 and EPIM-F2............................................................. A-2

A.1.3 EPIM-F3 ................................................................................... A-3

A.1.4 EPIM-C..................................................................................... A-5

A.1.5 EPIM-A and EPIM-X (AUI Port)................................................ A-6

A.2 EPIM CABLE SPECIFICATIONS ........................................................... A-7

A.2.1 Multimode Fiber Optic Cable Specifications............................. A-7

A.2.2 Single Mode Fiber Optic Cable Specifications ......................... A-8

A.2.3 Thin-Net Network Requirements for the EPIM-C ..................... A-9

A.2.4 AUI Cable Requirements for the EPIM-A and EPIM-X........... A-10

INDEX

SEH Book Page vi Tuesday, March 19, 1996 4:12 PM

SEH USER’S GUIDE

1-1

CHAPTER 1

INTRODUCTION

Welcome to the Cabletron Systems

SEH-22 and

SEH-24 10BASE-T

Stackable Hubs User’s Guide

. This manual provides installation

instructions and reference information for the SEH-22 and SEH-24.

1.1 USING THIS MANUAL

Read through this manual completely to familiarize yourself with its

content and to gain an understanding of the features and capabilities of

the SEH. A general working knowledge of Ethernet and IEEE 802.3 type

data communications networks and their physical layer components is

helpful when installing the SEH.

Chapter 1,

Introduction

, outlines the contents of this manual, brieﬂy

describes SEH features, and concludes with a list of related manuals.

Chapter 2,

Installation Requirements/Speciﬁcations

, describes

installation requirements, network guidelines, and speciﬁcations.

Chapter 3,

Installation

, contains instructions for installing the SEH as a

stackable or stand-alone hub.

Chapter 4,

Connecting to the Network

, explains how to connect the SEH

to the network using the various media types.

Chapter 5,

Troubleshooting

, describes how to use the LANVIEW LEDs

to troubleshoot network problems.

Appendix A,

EPIM Information

, provides speciﬁcations, cabling

information, and switch settings for the Ethernet Port Interface Modules.

SEH Book Page 1 Tuesday, March 19, 1996 4:12 PM

CHAPTER 1:

INTRODUCTION

1-2

SEH USER’S GUIDE

1.2 GETTING HELP

If you need additional support related to the Cabletron Systems SEH, or if

you have any questions, comments, or suggestions concerning this

manual, contact Cabletron Systems Technical Support:

By phone ..........................(603) 332-9400

Monday-Friday; 8am - 8pm Eastern Time

By CompuServe...............GO CTRON from any ! prompt

By Internet mail ...............[email protected]

By FTP.............................134.141.197.25

anonymous

, Password:

your email address

1.3 SEH OVERVIEW

The SEH-22 is a non-intelligent repeating hub that has 12 RJ45 ports and

one Ethernet Port Interface Module (EPIM) port on the front panel for

network connections while the SEH-24 has 24 RJ45 ports and two EPIM

ports on the front panel for network connections. Both models have two

rear panel HubSTACK Interconnect Bus ports for stackable connections.

Figure 1-1. Front and Rear Views of the SEH-22 and SEH-24

HubSTACK10BASE-T HUB WITH LANVIEW®

SEH-22

1491_1

SEH INTERCONNECT

OUT IN

EPIM-1

EPIM-2

PWR

MGMT

CLN E1

RCV

LNK

RCV

LNK

24 22 20 18 16 14 12 246810

23 21 19 17 15 13 11 13579

2X4X6X8X10X12X

14X16X18X20X22X24X

1X3X5X7X9X11X13X15X17X19X21X23X

HubSTACK10BASE-T HUB WITH LANVIEW®

SEH-24

HubSTACK10BASE-T HUB WITH LANVIEW®

SEH-24

SEH INTERCONNECT

OUT IN

EPIM-1

PWR

MGMT

CLN E1

RCV

LNK

RCV

LNK

12 246810

11 13579

2X4X6X8X10X12X

1X3X5X7X9X11X

HubSTACK10BASE-T HUB WITH LANVIEW®

SEH-22

SEH Book Page 2 Tuesday, March 19, 1996 4:12 PM

SEH FEATURES

SEH USER’S GUIDE

1-3

Stack up to ﬁve SEH hubs using Cabletron Systems external HubSTACK

Interconnect cables. Manage the stack by using the Cabletron Systems

MicroMMAC or SEHI (Stackable Ethernet Hub with Intelligence). Up to

four SEH hubs can be stacked with one intelligent hub. Stackable

conﬁgurations make it possible to maintain only one IEEE repeater hop

while providing up to 130 Ethernet ports.

1.4 SEH FEATURES

Repeater Functionality

The SEH fully conforms to the IEEE 802.3 Repeater, AUI, and

10BASE-T speciﬁcations, and provides the ﬂexibility to connect

networks using IEEE 802.3, Ethernet Version 1 or Version 2 equipment.

The SEH transmits re-timed data packets, regenerates the preamble,

extends fragments, and arbitrates collisions.

The SEH automatically partitions problem segments, and reconnects

repaired segments to the network. This feature minimizes the impact on

network operation by isolating the problem segment. Only devices on the

problem segment are affected. When the problem is solved, the SEH

automatically reconnects the isolated segment to the network.

Polarity Detection and Correction

Each twisted pair port on the SEH incorporates a Polarity Detection and

Correction feature that allows the SEH to pass data regardless of the

polarity of the twisted pair segment’s receive link. Cabletron does not

recommend operating in this condition. When this condition is

discovered, remove the segment from the network and wire it correctly to

reduce the potential for problems if equipment changes are made.

LANVIEW LEDs

Cabletron Systems LANVIEW Status Monitoring and Diagnostics

System is a troubleshooting tool that helps in diagnosing power failures,

collisions, cable faults, and link problems. The LANVIEW LEDs are

located on the front panel.

SEH Book Page 3 Tuesday, March 19, 1996 4:12 PM

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