IBM 8239 Token-Ring Stackable Hub Safety guide

8239 Token-Ring Stackable Hub ÉÂÔ
Setup and User’s Guide
GA27-4209-00

8239 Token-Ring Stackable Hub ÉÂÔ
Setup and User’s Guide
GA27-4209-00

Note
Before using this document, read the general information under “Notices” on page ix.
First Edition (June 1998)
This edition applies to the 8239 Token-Ring Stackable Hub and to all subsequent releases and modifications until otherwise indicated
in new editions or technical newsletters.
Order publications through your IBM representative or the IBM branch office serving your locality. Publications are not stocked at the
address below.
IBM welcomes your comments. A form for readers' comments is provided at the back of this publication. If the form has been
removed, you may address your comments to:
International Business Machines Corporation
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Department CGF
P.O. Box 12195
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U.S.A.
When you send information to IBM, you grant IBM a nonexclusive right to use or distribute the information in any way it believes
appropriate without incurring any obligation to you.
 Copyright International Business Machines Corporation 1998. All rights reserved.
Note to U.S. Government Users — Documentation related to restricted rights — Use, duplication or disclosure is subject to
restrictions set forth in GSA ADP Schedule Contract with IBM Corp.

Contents
Notices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ix
Safety Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ix
Safety Information Booklet .............................. ix
Power Disconnection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xiii
Electronic Emission Notices .............................. xiv
Federal Communications Commission (FCC) Statement ........... xiv
Industry Canada Class A Emission Compliance Statement .......... xv
Avis de conformité aux normes d'Industrie Canada .............. xv
European Community (CE) Mark of Conformity Statement .......... xv
Japanese Voluntary Control Council for Interference (VCCI) Statement ... xvi
Taiwanese Class A Warning Statement ..................... xvi
Battery Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xvi
Trademarks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xvi
Preface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xvii
How This Manual Is Organized ............................ xvii
Related Publications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xvii
Visit our Web Site .................................. xviii
Chapter 1. Introduction and Planning ...................... 1-1
Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
Concentrator Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
Device and Network Management .......................... 1-3
Cable Types and Distances .............................. 1-4
Ports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
Stack Unit Cabling ................................. 1-4
RI/RO Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
Physical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
Placement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
Weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
Service Clearances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
Environmental Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
Power Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
Chapter 2. Installing the 8239 Hardware ..................... 2-1
Preparing for Setup .................................. 2-1
Verifying the Shipment ................................. 2-1
Installing Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
Placing the 8239 .................................... 2-2
Surface-Mounting the 8239 ............................ 2-2
Rack-Mounting the 8239 .............................. 2-2
Connecting the Cables ................................. 2-4
Connecting Stations to the 8239 ......................... 2-4
Cabling a Stack ................................... 2-5
Connecting an ASCII Terminal or Modem to the EIA-232 Port ........ 2-5
Powering On the 8239 ................................. 2-6
 Copyright IBM Corp. 1998 iii

Chapter 3. Installing Features . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
16-Port Expansion Feature .............................. 3-1
Removing a 16-Port Expansion Feature ..................... 3-1
Installing a 16-Port Expansion Feature ...................... 3-1
RI/RO Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
Removing a RI/RO Module ............................ 3-2
Installing a RI/RO Module ............................. 3-3
Chapter 4. Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
Using the Command Interface ............................ 4-1
Login Access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
Management Using Emulation Software ..................... 4-1
Management Using Telnet ............................. 4-2
Command Interface Conventions ......................... 4-2
Verifying, Saving, and Restoring Parameters .................. 4-4
Configuring the 8239 .................................. 4-4
Configuring the 8239 for Out-of-Band Connectivity ............... 4-5
Configuring the 8239 for In-Band Connectivity ................. 4-5
Configuring for Network Monitoring ........................ 4-7
Configuration Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-9
Chapter 5. Problem Determination Procedures ................ 5-1
Using the LEDs to Diagnose Problems ....................... 5-1
Power Indicator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2
Box Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2
Ring Speed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3
Port Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3
RI/RO Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-6
Stack In/Stack Out Status ............................. 5-7
LCD and LED Codes ................................ 5-14
POST Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-14
Operational Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-15
Chapter 6. Concentrator Functions . . . . . . . . . . . . . . . . . . . . . . . . 6-1
Port Concepts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
Port Configuration Options ............................. 6-1
Inserting/Deinserting a Station ........................... 6-3
Port Operational Status and Port LEDs ..................... 6-4
Address-to-Port Mapping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-5
Fanout Devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-5
MAC-less Devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-6
Accessing the Address-to-Port Mapping Information .............. 6-6
Port Security . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-7
Identifying which MAC Addresses are Authorized ............... 6-7
Configuring the Action on Intrusion ........................ 6-8
Enabling Port Security ............................... 6-8
Ring In/Ring Out Concepts (8239 Model 1 only) .................. 6-8
RI/RO Configuration Options ........................... 6-9
Unwrapping the RI/RO onto the Stack Data Ring ............... 6-10
RI/RO Operational Status and RI/RO LEDs .................. 6-10
Stack Concepts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-10
SI/SO Configuration Options ........................... 6-11
SI/SO LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-11
Beacon Recovery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-12
iv 8239 Setup and User’s Guide

Data In/Data Out Connection .......................... 6-12
Port Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-13
Management Interface (8239 Model 1 only) .................. 6-13
Ring In/Ring Out Connection (8239 Model 1 only) .............. 6-14
Within the 8239 .................................. 6-14
Chapter 7. 8239 Device Management ...................... 7-1
Connectivity Methods . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1
Out-of-Band Connectivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1
In-Band Connectivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1
Access Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-3
Scripts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-3
Creating Scripts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-4
Editing Scripts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-6
Running Scripts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-7
Trap Processing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-10
Methods of Viewing Traps ............................ 7-11
Configuring for Trap Generation and Accessing Trap Information ..... 7-12
MAC Addresses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-16
Chapter 8. Network Management . . . . . . . . . . . . . . . . . . . . . . . . . 8-1
Accessing Network Management Data ....................... 8-1
IEEE 802.5 Token Ring MIB (RFC 1748) ...................... 8-2
Configuring the 8239 Model 1 to Support the 802.5 MIB ........... 8-2
Accessing 802.5 Information ............................ 8-2
MIB-II (RFC 1213) ................................... 8-4
Configuring the 8239 Model 1 to Support MIB-II ................ 8-4
Accessing MIB II Information ........................... 8-4
Remote Monitoring: RMON, RMON 2, ECAM ................... 8-5
RMON . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-5
RMON 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-8
ECAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-10
IBM Token-Ring Surrogate MIB and Surrogate Trap MIB ............ 8-11
Surrogate Group . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-11
Configuration Report Server (CRS) ....................... 8-13
Ring Error Monitor (REM) ............................ 8-13
Ring Parameter Server (RPS) .......................... 8-16
Chapter 9. Planning Charts . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-1
8239 Cabling Chart ................................... 9-1
Identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-1
Ring Connection for Optional RI/RO Module .................. 9-1
Token-Ring Port Connections ........................... 9-1
Additional Ports with Optional 16-Port Expansion Feature ........... 9-1
8239 SNMP Agent Configuration Parameters Worksheet ............. 9-2
Appendix A. Warranty Information . . . . . . . . . . . . . . . . . . . . . . . A-1
Customer Carry-In Exchange via Mail-In ..................... A-1
Statement of Limited Warranty ........................... A-2
Glossary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . X-1
Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . X-5
Contents v

vi 8239 Setup and User’s Guide

Figures
1-1. 8239 Model 1 ................................. 1-1
1-2. 8239 Model 2 ................................. 1-2
1-3. 8239 Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
2-1. Rotating the Rack-Mounting Brackets ................... 2-3
2-2. Attaching the Cable Management Bracket ................ 2-4
2-3. Connecting Stations to the 8239 ...................... 2-4
2-4. Stack Building . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5
2-5. Power on the 8239 ............................. 2-7
3-1. 16-Port Expansion Feature ......................... 3-1
3-2. RI/RO Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
3-3. Cabling for the Optical Fiber RI/RO Module ............... 3-3
3-4. Cabling for the RJ-45 RI/RO Module ................... 3-4
5-1. 8239 Model 1 LEDs and LCD ....................... 5-1
5-2. 8239 Model 2 LEDs ............................. 5-2
5-3. Port Status LEDs .............................. 5-3
5-4. RI/RO LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-6
5-5. Stack In/Stack Out LEDs .......................... 5-8
 Copyright IBM Corp. 1998 vii

viii 8239 Setup and User’s Guide

Notices
References in this publication to IBM products, programs, or services do not imply
that IBM intends to make these available in all countries in which IBM operates.
Any reference to an IBM product, program, or service is not intended to state or
imply that only IBM’s product, program, or service may be used. Any functionally
equivalent product, program, or service that does not infringe any of IBM’s
intellectual property rights may be used instead of the IBM product, program, or
service. Evaluation and verification of operation in conjunction with other products,
except those expressly designated by IBM, are the user’s responsibility.
IBM may have patents or pending patent applications covering subject matter in
this document. The furnishing of this document does not give you any license to
these patents. You can send license inquiries, in writing, to the IBM Director of
Licensing, IBM Corporation, 500 Columbus Avenue, Thornwood, NY 10594 USA.
Safety Information
Read this important safety information before using the 8239.
Safety Information Booklet
Danger: Before you begin to install this product, read the safety information
in Caution: Safety Information—Read This First , SD21-0030. This booklet describes
safe procedures for cabling and plugging in electrical equipment.
Gevaar: Voordat u begint met de installatie van dit produkt, moet u eerst de
veiligheidsinstructies lezen in de brochure PAS OP! Veiligheidsinstructies—Lees dit
eerst, SD21-0030. Hierin wordt beschreven hoe u electrische apparatuur op een
veilige manier moet bekabelen en aansluiten.
Danger: Avant de procéder à l'installation de ce produit, lisez d'abord les
consignes de sécurité dans la brochure ATTENTION: Consignes de sécurité—A
lire au préalable, SD21-0030. Cette brochure décrit les procédures pour câbler et
connecter les appareils électriques en toute sécurité.
Perigo: Antes de começar a instalar este produto, leia as informações de
segurança contidas em Cuidado: Informações Sobre Segurança—Leia Isto
Primeiro, SD21-0030. Esse folheto descreve procedimentos de segurança para a
instalação de cabos e conexões em equipamentos elétricos.
 Copyright IBM Corp. 1998 ix

Fare! Før du installerer dette produkt, skal du læse sikkerhedsforskrifterne i
NB: Sikkerhedsforskrifter—Læs dette først SD21-0030. Vejledningen beskriver den
fremgangsmåde, du skal bruge ved tilslutning af kabler og udstyr.
Gevaar Voordat u begint met het installeren van dit produkt, dient u eerst de
veiligheidsrichtlijnen te lezen die zijn vermeld in de publikatie Caution: Safety
Information - Read This First , SD21-0030. In dit boekje vindt u veilige procedures
voor het aansluiten van elektrische appratuur.
VAARA: Ennen kuin aloitat tämän tuotteen asennuksen, lue julkaisussa
Varoitus: Turvaohjeet—Lue tämä ensin , SD21-0030, olevat turvaohjeet. Tässä
kirjasessa on ohjeet siitä, miten sähkölaitteet kaapeloidaan ja kytketään turvallisesti.
Danger : Avant d'installer le présent produit, consultez le livret Attention :
Informations pour la sécurité — Lisez-moi d'abord , SD21-0030, qui décrit les
procédures à respecter pour effectuer les opérations de câblage et brancher les
équipements électriques en toute sécurité.
Vorsicht: Bevor mit der Installation des Produktes begonnen wird, die
Sicherheitshinweise in Achtung: Sicherheitsinformationen—Bitte zuerst lesen, IBM
Form SD21-0030. Diese Veröffentlichung beschreibt die Sicherheitsvorkehrungen
für das Verkabeln und Anschließen elektrischer Geräte.
x8239 Setup and User’s Guide

Vigyázat: Mielôtt megkezdi a berendezés üzembe helyezését, olvassa el a
Caution: Safety Information— Read This First, SD21-0030 könyvecskében leírt
biztonsági információkat. Ez a könyv leírja, milyen biztonsági intézkedéseket kell
megtenni az elektromos berendezés huzalozásakor illetve csatlakoztatásakor.
Pericolo: prima di iniziare l'installazione di questo prodotto, leggere le
informazioni relative alla sicurezza riportate nell'opuscolo Attenzione: Informazioni
di sicurezza — Prime informazioni da leggere in cui sono descritte le procedure per
il cablaggio ed il collegamento di apparecchiature elettriche.
Fare: Før du begynner å installere dette produktet, må du lese
sikkerhetsinformasjonen i Advarsel: Sikkerhetsinformasjon — Les dette først ,
SD21-0030 som beskriver sikkerhetsrutinene for kabling og tilkobling av elektrisk
utstyr.
Notices xi

Perigo: Antes de iniciar a instalação deste produto, leia as informações de
segurança Cuidado: Informações de Segurança — Leia Primeiro , SD21-0030. Este
documento descreve como efectuar, de um modo seguro, as ligações eléctricas
dos equipamentos.
Peligro: Antes de empezar a instalar este producto, lea la información de
seguridad en Atención: Información de Seguridad — Lea Esto Primero, SD21-0030.
Este documento describe los procedimientos de seguridad para cablear y enchufar
equipos eléctricos.
Varning — livsfara: Innan du börjar installera den här produkten bör du läsa
säkerhetsinformationen i dokumentet Varning: Säkerhetsföreskrifter— Läs detta
först, SD21-0030. Där beskrivs hur du på ett säkert sätt ansluter elektrisk
utrustning.
xii 8239 Setup and User’s Guide

Power Disconnection
Danger: The main power disconnect for this unit is the appliance inlet
located on the back of the machine. Therefore, the machine should be installed in
such a way that the appliance inlet can be accessed.
DANGER. Le dispositif permettant de couper l'alimentation principale de
cette unité se situe à l'arrière de la machine. Ce dispositif doit donc être accessible.
Vorsicht: Der Hauptschalter zur Unterbrechung der Stromversorgung für
diese Einheit ist der Schalter, der sich auf der Rückseite der Maschine befindet. Die
Maschine sollte daher so aufgestellt werden, daß dieser Schalter jederzeit
zugänglich ist.
Pericolo: Per scollegare questa unità, occorre staccare la spina posta sul
retro della macchina; pertanto la macchina deve essere installata in modo tale che
tale spina sia accessibile.
Fare: Denne enheten frakobles hovednettet via apparatinntaket på baksiden
av maskinen. Derfor må maskinen installeres slik at apparatinntaket er lett
tilgjengelig.
Notices xiii

Perigo: Para desligar a alimentação principal desta unidade é necessário
desconectar o cabo da tomada eléctrica localizada na parte posterior da máquina.
Por consequência, a máquina deve ser instalada de modo a permitir o fácil acesso
a essa tomada.
ОПАСНО: Разъем для отключения питания данного блока
расположен на задней стенке. Поэтому устанавливайте
машину так, чтобы разъем питания был доступен.
Peligro: El interruptor principal de desconexión de esta unidad es la entrada
de conexión del aparato situado en la parte trasera de la máquina. Por lo tanto, la
máquina debe instalarse de modo que la entrada de conexión del aparato sea
accesible.
FARA: Brytning av huvudströmmen till den här enheten görs vid
elanslutningen på baksidan av maskinen. Placera därför maskinen så att
elanslutningen är lättåtkomlig.
Electronic Emission Notices
Federal Communications Commission (FCC) Statement
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 generates,
uses, and can radiate radio frequency energy and, if not installed and used in
accordance with the instruction manual, may cause harmful interference to radio
communications. Operation of this equipment in a residential area is likely to cause
harmful interference, in which case the user will be required to correct the
interference at his own expense.
Properly shielded and grounded cables and connectors must be used in order to
meet FCC emission limits. IBM is not responsible for any radio or television
interference caused by using other than recommended cables and connectors or by
unauthorized changes or modifications to this equipment. Unauthorized changes or
modifications could void the user’s authority to operate the equipment.
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.
xiv 8239 Setup and User’s Guide

Industry Canada Class A Emission Compliance Statement
This Class A digital apparatus complies with Canadian ICES-003.
Avis de conformité aux normes d'Industrie Canada
Cet appareil numérique de la classe A est conform à la norme NBM-003 du
Canada.
European Community (CE) Mark of Conformity Statement
This product is in conformity with the protection requirements of EU Council
Directive 89/336/EEC on the approximation of the laws of the Member States
relating to electromagnetic compatibility. IBM cannot accept responsibility for any
failure to satisfy the protection requirements resulting from a non-recommended
modification of the product, including the fitting of non-IBM option cards. This
product has been tested and found to comply with the limits for Class A Information
Technology Equipment according to CISPR 22/European Standard EN 55022. The
limits for Class A equipment were derived for commercial and industrial
environments to provide reasonable protection against interference with licensed
communication equipment.
Attention: This is a Class A product. In a domestic environment this product may
cause radio interference in which case the user may be required to take adequate
measures.
Zulassungsbescheinigung laut dem Deutschen Gesetz über die
elektromagnetische Verträglichkeit von Geräten (EMVG) vom 30. August 1995
(bzw. der EMC EG Richlinie 89/336).
Dieses Gerät ist berechtigt in Übereinstimmung mit dem Deutschen EMVG das
EG-Konformitätszeichen - CE - zu führen.
Verantwortlich für die Konformitätserklärung nach Paragraph 5 des EMVG ist die
IBM Deutschland Informationssysteme GmbH, 70548 Stuttgart.
Informationen in Hinsicht EMVG Paragraph 3 Abs. (2) 2:
EN 55022 Klasse A Geräte müssen mit folgendem Warnhinweis versehen werden:
“Warnung: dies ist eine Einrichtung der Klasse A. Diese Einrichtung kann im
Wohnbereich Funkstörungen verursachen; in diesem Fall kann vom Betreiber
verlangt werden, angemessene Maßnahmen durchzuführen und dafür
aufzukommen.”
EN 50082-1 Hinweis: “Wird dieses Gerät in einer industriellen Umgebung betrieben
(wie in EN 50082-2 festgelegt), dann kann es dabei eventuell gestört werden. In
solch einem Fall ist der Abstand bzw. die Abschirmung zu der industriellen
Störquelle zu vergrößern.”
Anmerkung: Um die Einhaltung des EMVG sicherzustellen sind die Geräte, wie in
den IBM Handbüchern angegeben, zu installieren und zu betreiben.
Notices xv

Japanese Voluntary Control Council for Interference (VCCI) Statement
This product is a Class A Information Technology Equipment and conforms to the
standards set by the Voluntary Control Council for Interference by Technology
Equipment (VCCI). In a domestic environment this product may cause radio
interference in which case the user may be required to take adequate measures.
Taiwanese Class A Warning Statement
Battery Disposal
The 8239 Model 1 contains a clock module that has an embedded lithium battery.
This battery is not replaceable. Please dispose of this module in accordance with
local ordinances.
Trademarks IBM and Nways are trademarks of the IBM Corporation in the United States or
other countries or both.
UNIX is a registered trademark in the United States and other countries licensed
exclusively through X/Open Company Limited.
Microsoft, Windows, Windows NT, and the Windows 95 logo are trademarks or
registered trademarks of Microsoft Corporation.
Other company, product, and service names may be trademarks or service marks
of others.
xvi 8239 Setup and User’s Guide

Preface
This manual contains information for anyone who is planning to install, configure, or
manage an 8239 Token-Ring Stackable Hub (8239).
How This Manual Is Organized
This manual contains the following sections:
¹Chapter 1, “Introduction and Planning” on page 1-1 introduces the functions,
models, and physical requirements. It also contains configuration and network
planning information.
¹Chapter 2, “Installing the 8239 Hardware” on page 2-1 gives instructions for
setting up the 8239.
¹Chapter 3, “Installing Features” on page 3-1 provides information needed to
install the optional features.
¹Chapter 4, “Configuration” on page 4-1 describes the configuration process.
¹Chapter 5, “Problem Determination Procedures” on page 5-1 provides problem
determination procedures and lists all error codes.
¹Chapter 6, “Concentrator Functions” on page 6-1 describes the concentrator
functions provided by the 8239.
¹Chapter 7, “8239 Device Management” on page 7-1 explains how to
implement management of the device.
¹Chapter 8, “Network Management” on page 8-1 contains information about
accessing network management data.
¹Chapter 9, “Planning Charts” on page 9-1 contains charts to help with planning
for cabling and configuration.
¹Appendix A, “Warranty Information” on page A-1 provides details about your
warranty.
Related Publications
The following publications are shipped with the product in displayable softcopy form
on the 8239 Token-Ring Stackable Hub Softcopy Library CD-ROM (08L3308):
8239 Token-Ring Stackable Hub Setup and User’s Guide, GA27-4209
8239 Token-Ring Stackable Hub Command Reference, GA27-4208
This CD-ROM is shipped with initial orders for the 8239.
These additional publications are shipped in hard copy:
¹ 8239 Token-Ring Stackable Hub Quick Reference, GX27-4047
¹ Caution: Safety Information - Read This First, SD21-0030
¹ License Agreement for Machine Code , Z125-5468
For general information about token-ring architecture, see Token-Ring Network
Architecture , SC30–3374.
 Copyright IBM Corp. 1998 xvii

Visit our Web Site
This IBM web page provides product information:
http://www.networking.ibm.com/support
xviii 8239 Setup and User’s Guide