Digital Equipment DECrepeater 900TM Operating and maintenance instructions

DECrepeater 900TM
Installation and Configuration
Part Number: EK–DETMM–IN. B01
August 1994
This manual describes how to install and configure
the DECrepeater 900TM module.
Revision/Update Information: This is a revised manual.

Copyright
August 1994
The information in this document is subject to change without notice and should not be construed as a
commitmentbyDigital EquipmentCorporation. DigitalEquipment Corporationassumes noresponsibility
for any errors that may appear in this document.
Copyright 1994 by Digital Equipment Corporation.
All rights reserved. Printed in U.S.A.
Thepostage-paidReader’sComments format thebackof thisdocument requestsyour evaluationof this
document to assist us in preparing future documentation.
The following are trademarks of Digital Equipment Corporation: DEC, DEChub, DEChub ONE,
DECndu, DECndu Plus, DECrepeater, Digital, HUBwatch, MultiSwitch, OpenVMS, ThinWire, ULTRIX,
VAX, VMS, and the DIGITAL logo.
MS-DOS is a registered trademark of Microsoft Corporation.
FCC NOTICE —Class A Computing Device:
This equipment generates, uses, and may emit radio frequency energy. The equipment has been type
testedand foundtocomplywiththelimitsforaClass Acomputing devicepursuant toSubpart Jof Part15
of FCC Rules, which are designed to provide reasonable protection against such radio frequency
interferencewhenoperatedinacommercialenvironment.Operationofthisequipmentinaresidentialarea
may cause interference; in which case, measures taken to correct the interference are at the user’s
expense.
VCCI NOTICE —Class 1 Computing Device:
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
Data Processing Equipment and Electronic Office Machines aimed at preventing radio interference in
commercialand/or industrialareas. Consequently, when used in a residential area or in an adjacent area
thereto, radio interference may be caused to radios and TV receivers.
Read the instructions for correct handling.
CE NOTICE – Class A Computing Device:
Warning!
Thisis a Class A product. In a domestic environment this product may causeradio interference,inwhich
case the user may be required to take adequate measures.
Achtung!
Dieses ist ein Gerät der Funkstörgrenzwertklasse A. In Wohnbereichen können bei Betrieb dieses
Gerätes Rundfunkstörungen auftreten, in welchen Fällen der Benutzer für entsprechende
Gegenmaßnahmen verantwortlich ist.
Attention!
Ceci est un produit de Classe A. Dans un environment domestique, ce produit risque de créer des
interférences radioélectriques, il appartiendra alors à l’utilisateur de prendre les mesures spécifiques
appropriées.

iii
Contents
Safety
Introduction 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Features 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Front Panel 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Back Panel 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installing the Module 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removing the Module 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Configuring the Module 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Setup Port Description 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Setup Port Device Cabling 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Accessing the Setup Port 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Start Redirect Mode 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DECrepeater 900TM Installation Menu (DEChub ONE Options) 13. . . . . .
DECrepeater 900TM Installation Menu (DEChub 900 Options) 14. . . . . . .
Description of Menu Options 15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
LED Descriptions 35. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Problem Solving Using the LEDs 36. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Normal Powerup 36. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Problem Solving 36. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

iv
Contents (Cont.)
Connector Pin Assignments 39. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Internal Crossover Configuration 39. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
External Crossover Configuration 39. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
H8571-J Adapter 40. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
H8575-A Adapter 40. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
10BaseT Port (8-pin MJ) Connector 41. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Product Specifications 42. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Associated Documents 44. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tables
1 The Downline Upgrade (DLU) Process 26. . . . . . . . . . . . . . . . . . . . . . . . .
2 Module LED States 35. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3 Problem Solving Using the LEDs 36. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4 DECrepeater 900TM Operating Specifications 42. . . . . . . . . . . . . . . . . .
5 Acoustical Specifications 43. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

v
Safety !
Any warning or caution that appears in this manual is defined as follows:
WARNING Contains information to prevent personal injury.
CAUTION Contains information to prevent damage to equipment.
VORSICHT Enthält Informationen, die beachtet werden müssen,
um den Benutzer vor Schaden zu bewahren.
ACHTUNG Enthält Informationen, die beachtet werden müssen,
um die Geräte vor Schaden zu bewahren.
DANGER Signale les informations destinées à prévenir les acci-
dents corporels.
ATTENTION Signale les informations destinées à prévenir la détéri-
oration du matériel.
AVISO Contiene información para evitar daños personales.
PRECAUCION Contiene información para evitar daños al equipo.

vi
Safety !(Cont.)
CAUTION !This action deletes all configured settings and replaces
them with factory default values. All configuration settings
will be lost. [Page 16.]
ACHTUNG Bei diesem Vorgang werden alle Konfigurationseinstel-
lungen gelöscht und die Werkseinstellungen wieder ein-
gesetzt. Alle Konfigurationsdaten gehen verloren.
ATTENTION Cette action supprime tous les paramètres de configura-
tion et les remplace par des valeurs prédéfinies. Tous
les paramètres de configuration seront perdus.
PRECAUCION Esta intervención borrará todos los parámetros de confi-
guración y los sustituirá por valores por defecto definidos
de fábrica. Se perderán todos los parámetros de configu-
ración.

vii
Safety !(Cont.)
CAUTION !If power is interrupted during Stage 3 of the DLU process,
the firmware image can become corrupted. Do not turn off
power to the unit or perform any action that can cause the
unit to lose power during Stage 3 of the DLU process.
[Pages 25, 27, and 30.]
ACHTUNG Sollte während der Phase 3 des DLU–Prozesses eine
Unterbrechung der Stromversorgung eintreten, kann das
Firmwareprogramm zerstört werden. Aus diesem Grunde
wird dringend empfohlen, Vorkehrungen zu treffen, daß
während der Durchführung dieser Phase 3 die System-
einheit weder ausgeschaltet noch die Stromversorgung
unterbrochen werden kann.
ATTENTION L’image du microprogramme risque d’être corrompue, en
cas de coupure de courant au cours de l’étape 3 du pro-
cessus DLU. Ne mettez pas l’unité hors tension et n’exé-
cutez aucune action risquant d’entraîner une coupure
d’alimentation au cours de cette étape.
PRECAUCION Si se interrumpe el suministro eléctrico durante la Etapa
3del proceso DLU, puede dañarse la imagen del firm-
ware. No se debe apagar la unidad ni realizar ninguna
operación que pueda causar una interrupción del sumi-
nistro de la unidad durante la Etapa 3 del mencionado
proceso.

DECrepeater 900TM Installation and Configuration 1
Introduction
The DECrepeater 900TM (also referred to in this manual as the module) is a
full-height, 32-port, 10BaseT, Ethernet repeater.
Inthismanual, thetermEthernetisDigital’stermforitsproductcompatibilitywiththe
ISO 8802-3/ANSI/IEEE 802.3 standards and the Ethernet standards for Carrier
Sense Multiple Access with Collision Detection (CSMA/CD) local area networks
(LANs).
To give your workgroup LAN media flexibility and connectivity, the module can be
configured into a DEChub 900 MultiSwitch (also referred to in this manual as the
DEChub900). One or more DECrepeater 900TM modules (up to 8) can be installed
into the DEChub 900. The module can also serve as a standalone unit when
configured with a DEChub ONE docking station (see the DEChub ONE Installation
manual).
When the module is installed into a DEChub 900 or into a DEChub ONE, the
module’s hot-swap capability allows you to install or remove the module without
turning off power.
Thefrontpanelprovides3210BaseTportsusing8-pinmodularjack(MJ)connectors
that support 100-ohm unshielded twisted pair (UTP) and 100-ohm shielded
twisted-pair (STP) cables. The module’s front panel light-emitting diodes (LEDs)
indicate the operating status of the module, the ports, and the network.
Features
Your DECrepeater 900TM module includes the following features:
•Accessto ThinWire 10Base2 segment in the DEChub 900 MultiSwitch or to the
AUI port in the DEChub ONE docking station.
•Backplane access to multiple LANs through one of six flexible channels in the
DEChub 900.
•Automatic module self-test at powerup.
•Port-level packet address security.

2DECrepeater 900TM Installation and Configuration
Introduction (Cont.)
•Momentary LED cycle switch on the front panel enables you to observe one
bank of Port State LEDs at a time.
•In-band Simple Network Management Protocol (SNMP) management.
•Out-of-Band Management (OBM) using SNMP over Serial Line Internet Proto-
col(SLIP)throughtheOBMconnectorontheDEChub900ortheDEChubONE
docking station in addition to the normal in-band management.
•Built-in SNMP agent supports the following management information bases
(MIBs):
–Internet Engineering Task Force (IETF) Repeater MIB (RFC 1516)
–Ethernet-like Interface Type MIB (RFC 1398)
–Digital Extended Repeater MIB
–DEChub 900 Public Common MIB
–MIB II (RFC 1213)
•Manageabilityusingany generic SNMP management application that supports
the MIBs listed above.
•Upgradeable device firmware (in nonvolatile Flash memory) using Trivial File
TransferProtocol(TFTP)withDigital’sNetworkDeviceUpgrade(DECndu)Plus
utility or through the setup port with any TFTP server.
•User-friendly advanced Graphical User Interface (GUI) manageability with
Digital’s HUBwatch Network Management Station (NMS) application.

3
DECrepeater 900TM Installation and Configuration
Front Panel
1) Power LED — Lights when the module has
power.
2) Module OK LED — Lights when the module
passesself-test.Ifthemodulefailsself-test,theMod-
ule OK LED remains off.
3) Network OK LED —Indicatesthestatus of the
backplane ThinWire port on the DEChub 900 or of
the AUI port on the DEChub ONE docking station.
4) Network Activity LED — Indicates network
traffic level.
5) Port State LEDs — The LEDs (labeled 1through 8)
show the status of one of the four banks of ports, de-
pending on the state of the Bank Indicator LEDs.
6) Bank Indicator LEDs — The LEDs (labeled A
throughD)light one at atimefor a few seconds,indi-
catingwhichbankofconnectors,iscurrentlydisplay-
ing its port connection status on the eight Port State
LEDs.
NOTE: For more information about the
module’s LEDs, refer to the section
titled LED Descriptions.
7) Momentary LED cycle switch — Stops and starts
the LED status scanning of the Bank Indicator LEDs
during operation.
8) 10BaseT (8-pin MJ) port connectors — Connec-
tors for ports 1 to 32. Support both UTP and STP
cabling.
LKG-7455-93I
2
3
8
6
7
5
1
4

LKG-8709-93I
7
1
2
3
8
4
5
6
4DECrepeater 900TM Installation and Configuration
Back Panel
1) Lockingtab—LocksthemoduleintoaDEChub900
backplane or into the DEChub ONE docking station.
It also contains the hot-swap switch lever.
2) 48-pin connector — Provides network and power
connections to the module when the module is
installedintoaDEChub900oraDEChubONEdock-
ing station.
3) Grounding bolt — Provides a chassis grounding
connection between the module and a DEChub 900
or DEChub ONE docking station.
4) Manufacturing label — Lists the module part num-
ber,serial number,revision level,and powerrequire-
ments.
5) 160-pin connector — Provides network and power
connections to the module when the module is
installed into a DEChub 900 or DEChub ONE dock-
ing station.
6) Mounting tab — Secures the module to the back-
plane when the module is installed into a DEChub
900 or DEChub ONE docking station.
7) Grounding fingers — Provides additional chassis
grounding between the module and a DEChub 900
or DEChub ONE docking station.
8) Address label — Contains the module’s 48-bit
Ethernet hardware address.

Module’s Manufacturing
Label (Example)
If any of the module’s power requirements
exceed the values shown in the status dis-
play, add another power supply (see the
DEChub 900 MultiSwitch Owner’s Manual).
Hub Manager Status
Display (Example)
LKG–9346–94I
Available: 90.5 W
5V: 13.0 A, 15V: 3.5 A
27.5 W
5 V
12 V
15 V
4.0 A
0.1 A
0.5 A
5
DECrepeater 900TM Installation and Configuration
Installing the Module
Themodulehot-swapfeatureallowsyoutoinstallthemoduleintotheDEChub900or
DEChubONEdocking stationwithout turningoffpower.Seating themoduleinitiates
the powerup sequence if enough power is available.
1Compare your module’s power
requirements with the values
shownin the HubManagerstatus
display (see examples).
NOTE: The 12V power in the DEChub 900 is derived from the
15V power source. Although it is listed separately in the
product specifications, the 12V requirements are
included in the 15V power total.
2Seat the module into the
DEChub 900.
a. Place the module’s mounting
tab into a mounting slot on the
DEChub 900.
b. Pivot the module on the mount-
ing tab and align the connec-
tors.
c. Firmlypushthemoduleontothe
backplane connectors until the
release lever clicks.
d. Pressdownonthereleaselever
to ensure that it is locked. Mounting tab
LKG–8711–93I
Release lever clicks
when module is
seated. Hub Manager
status display

6DECrepeater 900TM Installation and Configuration
Installing the Module (Cont.)
3Verify that the module’s Power
LED lights immediately, and that
the Module OK LED lights
within 1 minute.
a. The Power LED lights when
the power is applied, then the
module performs a self-test.
b. After the module completes
self-test, the Module OK
LED lights and remains lit, then
the Hub Manager status
display shows:
DECrepeater 900TM
up
NOTE: If the LEDs do not operate as described, refer to the
section entitled Problem Solving Using the LEDs.
4Connect the 10BaseT Port cable.
TheDECrepeater900TMmoduleusescrossover10BaseT(8-pinMJ)portconnectors.
The appropriate UTP/STP cable type, crossover or straight-through, is required to
ensure that the module’s transmit/receive signals connect correctly to the
transmitter/receiver of the connected device.
Before connecting the cables to the module, note the following:
•If the device you are connecting to the module uses straight-through connectors,
use straight-through cables.
•If the device you are connecting to the module uses crossover connectors, use
crossover cables.
•The sum of crossovers must always equal an odd number.
NOTE: Digital’s straight-through cables are marked (=);
crossover connectors (and cables) are marked (X).
LKG-9345-93I

7
DECrepeater 900TM Installation and Configuration
Installing the Module (Cont.)
Ifyouneedhelpdeterminingtheappropriatecabletypetouse,refertothesectiontitled
Connector Pin Assignments.
To connect the UTP/STP cables, complete the following steps:
a. Align the release tab on the
cable plug with the keyway on
the module’s 8-pin MJ connec-
tor.
b. Insert the plug into the connec-
tor,ensuringthatthereleasetab
snaps into the locked position.
NOTE: To disconnect the UTP/STP cables, press the release
tab on the 8-pin MJ connector, then disconnect the
cable.
After all cables are installed, go to the section titled Configuring the Module.
LKG–9347-93I
Keyway
Release
tab

LKG–9348-93I
Keyway
Release
tab
8DECrepeater 900TM Installation and Configuration
Removing the Module
1Disconnect all the UTP/STP
cables from the module.
a. To remove the UTP/STP
cables, press the release tab
on the 8-pin MJ connector.
b. Disconnect the cable.
2Unseat the module from the
DEChub 900.
a. Lift the release lever located on
the top of the DEChub 900 slot.
b. Pivot the module back on its
bottom mounting tab, and dis-
engage the module from the
backplane.
Mounting tab
LKG–8717-93I
Lift release lever

9
DECrepeater 900TM Installation and Configuration
Configuring the Module
Setup Port Description
The setup port (on the DEChub 900 MultiSwitch or the DEChub ONE docking
station)allows youtoaccess andsetDECrepeater 900TMparameters.This section
describes how to access the module from either port and how to set those
parameters.
NOTE: Thesetupport screen displays illustratedinthis manual
mayvaryslightlyfromtheactualscreendisplaysonyour
setup port device.
The signals from the DEChub 900 Hub Manager setup port and from the DEChub
ONEdocking stationsetupport conformto theEIA-232D signalingstandard at9600
baud. To the user, the port appears as a data terminal equipment (DTE) device.
NOTE: Devices that use the EIA-423 signaling standard are
compatible with the DEChub 900 Hub Manager setup
port.
Setup Port Device Cabling
Thesetupport on theDEChub900 MultiSwitch ortheDEChub ONEdockingstation
canbeconnected toasetupportdevice(aterminalorpersonalcomputer),usingthe
following cables and adapters.
Cable/Adapter Type Connecting Device
BN24H-xx1A terminal with a 6-pin MMJ connector
BN24H-xx1/H8575-A A terminal with a 25-pin D-Sub connector
BN24H-xx1/H8571-J A PC with a 9-pin D-Sub communications port
1xx indicates cable length in meters.
Accessing the Setup Port
To access the setup port on the DECrepeater 900TM module, do the following:
1. Ensure that the transmit and receive baud rates on the setup port device are
set to 9600 baud.
2. Connect the setup port device to the setup port connector on either the
DEChub 900 or the DEChub ONE docking station (see illustration).

10 DECrepeater 900TM Installation and Configuration
Configuring the Module (Cont.)
Setup port
LKG–8718-93I
DEChub ONE
Setup port
DEChub 900 MultiSwitch
OBM port
OBM port
BN24H cable
H8571-J
H8575-A
To setup port device
BN24H
cable
H8571-J
H8575-A
To setup port device

Choose option 13, then
go to the section titled
Start Redirect Mode.
The DECrepeater 900TM does not
support Option [9] Downline
Upgrade from this menu.
You must choose Option [13]
Start Redirect Mode to perform
a downline upgrade to this module.
11
DECrepeater 900TM Installation and Configuration
Configuring the Module (Cont.)
3. Press Return on the setup port device a few times until a menu appears.
a. If the module is connected to the setup port on the DEChub ONE dock-
ing station, the DECrepeater 900TM INSTALLATION MENU ap-
pears. Go to the section titled DECrepeater 900TM Installation Menu
(DEChub ONE Options).
b. If the module is connected to the Hub Manager setup port on the
DEChub 900, the DEChub 900 MultiSwitch INSTALLATION
MENU appears (see following example).
The following is an example of the DEChub 900 MultiSwitch INSTALLATION
MENU:
DEChub 900 MultiSwitch
DEChub 900 MultiSwitch INSTALLATION MENU
[1] Reset with Factory Defaults
[2] Reset with Current Settings
[3] Show Current Settings
[4] Set SNMP Read/Write Community
[5] Add SNMP Trap Addresses
[6] Delete SNMP Trap Addresses
[7] Dump Error Log
[8] Set In-Band Interface IP Address
[9] Downline Upgrade
[10] Set Out-of-Band Interface IP Address
[11] Set Out-of-Band Interface Port Speed
[12] Start Event Display Mode
[13] Start Redirect Mode
Enter selection : 13 Return
c. Choose option 13, then go to the section titled Start Redirect Mode.

Enter the number
of the slot where
the module is
installed.
12 DECrepeater 900TM Installation and Configuration
Configuring the Module (Cont.)
Start Redirect Mode
TheStart Redirect Mode optionredirects theDEChub900HubManagersetup
port to the setup port of any network module that supports this function (such as the
DECrepeater 900TM) that is installed into the DEChub 900. Choosing this option
allowsyou to configure orobtainstatus of aninstalled network moduleby accessing
the specified network module’s installation menu.
After you choose the Start Redirect Mode option from the DEChub 900
MultiSwitch INSTALLATION MENU,the screen prompts you for a slot number
as shown in the following example.
Thefollowingexampleshowshowtoselectaslotnumber(userresponseisshownin
boldface type):
Enter selection: 13
Enter the slot number for redirection (1–8): 3 Return
Setup port redirected to 3: DECrepeater 900TM
Attempting to connect ...
Connection successful!
After you press Return , the DECrepeater 900TM INSTALLATION MENU appears
on your screen. Go to the section titled DECrepeater 900TM Installation Menu
(DEChub 900 Options).