Digital Equipment DECrepeater 900GM Operating and maintenance instructions

DECrepeater 900GM
Installation and Configuration
Part Number: EK–DETTM–IN. B01
August 1994
Thismanualdescribeshowtoinstallandconfigurethe
DECrepeater 900GM 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. DigitalEquipmentCorporation assumesno responsibility
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 the backofthisdocumentrequests yourevaluation ofthis
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 foundto complywith thelimits fora ClassA computingdevicepursuant 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 900GM Installation Menu (DEChub ONE Options) 13. . . . . .
DECrepeater 900GM Installation Menu (DEChub 900 Options) 14. . . . . . .
Description of Menu Options 15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
LED Descriptions 35. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Problem Solving Using the LEDs 37. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Normal Powerup 37. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Problem Solving 37. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

iv
Contents (Cont.)
Connector Pin Assignments 40. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Telco Connector 40. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
BN26U-03 Cable 41. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
H8571-J Adapter 42. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
H8575-A Adapter 42. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
AUI (15-pin D-Sub) Port Connector 43. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Product Specifications 44. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Associated Documents 46. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tables
1 The Downline Upgrade (DLU) Process 26. . . . . . . . . . . . . . . . . . . . . . . . .
2 Module LED States 35. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3 Problem Solving Using the LEDs 37. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4 DECrepeater 900GM Operating Specifications 44. . . . . . . . . . . . . . . . . .
5 Acoustical Specifications 45. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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 900GM Installation and Configuration 1
Introduction
The DECrepeater 900GM (also referred to in this manual as the module) is a
full-heightEthernet repeaterthatprovides24external10BaseTports and1 external
AUI port.
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). Oneor moreDECrepeater900GMmodules(up to8) canbeinstalled
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.
The front panel provides 24 10BaseT ports (on two 50-pin Telco connectors) and 1
attachment unit interface (AUI) port. The module’s front panel light-emitting diodes
(LEDs) indicate the operating status of the module, the ports, and the network.
Features
Your DECrepeater 900GM module includes the following features:
•Accessto ThinWire 10Base2 segment in the DEChub 900MultiSwitch ortothe
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.
•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.

2DECrepeater 900GM Installation and Configuration
Introduction (Cont.)
•Out-of-band management (OBM) using SNMP over Serial Line Internet Proto-
col (SLIP) through the OBM connector on the DEChub 900 or DEChub ONE
docking station in addition to 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 SNMPmanagementapplication 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 900GM Installation and Configuration
Front Panel
1) Power LED—Lightswhenthemodulehaspower.
2) Module OK LED — Lights when the module
passes self-test. If the module fails self-test, the
Module OK LED remains off.
3) Network OK LED —Indicates status of the back-
planeThinWireportontheDEChub900oroftheAUI
port on the DEChub ONE docking station.
4) NetworkActivity LED—Indicatesnetworktraffic
level.
5) PortState LEDs —TheLEDs (labeled1through12)
showstatusofportsA1toA12orportsB1toB12,de-
pending on the state of the Bank Indicator LEDs.
6) BankIndicatorLEDs—TheLEDs(labeledAandB)
lightoneatatimeforafewseconds,indicatingwhich
connector, Telco-A or Telco-B, iscurrently displaying
its port connection status on the 12 Port State LEDs.
7) AUI LEDs — The AUI Power LED ( labeled I/O) indi-
cates that the AUI port has power to supply to an ex-
ternal medium attachment unit (MAU). The AUI
Status LED (not labeled) indicates the status of the
AUI network connection.
NOTE: For more information about the
module’s LEDs, refer to the section
titled LED Descriptions.
8) Momentary LED cycle switch — Stops and starts
theLED statusscanningoftheBankIndicatorLEDs
during operation.
9) Ethernet AUI (15-pin D-Sub) port connector —
connects to an external MAU directly or by using an
AUI cable. Refer to the OPEN DECconnect Applica-
tions Guide for a list of AUI media adapters you can
use with your module.
10) Telcoconnectors—Two50-pinconnectors,Telco-A
and Telco-B, each providing 12 ports.
LKG-8758-93I
5
12
4
3
6
7
8
9
10
10

LKG-8709-93I
7
1
2
3
8
4
5
6
4DECrepeater 900GM Installation and Configuration
Back Panel
1) Locking tab —LocksthemoduleintoaDEChub900
backplane or into a 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
installed into a DEChub 900 or DEChub ONE dock-
ing station.
3) Grounding bolt — Provides a chassis grounding
connection between the module and a DEChub 900
or a 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
installedintoaDEChub900oraDEChubONEdock-
ing station.
6) Mounting tab — Secures the module to the back-
planewhenthemoduleisinstalledintoaDEChub900
or a DEChub ONE docking station.
7) Grounding fingers — Provides additional chassis
grounding between the module and a DEChub 900
or a 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
35.0 W
5 V
12 V
15 V
4.0 A
0.1 A
1.0 A
5
DECrepeater 900GM Installation and Configuration
Installing the Module
Themodulehot-swapfeatureallowsyoutoinstallthemoduleintotheDEChub900or
DEChubONEdockingstationwithout turningoffpower.Seating the moduleinitiates
the powerup sequence if enough power is available.
1Compare your module’s power
requirements with the values
shownin theHubManager status
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 900GM Installation and Configuration
Installing the Module (Cont.)
3Verify that the module’s Power
LEDlightsimmediately,andthatthe
Module OK LED lights within 1
minute.
a. The Power LED lights when
power is applied, then the mod-
ule performs a self-test.
b. After the module completes
self-test, the Module OK
LED lights and remains lit, then
theHubManagerstatusdisplay
shows:
DECrepeater 900GM
up
NOTE: If the LEDs do not operate as described, refer to the
section titled Problem Solving Using the LEDs.
4Connect the port cables.
Connect the two Telco cables and the AUI cable, then go to the section titled
Configuring the Module. See your network manager if you are not sure which
cables to connect.
NOTE: All cables should be installed, tested, and tagged at the
site, prior to this installation.
•To connect the Telco cables, go to step 5.
•To connect the AUI cable, go to step 6.
LKG–8760-93I

7
DECrepeater 900GM Installation and Configuration
Installing the Module (Cont.)
5Connect the Telco cables.
a. Insert the Telco plug into the
Telco connector on the module.
b. Using a flat-blade screwdriver,
tighten the two screws at the
ends of the plug.
NOTE: To disconnect the Telco cables, use a flat-blade
screwdriver to loosen the two screws at the ends of the
plug, then disconnect the cable.
6Connect the AUI cable.
a. Push the module’s AUI connec-
tor slide latch to the unlocked
position.
b. Insert the AUI cable plug into
the AUI connector.
c. Push the module’s AUI connec-
torslidelatchto thelockedposi-
tion.
NOTE: To disconnect the cable, push the connector slide latch
to the unlocked position, then disconnect the cable.
After all cables are installed, go to the section titled Configuring the Module.
LKG–8761-93I
Screws (2)
LKG–8762-93I
Unlocked
Locked

8DECrepeater 900GM Installation and Configuration
Removing the Module
1Disconnect all the cables from
the module.
a. To remove the AUI cable, push
the connector slide latch to the
unlockedposition,thendiscon-
nect the cable.
b. To remove the Telco cables,
use a flat-blade screwdriver to
loosen the two screws at the
ends of the plugs, then discon-
nect the cables.
2Unseat the module from the
DEChub 900.
a. Liftthereleaseleverlocatedon
thetopof theDEChub900slot.
b. Pivot the module back on its
bottom mounting tab, and dis-
engage the module from the
backplane.
LKG–8763-93I
Unlocked
Screws (2)
Mounting tab
LKG–8717-93I
Lift release lever

9
DECrepeater 900GM Installation and Configuration
Configuring the Module
Setup Port Description
The setup port (on the DEChub 900 MultiSwitch or the DEChub ONE docking
station)allowsyoutoaccessandsetDECrepeater900GMparameters.Thissection
describes how to access the module from either port and set those parameters.
NOTE: Thesetup port screen displays illustrated in thismanual
mayvaryslightlyfromtheactualscreendisplaysonyour
setup port device.
The signals from the DEChub 900 Hub Manager setup port and from the DEChub
ONEdocking station setup portconformto the EIA-232D signaling standard 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
Thesetup port on theDEChub 900 MultiSwitch orthe DEChub ONE docking station
canbeconnectedto asetupport device(aterminal orpersonalcomputer),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 900GM 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 900GM 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 900GM 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 900GM 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 900GM INSTALLATION MENU ap-
pears. Go to the section titled DECrepeater 900GM Installation Menu
(DEChub ONE Options).
b. If the setup port device 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 900GM Installation and Configuration
Configuring the Module (Cont.)
Start Redirect Mode
TheStart Redirect Mode optionredirectsthe DEChub900HubManagersetup
port to the setup port of any network module that supports this function (such as the
DECrepeater 900GM) that is installed into the DEChub 900. Choosing this option
allowsyouto configure orobtain status of an installednetworkmoduleby 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 900GM
Attempting to connect ...
Connection successful!
After you press Return , the DECrepeater 900GM INSTALLATION MENU appears
on your screen. Go to the section titled DECrepeater 900GM Installation Menu
(DEChub 900 Options).