Digital Equipment DECrepeater 90FS Installation And Configuration Manual

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DECrepeater 90FS Installation and Configuration

Part Number: EK–DEFMI–IN. A01

August 1994

This manual describes how to install and configure the DECrepeater 90FS module.

Revision/Update Information: This is a new manual.

August 1994

The information in this document is subject to change without notice and should not be construed as a commitment by Digital Equipment Corporation. Digital Equipment Corporation assumes no responsibility for any errors that may appear in this document.

The postage-paid Reader’s Comments form at the back of this document requests your evaluation of this document to assist us in preparing future documentation.

The following are trademarks of Digital Equipment Corporation: DEC, DECconnect, 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.

ST is a registered trademark of American Telephone and T elegraph Company. FCC NOTICE — Class A Computing Device:

This equipment generates, uses, and may emit radio frequency energy. The equipment has been type tested and found to comply with the limits for a Class A computing device pursuant to Subpart J of Part 15 of FCC Rules, which are designed to provide reasonable protection against such radio frequency interference when operated in a commercial environment. Operation of this equipment in a residential area 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 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.

Read the instructions for correct handling. CE NOTICE – Class A Computing Device:

Warning! 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.

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 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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

Back Panel 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Installing the Module 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Installing the Module as a Standalone Unit 5. . . . . . . . . . . . . . . . . . . . . . . .

Removing the Back Cover 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Installing the Module into a DEChub 900 9. . . . . . . . . . . . . . . . . . . . . . . . .

Installing the Module into a DEChub 90 11. . . . . . . . . . . . . . . . . . . . . . . . . .

Connecting the Cables 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Removing the Module 16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Configuring the Module 18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Setup Port Description 18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Setup Port Device Cabling 18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Accessing the Setup Port 19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Start Redirect Mode 21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

DECrepeater 90FS Installation Menu (DEChub 90/Standalone Options) 22

DECrepeater 90FS Installation Menu (DEChub 900 Options) 23. . . . . . . . .

Description of Menu Options 24. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

LED Descriptions 47. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Problem Solving Using the LEDs 48. . . . . . . . . . . . . . . . . . . . . . . . . . . .

Normal Powerup 48. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Connector Pin Assignments 51. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

AUI (15-pin D-Sub) Connector 51. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Serial Port (8-pin MJ) Connector 51. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

H8571-J Adapter 52. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

H8575-A Adapter 52. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Contents (Cont.)

H8585-AC Adapter 53. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

H8584-AA Adapter 53. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

H8585-AA Adapter 54. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Redundant Fiber-Optic Link Configuration 55. . . . . . . . . . . . . . . . . .

Redundant Fiber-Optic Link Overview 55. . . . . . . . . . . . . . . . . . . . . . . . . . .

Redundant Fiber-Optic Link Components 55. . . . . . . . . . . . . . . . . . . . . . . . .

Redundant Fiber-Optic Link Operation 57. . . . . . . . . . . . . . . . . . . . . . . . . .

Simple Redundant Link Configuration 58. . . . . . . . . . . . . . . . . . . . . . . . . . .

Complex Redundant Link Configuration 59. . . . . . . . . . . . . . . . . . . . . . . . .

Partial Fault Detection 60. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Full Fault Detection 61. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Recommendations for Redundant-Link Configuration 62. . . . . . . . . . . . . . .

Fiber-Optic Loss Budget 63. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

10BaseFL Loss Budget 63. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

FOIRL Compatibility 64. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Product Specifications 66. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Associated Documents 68. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Tables

1 DLU Process Description 35. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2 Module LED States 47. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3 Problem Solving Using the LEDs 48. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4 Partial Fault Detection Versus Full Fault Detection 62. . . . . . . . . . . . . . .

5 10BaseFL Worst-Case Loss Budget 63. . . . . . . . . . . . . . . . . . . . . . . . . . .

6 FOIRL Worst-Case Loss Budget 64. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7 DECrepeater 90FS Best-Case Maximum Launch Power 65. . . . . . . . . . .

8 Operating Specifications 66. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

9 Acoustical Specifications 67. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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 détério-

ration du matériel.

AVISO Contiene información para evitar daños personales.

PRECAUCION

Contiene información para evitar daños al equipo.

Safety

(Cont.)

The cautions that must be observed for the hardware described in this manual are listed below in English, German, French, and Spanish. The pages on which these safety messages appear are also listed.

WARNING

Some fiber optic equipment can emit laser or infrared light that can injure your eyes. Never look into an optical fiber or connector port. Always assume the cable is connected to a light source. [Pages 14 and 16.]

VORSICHT Bestimmte Lichtleitergeräte können für die Augen

gefährliches Laser– oder Infrarotlicht abstrahlen. Vermeiden Sie es daher unter allen Umständen, direkt in ein Lichtleiterkabel oder einen Lichtleiteranschluß zu schauen. Gehen Sie immer davon aus, daß Lichtleiterkabel mit einer Lichtquelle verbunden sind.

DANGER Certains équipements à fibre optique peuvent émettre un

rayonnement laser ou infra–rouge pouvant provoquer des troubles oculaires. Ne regardez jamais à l’intérieur d’une fibre optique ou d’un port de connecteur. Considérez que le câble est connecté en permanence à une source lumineuse.

AVISO Ciertos equipos de fibras ópticas pueden emitir luz lasérica

o infrarroja con riesgos de lesiones en los ojos. No se debe nunca mirar en una fibra óptica o una puerta de conexión. Siempre hay que suponer que el cable está conectado a una fuente luminosa.

vii

Safety

(Cont.)

CAUTION

This action deletes all configured settings and replaces them with factory default values. All configuration settings will be lost. [Page 25.]

ACHTUNG Bei diesem Vorgang werden alle Konfigurationseinstel-

lungen gelöscht und die Werkseinstellungen wieder eingesetzt. 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 configuración y los sustituirá por valores por defecto definidos de fábrica. Se perderán todos los parámetros de configuración.

viii

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 34, 36, and 39.]

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 Systemeinheit 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 processus DLU. Ne mettez pas l’unité hors tension et n’exécutez aucune action risquant d’entraîner une coupure d’alimentation au cours de cette étape.

PRECAUCION

Si se interrumpe el suministro eléctrico durante la Etapa 3 del proceso DLU, puede dañarse la imagen del firmware. No se debe apagar la unidad ni realizar ninguna operación que pueda causar una interrupción del suministro de la unidad durante la Etapa 3 del mencionado proceso.

1DECrepeater 90FS Installation and Configuration

Introduction

The DECrepeater 90FS (also referred to in this manual as the module) is an Ethernet repeater that provides two external 10BaseFL fiber-optic ports and one external AUI port.

In this manual, the term 10BaseFL refers to the International Standards Organization (ISO) 8802-3/ANSI/IEEE 802.3 fiber-optic local area networks (LAN) standards.

In this manual, the term Ethernet is Digital’s term for its product compatibility with the ISO 8802-3/ANSI/IEEE 802.3 standards and the Ethernet standards for Carrier Sense Multiple Access with Collision Detection (CSMA/CD) 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 DEChub 900), into a DEChub 90, or as a standalone unit. One or more (up to eight) can be installed into a DEChub 900.

When installing the module into a DEChub 900 or in a DEChub 90, the module’s hot-swap capability allows you to install or remove the module without turning off power.

The module provides a side panel ThinWire port connector, used when the module is installed as a standalone unit. The module provides a ThinWire port connection to the backplane when the module is installed in a DEChub 900 or a DEChub 90.

The module’s front panel provides two fiber-optic ports that can operate independently or as a redundant pair, and one attachment unit interface (AUI) port. The front panel also provides light-emitting-diodes (LEDs) that indicate the status of the module, the ports, and the network.

The module includes a serial port on the front panel that can be used as an installation setup port when the module is installed into a DEChub 90 or installed as a standalone unit. Using the setup menu, you can enable the module’s front panel serial port for Out-of-Band Management (OBM).

NOTE: When the module is installed in a DEChub 900, you

must use the Hub Manager setup port on the DEChub 900 instead of the module’s setup port.

DECrepeater 90FS Installation and Configuration

Introduction (Cont.)

Features

Your DECrepeater 90FS module includes the following features:

• ThinWire, 10Base2 port available as an external connection on the module side

panel (when the module is installed as a standalone unit) or to the backplane segment in a DEChub 900 or a DEChub 90.

• Backplane access to another Ethernet LAN through a single flexible channel in a

DEChub 900.

• Automatic module self-test at powerup.

• Port-level packet address security.

• In-band Simple Network Management Protocol (SNMP) management.

• OBM using SNMP over Serial Line Internet Protocol (SLIP) provides an addi-

tional path to the normal in-band management as follows:

– Through the OBM connector on the DEChub 900 Hub Manager – Through the front-panel serial port on the module when the module is

installed into a DEChub 90 as a standalone unit.

• Built-in SNMP agent supports the following management information bases

(MIBs):

– Ethernet-like Interface Type MIB (RFC 1398) – Internet Engineering Task Force (IETF) Repeater MIB (1516) – Digital Extended Repeater MIB – DEChub 900 Public Common MIB – MIB II (RFC 1213)

• Manageability using any generic SNMP management application that supports

the MIBs listed above.

• Upgradeable device firmware (in nonvolatile Flash memory) using Trivial File

Transfer Protocol (TFTP) with Digital’s Network Device Upgrade (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.

3DECrepeater 90FS Installation and Configuration

Front Panel

1) Power

LED — Lights when the module has

5 volts of power.

2) Module OK

LED — Lights when the the

module passes self-test.

3) Network Activity

LED — Indicates

network traffic level.

4) Network OK

LED — Indicates the status

of either the side panel or backplane ThinWire, 10Base2 port.

5) Redundancy Enabled

LED — Lights when the

fiber-optic ports are operating as a redundant pair.

6) Port State LEDs — The LEDs (labeled 1 through

3) show the attachment status of the associated port

to a LAN.

7) Port Link LEDs — Light when fiber-optic cables of the associated port are properly connected to a functional remote fiber-optic device.

NOTE: Refer to the section titled LED

Descriptions for more information about LED operation.

8) Ethernet address label — Shows the Ethernet address of the module.

9) Fiber-optic TX

port ST-type connectors —

Connect fiber-optic cables to the receive ports of the remote fiber-optic device.

10) Fiber-optic RX

port ST-type connectors —

Connect fiber-optic cables to the transmit ports of the remote fiber-optic device.

11) Ethernet AUI (15-pin D-Sub) port connector — connects to an external medium attachment unit (MAU) directly or by using an AUI cable.

12) Serial port (8-pin MJ) connector — Multiplexed port can be used as a setup port or for OBM.

13) Cooling fan unit — Provides air circulation.

14) ThinWire port connector — Connects through a

BNC T-connector when module is operating as a standalone unit.

LKG-8817-93I

Side view

2 3

7 7

1 4 5

DECrepeater 90FS Installation and Configuration

Back Panel

1) Locking tab — Locks the module into a

DEChub 900 or DEChub 90 backplane.

2) 48-pin connector — Provides network and power connections to the module when the module is installed into a DEChub 900 or a DEChub 90.

3) Grounding bolt — Provides a chassis grounding connection to the module when the module is installed into a DEChub 900 or a DEChub 90.

4) Power connector — Receives dc current from the power supply. This feature is used for standalone operation only.

5) Manufacturing label — Lists the module part number, serial number, revision level, and power requirements.

6) Mounting tab — Secures the module to the backplane when the module is installed into a DEChub 900 or a DEChub 90.

7) Cooling fan unit — Provides air circulation.

8) Back cover — The back cover is used only

when the module is a standalone unit.

LKG-8881-93I

5DECrepeater 90FS Installation and Configuration

Installing the Module

You can install the DECrepeater 90FS as a standalone unit, or you can install the module into a DEChub 900 MultiSwitch or DEChub 90. For installation instructions, refer to the following table.

If...

And... Then...

You are installing the module as a standalone unit.

Go to the section titled Installing the Module as a Standalone Unit.

You are installing the module into a DEChub 900 or a DEChub 90.

Your module has a back cover.

Go to the section titled Removing the Back Cover.

You are installing the module into a DEChub 900.

Your module does not have a back cover.

Go to the section titled Installing the Module into a DEChub 900.

You are installing the module into a DEChub 90.

Your module does not have a back cover.

Go to the section titled Installing the Module into a DEChub 90.

Installing the Module as a Standalone Unit

You can use the DECrepeater 90FS as a standalone unit by placing it onto a table, mounting it onto a wall, or installing it into a standard 19-inch rack using a shelf assembly (Digital Part Number: H9544–MS).

6 DECrepeater 90FS Installation and Configuration

Installing the Module

Installing the Module as a Standalone Unit

NOTE: Install the module horizontally to ensure that the fans

have at least 2 inches of clearance.

1 Connect the ThinWire

T-connector:

a. Attach the ThinWire T-connec-

tor to the BNC connector and turn the connector one-quarter turn to the right until the connector locks into place.

b. Attach the ThinWire backbone

segment to one of the BNC connectors on the T-connector.

c. Install a terminator on the other

end of the T–connector, or connect a ThinWire cable to another 10Base2 device.

NOTE: To disconnect the ThinWire

T-connector, turn the connector one-quarter turn to the left until the connector clears the BNC connector stem, then disconnect the cable.

2 Connect the power cable.

a. Connect the cable from the

power supply (Digital Part Number: H7827-BA) to the power connector on the back of the module.

b. Plug the power supply cable

into the power supply, then into a wall outlet.

LKG-9174-93I

7DECrepeater 90FS Installation and Configuration

Installing the Module (Cont.)

Installing the Module as a Standalone Unit (Cont.)

3 Verify that the module’s Power

LED lights immediately and

that the Module OK

LED lights

within 1 minute.

a. The Power

LED lights when power is applied, then the module performs a self-test.

b. After the module completes the

self-test, the Module OK LED lights and remains lit.

NOTE: If the LEDs do not operate as described, refer to the

section titled Problem Solving Using the LEDs.

Go to the section titled Connecting the Cables.

LKG–8820-93I

8 DECrepeater 90FS Installation and Configuration

Installing the Module (Cont.)

Removing the Back Cover

Remove the back cover if you are installing a module into a DEChub 900 or into a DEChub 90.

1 Lift up the latch on the back cover

by inserting a flat-blade screwdriver into the top mounting hole.

2 With the latch up, pull the top of

the back cover away, pivoting at the bottom of the module.

3 To install the module:

• Into a DEChub 900, go to the

section titled Installing the Module into a DEChub 900.

• Into a DEChub 90, go to the

section titled Installing the Module into a DEChub 90.

LKG-8818-93I

9DECrepeater 90FS Installation and Configuration

Installing the Module (Cont.)

Installing the Module into a DEChub 900

The DECrepeater 90FS hot-swap feature allows you to install the module into the DEChub 900 without turning off power. Seating the module initiates the powerup sequence.

1 Compare your module’s power

requirements with the values shown in the Hub Manager status display (see examples).

NOTE: The 12-volt power in the DEChub 900 is derived from the

15-volt power source.

2 Seat 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

mounting tab and align the connectors.

c. Firmly push the module onto the

backplane connectors until the release lever clicks.

d. Press down on the release lever

to ensure that it is locked.

Module’s Manufacturing Label (Example)

If any of the module’s power requirements exceed the values shown in the status display, add another power supply (see the

DEChub 900 MultiSwitch Owner’s Manual).

Hub Manager Status Display (Example)

LKG–9540–94I

Available: 90.5 W

5V: 13.0 A, 15V: 3.5 A

A01 AS41601069 C–208/90

REV SN FTZ

–DEFMI–M

5Vdc,1.5; 12Vdc, .5A, 15W

LKG–8727-93I

Mounting tab

Release lever clicks when module is seated.

10 DECrepeater 90FS Installation and Configuration

Installing the Module (Cont.)

Installing the Module into a DEChub 900 (Cont.)

3 Verify that the module’s Power

LED lights immediately and

Module OK

LED lights within

1 minute.

a. The Power LED lights when

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 90FS up.

NOTE: If the LEDs do not operate as described, refer to the

section titled Problem Solving Using the LEDs.

Go to the section titled Connecting the Cables.

LKG–9550-94I

11DECrepeater 90FS Installation and Configuration

Installing the Module (Cont.)

Installing the Module into a DEChub 90

The DECrepeater 90FS hot-swap feature allows you to install the module into the DEChub 90 without turning off power. Seating the module initiates the powerup sequence. Install the module into slot 7 or 8 only.

NOTE: Ensure that the fans have at least 2 inches of

clearance.

1 Install the module into the

DEChub 90.

a. Place the module’s mounting

tab into slot 7 or 8 only on the DEChub 90. Only slots 7 and 8 provide the 12 volts required by the DECrepeater 90FS.

b. Pivot the module on the mount-

ing tab and align the connectors.

c. Firmly push the module onto the

backplane connectors until the release lever clicks.

d. Press down on the release lever

to ensure that it is locked.

LKG–8837-93I

Mounting tab

Release lever clicks when module is seated.

12 DECrepeater 90FS Installation and Configuration

Installing the Module (Cont.)

Installing the Module into a DEChub 90 (Cont.)

2 Verify that the module’s Power

LED lights immediately and

that the Module OK

LED lights

within 1 minute.

a. The Power LED lights when

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.

NOTE: If the LEDs do not operate as described, refer to the

section titled Problem Solving Using the LEDs.

Go to the section titled Connecting the Cables.

LKG–9550-94I

13DECrepeater 90FS Installation and Configuration

Installing the Module (Cont.)

Connecting the Cables

1 Determine the fiber-optic port configuration

Before connecting the fiber-optic cables, determine whether the ports are to be configured as redundant pairs or as separate independent ports. The default configuration is separate independent ports.

Refer to the section titled Redundant Fiber-Optic Link Configuration for more information. (Refer also to HUBwatch Online Help.)

If you are configuring the fiber-optic ports as:

• Redundant pairs, go to step 2.

• Separate independent ports, go to step 3.

2 Connect the fiber-optic cables for redundancy

NOTE: You must configure the ports using HUBwatch before

connecting the cables. Failure to do so can create a LAN loop which could bring down that segment of the network.

a. Select the module and ports to use as the master and the modules and ports

to use as the responders or non-responders.

b. Using HUBwatch, assign the master ports and the responder ports. c. Following the procedure in step 3, connect the master’s primary port cables

to the master’s primary port.

d. Connect the other end of those cables to the remote primary port. e. Connect the master’s secondary port cables to the master’s secondary port. f. Connect the other end of those cables to the remote secondary port.

14 DECrepeater 90FS Installation and Configuration

Installing the Module (Cont.)

Connecting the Cables (Cont.)

If your site is prewired, the fiber-optic cables should be labeled with information on size and attenuation characteristics. Digital recommends that you use

62.5/125-micron multimode graded index fiber-optic cable with the DECrepeater 90FS. Refer to the section titled Fiber-Optic Loss Budget for more information.

WARNING

Some fiber-optic equipment can emit laser or infrared light that can injure your eyes. Never look into an optical-fiber or connector port. Always assume the cable is connected to a light source.

NOTE: To prevent cable damage, avoid making sharp bends

and kinks in the cable.

3 Connect the fiber-optic cables.

a. Remove the dust caps from the

ST-type connectors on the ports that you are connecting.

b. Align the tab and slot of the

transmit cable plug with the slot and tab of the transmit port connector (labeled

c. Insert the plug, then push the

plug sleeve in and turn it to the right, locking it in place.

d. Connect the receive cable, in

the same way, to the receive port connector (labeled

NOTE: To disconnect the cables, push the plug’s sleeve in and

turn it to the left, then disconnect the cable.

Slot

Tab

Slot

Tab

Sleeve

LKG–8836-93I

15DECrepeater 90FS Installation and Configuration

Installing the Module (Cont.)

Connecting the Cables (Cont.)

4 Connect the AUI cable.

a. Push the module’s AUI con-

nector slide latch to the unlocked position.

b. Insert the AUI cable plug into

the AUI connector.

c. Push the module’s AUI con-

nector slide latch to the locked position.

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–8819-93I

Unlock

Lock

16 DECrepeater 90FS Installation and Configuration

Removing the Module

WARNING

Some fiber-optic equipment can emit laser or infrared light

that can injure your eyes. Never look into an optical-fiber or connector port. Always assume the cable is connected to a light source.

1 Disconnect the cables from the

module.

a. To disconnect the fiber-optic

cables, push the plug’s sleeve in and turn it to the left, then disconnect the cable.

b. To disconnect the AUI connec-

tor, push the connector slide latch to the unlocked position, then disconnect the cable.

LKG–8822-93I

Unlock

Tab

Slot

Tab

Sleeve

Slot

17DECrepeater 90FS Installation and Configuration

Removing the Module (Cont.)

2 Unseat the module from the

DEChub900 or the DEChub 90.

a. Lift the release lever located on

the top of the DEChub 900 slot or the DEChub 90 slot.

b. Pivot the module back on its

bottom mounting tab, and disengage the module from the backplane.

LKG–8731-93I

Mounting tab

Lift release lever

LKG–8838-93I

Mounting tab

Lift release lever

18 DECrepeater 90FS Installation and Configuration

Configuring the Module

Setup Port Description

The setup port on the DEChub 900 MultiSwitch or on the module’s front-panel serial port (when the module is operating as a standalone unit or in a DEChub 90) allows you to access and set DECrepeater 90FS parameters. This section describes how to access the module from either port and set those parameters.

NOTE: The setup port screen displays illustrated in this manual

may vary slightly from the actual screen displays on your setup port device.

The signals from the DEChub 900 Hub Manager setup port and from the DECrepeater 90FS front-panel serial port conform to the EIA-232D signaling standard at 9600 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 and the DECrepeater 90FS front-panel serial port.

Setup Port Device Cabling

The front-panel serial port on the module or the Hub Manager setup port on the DEChub 900 can be connected to a setup port device (a terminal or personal computer), using the following cables and adapters (not included in the shipping kit).

Cable/Adapter Type

Connecting Setup Port Device

BN24H-xx

A 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

xx indicates cable length in meters.

DECrepeater 90FS Installation and Configuration 19

Configuring the Module (Cont.)

Accessing the Setup Port

To use one of the ports to configure the 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 as follows: a. If you are installing the module into a DEChub 900, connect the setup port

device cable to the setup port on the DEChub 900 (see illustration).

b. If you are installing the module into a DEChub 90 or as a standalone unit,

connect the setup port device cable to the front-panel serial port on the module (see illustration).

Setup port

DECrepeater 90FS

front-panel serial port

DEChub 900 MultiSwitch

H8571-J

H8575-A

To setup port device

BN24H cable

H8571-J

H8575-A

To setup port device

LKG-8825-94I

BN24H cable

3. Press

Return

on the setup port device a few times until a menu appears.

Choose option 13, then go to the section titled Start Redirect Mode.

The DECrepeater 90FS 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.

20 DECrepeater 90FS Installation and Configuration

Configuring the Module (Cont.)

a. If the setup port device is connected to the module’s front-panel serial

port, the DECrepeater 90FS INSTALLATION MENU appears. Go to the section titled DECrepeater 90FS Installation Menu (DEChub90/Standalone 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.

DECrepeater 90FS Installation and Configuration 21

Configuring the Module (Cont.)

Start Redirect Mode

The Start Redirect Mode option redirects the DEChub 900 Hub Manager setup port to the setup port of any network module that supports this function (such as the DECrepeater 90FS) that is installed in the DEChub 900. Choosing this option allows you to configure or obtain status of an installed network module by accessing the module’s installation menu.

After you choose the Start Redirect Mode option from the Hub Manager Installation menu, the screen prompts you for a slot number, as shown in the following code example.

The following example shows how to select a slot number (user response is shown in boldface type):

Enter selection: 13

Enter the slot number for redirection: (1–8): 3

Return

Setup port redirected to 3: DECrepeater 90FS Attempting to connect ...

Connection successful!

After you press

Return

, the DECrepeater 90FS INSTALLATION MENU appears on your screen. Go to the section titled DECrepeater 90FS Installation Menu (DEChub 900 Options).

Choose an option, then go to the section titled Description of Menu Options.

If you need to assign an IP address to the module, choose this option.

22 DECrepeater 90FS Installation and Configuration

Configuring the Module (Cont.)

DECrepeater 90FS Installation Menu (DEChub 90/Standalone Options)

This section lists the options available from the DECrepeater 90FS INSTALLATION MENU when the module is installed into a DEChub 90 or as a

standalone unit. The following is an example of the DECrepeater 90FS INSTALLATION MENU:

DECrepeater 90FS

DECrepeater 90FS 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] Set In-Band Interface Default Gateway Address [10] Downline Upgrade [11] Set Out-of-Band Management (OBM)Interface IP Address [12] Set Out-of-Band Management (OBM) Port Speed [13] Module-Specific Options

Enter selection : 1

Return

Choose an option, then go to the section titled Description of Menu Options.

If you need to assign an IP address to the module, choose this option.

Indicates the DEChub slot number where the module is installed.

DECrepeater 90FS Installation and Configuration 23

Configuring the Module (Cont.)

DECrepeater 90FS Installation Menu (DEChub 900 Options)

This section shows the options available from the DECrepeater 90FS Installation Menu when the module is installed into the DEChub 900.

The following is an example of the DECrepeater 90FS Installation Menu:

DECrepeater 90FS – Slot 3

DECrepeater 90FS INSTALLATION MENU

[1] Reset with Factory Default [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] Set In-Band Interface Default Gateway Address [10] Downline Upgrade

[Ctrl/C] Return to DEChub 900 MultiSwitch INSTALLATION MENU

Enter selection : 1

Return

24 DECrepeater 90FS Installation and Configuration

Configuring the Module (Cont.)

Description of Menu Options

This section describes the menu options that are available from the DECrepeater 90FS Installation Menu. Note that the out-of-band management options

apply to the module only when it is installed into a DEChub 90 or it is in standalone mode.

[1] Reset with Factory Defaults

This option resets the module, causing most of the module’s configured NVRAM parameters to be initialized to factory default values.

Following are some examples of the module’s configured NVRAM parameters that are reset to factory defaults:

• SNMP read/write community –– this name is reset to PUBLIC.

• SNMP trap addresses ––all SNMP trap addresses are deleted.

• In-band interface IP address –– this address is deleted.

• In-band interface default gateway address –– this address is deleted.

• Out-of-band interface IP address –– this address is deleted.

• Out-of-band interface port speed –– reset to 9600.

Following are the only parameters that are not reset:

• Serial number

• Reset count

• Error log data

DECrepeater 90FS Installation and Configuration 25

Configuring the Module (Cont.)

[1] Reset with Factory Defaults (Cont.)

CAUTION

This action deletes all configured settings and replaces them with factory default values. All configuration settings will be lost.

NOTE: Allow approximately 1 minute for the module to reset

and complete self-test.

The following is an example of the dialog associated with this option (user response is shown in boldface type):

Enter selection : 1

DECrepeater 90FS – slot 7

RESET WITH FACTORY DEFAULTS * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *

* IMPORTANT! IMPORTANT! IMPORTANT! * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * This selection will delete the current configuration * * settings and reset the system with the factory default * * settings. All configuration settings will be lost. * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *

Press Y to confirm [N] :

Return

Press Return for Main Menu ...

26 DECrepeater 90FS Installation and Configuration

Configuring the Module (Cont.)

[2] Reset with Current Settings

This option resets the module but leaves the module’s configured NVRAM parameters at their current values.

NOTE: Allow approximately 1 minute for the module to reset

and complete self-test.

The following is an example of the dialog associated with this option (user response is shown in boldface type):

Enter selection : 2

DECrepeater 90FS – slot 3

RESET WITH CURRENT SETTINGS This selection will reset your system with the

current configuration settings.

Press Y to confirm [N] :

Return

Press Return for Main Menu ...

DECrepeater 90FS Installation and Configuration 27

Configuring the Module (Cont.)

[3] Show Current Settings

This option shows the module’s current settings.

NOTE: If the module is being configured for the first time some

fields are blank.

The following is an example of the display associated with this option:

Enter selection : 3

DECrepeater 90FS Slot 3

DECrepeater 90FS, 2 port FO Ethernet Rptr SNMP HW=v2 RO=v01 SW=v1.1 SysUpTime : 01:36:00 SNMP Read/Write Community : public SNMP Trap Addresses : Not Configured Status of last downline upgrade : No Status In Band Interface Hardware Address : 08–00–2B–A3–4C–70 In-Band Interface IP Address : 16.20.216.179 In-Band Interface Default Gateway Address : Not Configured

Press Return to Continue ...

28 DECrepeater 90FS Installation and Configuration

Configuring the Module (Cont.)

[4] Set SNMP Read/Write Community

This option prompts you to enter the module’s read/write community name. The format for a community name is a string consisting of 4 to 31 printable ASCII

characters. This community name can be used by SNMP managers for read/write access control.

The following is an example of an SNMP read/write community name: tony1970 The following is an example of the dialog associated with this option (user response

is shown in boldface type):

Enter selection : 4

DECrepeater 90FS Slot 3

SET SNMP READ/WRITE COMMUNITY

Format: The format for a community name is a string, consisting of four to thirty–one printable ASCII characters, that describes the relationship between an SNMP agent and one or more SNMP managers. The string defines the authentication mechanism that is employed to validate the use of the community by the sending SNMP entity.

Enter the community string [public] : tony1970

Return

SNMP Read/Write community string set.

Press Return for Main Menu ...

Appears only if the module has been previously configured.

Enter the SNMP trap address that you have chosen, then press Return.

Appears only if the module has been previously configured.

DECrepeater 90FS Installation and Configuration 29

Configuring the Module (Cont.)

[5] Add SNMP Trap Addresses

This option prompts you to enter IP addresses to which SNMP traps will be sent from the module.

The format for an SNMP trap address is the standard 4-octet dotted decimal notation, where each octet of the address is represented as a decimal value, separated by a decimal point (.).

The following is an example of an SNMP trap address: 16.20.54.156 The following is an example of the dialog associated with this option (user response

is shown in boldface type):

Enter selection : 5

DECrepeater 90FS – slot 3

ADD SNMP TRAP ADDRESSES

Format: The standard 4 octet dotted decimal notation in which each octet of the address is represented as a decimal value, separated by a ’.’ character.

example: 16.20.54.156

Configured SNMP Trap Addresses: 16.20.216.81

Trap address [] : 16.20.54.156

Return

Trap address added! Add another? [] :

Return

Press Return for Main Menu ...

Appears only if the module has been previously configured.

Enter the SNMP trap address that you have chosen for deletion, then press Return.

30 DECrepeater 90FS Installation and Configuration

Configuring the Module (Cont.)

[6] Delete SNMP Trap Addresses

This option prompts you to select SNMP trap addresses for deletion. The format for an SNMP trap address is the standard 4-octet dotted decimal notation,

where each octet of the address is represented as a decimal value, separated by a decimal point (.).

The following is an example of an SNMP trap address: 16.20.54.156 The following is an example of the dialog associated with this option (user response

is shown in boldface type):

Enter selection : 6

DECrepeater 90FS – slot 3

DELETE SNMP TRAP ADDRESSES

Format: The standard 4 octet dotted decimal notation in which each octet of the address is represented as a decimal value, separated by a ’.’ character.

example: 16.20.40.156

Configured SNMP Trap Addresses: 16.20.216.81

Trap address [] : 16.20.216.81

Return

Trap address deleted. Delete another? [] :

Return

Press Return for Main Menu ...

DECrepeater 90FS Installation and Configuration 31

Configuring the Module (Cont.)

[7] Dump Error Log

This option displays error log dumps for use by Digital support personnel when analyzing system faults. Up to four error log dumps can be stored, and the most recent dump is displayed first.

The following is an example of the display associated with this option:

Enter selection : 7

DECrepeater 90FS Slot 3

DUMP ERROR LOG

CURRENT RESET COUNT: 14

Entry # = 3 Timestamp = 0 0 791 Reset Count = 13 Trap @315 in console_cfg.c Backplane clock failure

Dump another entry Y/[N]? N

Return

No more Error Log entries.

Press Return for Main Menu ...

This cell data represents a previously set IP address. During the initial setup, this cell default appears as [].

Enter the module’s IP address, then press Return.

32 DECrepeater 90FS Installation and Configuration

Configuring the Module (Cont.)

[8] Set In-Band Interface IP Address

This option prompts you to enter the module’s IP address. The format for an IP address is the standard 4-octet dotted decimal notation, where

each octet of the address is represented as a decimal value, separated by a decimal point (.).

The following is an example of an IP address: 16.20.54.156 The following is an example of the dialog associated with this option (user response

is shown in boldface type):

Enter selection : 8

DECrepeater 90FS – slot 3

SET IN-BAND INTERFACE IP ADDRESS

Format: The standard 4 octet dotted decimal notation in which each octet of the address is represented as a decimal value, separated by a ’.’ character.

example: 16.20.40.156

To delete the IP address, enter 0 in the appropriate address field.

IP address [16.20.216.179] : 16.20.54.156

Return

IP Address set

Press Return for Main Menu ...

Enter the module’s default gateway IP address, then press Return.

DECrepeater 90FS Installation and Configuration 33

Configuring the Module (Cont.)

[9] Set In-Band Interface Default Gateway Address

This option prompts you for a default gateway IP address. The default gateway address is needed only to deliver traps to a management station that is not on the local subnet.

NOTE: The module does not need to be configured with a

subnet mask for SNMP communications with a management station that is located on any subnet in the IP network.

The following is an example of a default gateway IP address: 16.07.80.156 The following is an example of the dialog associated with this option (user response

is shown in boldface type):

Enter selection : 9

DECrepeater 90FS – slot 3

SET IN-BAND INTERFACE DEFAULT GATEWAY ADDRESS

Format: The standard 4 octet dotted decimal notation in which each octet of the address is represented as a decimal value, separated by a ’.’ character.

example: 16.20.40.156

To delete the IP address, enter 0 in the appropriate address field.

Default Gateway address [] : 16.07.80.156

Return

Default Gateway Address set

Press Return for Main Menu ...

34 DECrepeater 90FS Installation and Configuration

Configuring the Module

[10] Downline Upgrade

This option allows you to upgrade the module firmware (in nonvolatile Flash memory). It prompts you to enter the load image file name and the IP address of your Trivial File Transfer Protocol (TFTP) load host.

Before initiating this option, be sure that the module that you are upgrading has been configured with an IP address. If the module is not configured with an IP address, select the Set In-Band Interface IP Address option (option [8] ) from the DECrepeater 90FS Installation Menu to set an IP address.

Do not use the DEChub 900 MultiSwitch Hub Manager’s IP address to upgrade the DECrepeater 90FS.

NOTE: The module’s IP address is retained at the completion of

the downline upgrade.

The following is an example of an image file name and an IP address: defmi110.bin and 16.20.54.156

When the screen prompts you to Enter the Load Filename, do the following:

• If the file is located in the default TFTP directory, enter only the filename.

• If the file is not located in the default TFTP directory, enter the complete

pathname along with the filename.

The format of the image file name is specified according to the conventions used by your TFTP load host.

CAUTION

The Downline Upgrade (DLU) Process

The DLU process consists of four stages:

• Stage 1 — Transferring Firmware Image

• Stage 2 — Verifying Firmware Image

• Stage 3 — Writing New Firmware Image into Nonvolatile Storage

• Stage 4 — Module Reset and Self-Test

The following table explains what happens during each stage of the DLU process.

DECrepeater 90FS Installation and Configuration 35

Configuring the Module (Cont.)

[10] Downline Upgrade (Cont.)

Table 1 DLU Process Description

Stage

What Happens

1 The new firmware image from the TFTP load host is trans-

ported across the network, and placed into a temporary storage buffer in the module.

Indications that this stage is in progress include:

• Module status — functional, but not manageable.

• Module cannot respond to management requests.

• LED display — The Power

LED remains on. The Module OK

LED turns off. The Redundancy Enabled LED lights.

• HUB Manager display — DECrepeater 90FS unknown

• Typical time to complete this stage — normally 1 minute. However, due to variances in network configurations (load path, bit rate, and traffic levels), this stage of the DLU process can take up to 10 minutes to complete.

2 The module verifies that the firmware image is correct after

Stage 1 is complete.

Indications that this stage is in progress include:

• Module status — functional, but not manageable.

• Module cannot respond to management requests.

• LED display — The Power

LED remains on. The Module OK

LED lights. The Redundancy Enabled LED turns off.

• HUB Manager display — DECrepeater 90FS unknown

• Typical time to complete this stage — normally 5 seconds. (continued on next page)

36 DECrepeater 90FS Installation and Configuration

Configuring the Module (Cont.)

[10] Downline Upgrade (Cont.)

Table 1 (Cont.) DLU Process Description

Stage

What Happens

3 The new firmware image is transferred from the module’s tem-

porary storage buffer to the Flash RAM, overwriting the old firmware image.

CAUTION

Indications that this stage is in progress include:

• Module status — functional, but not manageable.

• Module cannot respond to management requests.

• LED display — the Power

LED and the Module OK LED

remain on. The Redundancy Enabled LED lights.

• HUB Manager display — DECrepeater 90FS

unknown

• Typical time to complete this stage — normally 30 seconds.

4 The module resets, runs self-test, and then begins executing

the new firmware image.

Indications that this stage is in progress include:

• Module status — not functional during reset and self-test.

• Module cannot respond to management requests.

• LED display — the Power LED remains on. The Module OK

and the Redundancy Enabled LEDs turn off. All LEDs light momentarily. Then, all, except the Power LED, turn off.

• HUB Manager display — DECrepeater 90FS

unknown

• Typical time to complete this stage — normally 1 minute.

After the successful completion of self-test, the Module OK turns on and the module becomes fully operational and manageable. Note also that the HUB Manager display indicates:

DECrepeater 90FS

LED

DECrepeater 90FS Installation and Configuration 37

Configuring the Module (Cont.)

[10] Downline Upgrade (Cont.)

The following section explains how to use the DLU process. An (expanded) example of the setup screen displays follows the description.

Using the DLU Process

Do not use the DEChub 900 MultiSwitch Hub Manager’s IP address to upgrade the DECrepeater 90FS.

When you select the Downline Upgrade option (option [10] ) from the DECrepeater 90FS INSTALLATION MENU, the initial setup screen display appears (see the following example display). This screen identifies the option and alerts users not to interrupt power during the downline load.

Enter selection : 10

DECrepeater 90FS

DOWNLINE UPGRADE

This process upgrades the device’s firmware (in nonvolatile Flash memory). Enter the IP address of your TFTP (Trivial File Transfer Protocol) load host and the image file name when prompted.

* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * IMPORTANT! IMPORTANT! IMPORTANT! * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * If power is interrupted during the downline load, the * * firmware image can be corrupted. Do not turn off power * * to the unit or perform any action that can cause the * * unit to lose power during a downline upgrade. * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *

... Press Return Key to Continue ...

38 DECrepeater 90FS Installation and Configuration

Configuring the Module (Cont.)

[10] Downline Upgrade (Cont.)

When you press

Return

, the screen prompts you to Enter the Load Filename.

Do the following:

• If the file is located in the default TFTP directory, enter only the filename.

• If the file is not located in the default TFTP directory, enter the complete

pathname along with the filename.

The following example shows the dialog associated with this option using a file that is located in the default directory (user response is shown in boldface type):

Enter the Load Filename [] defmi110.bin

Return

After you enter the firmware image load filename and press

Return

, the screen

prompts you to enter the IP address of the TFTP server (load host):

Enter the Load Host IP Address [] :16.20.54.156

Return

After you enter the load host IP address, the following screen and dialog appear:

Load will be initiated over the Ethernet Port network interface. The device becomes nonfunctional for up to 10 minutes during the time that the flash load is in progress.

When the load is complete the screen displays the message: (Device Not Responding!) This is normal.

... Press Return Key to Start Load [Ctrl/C to abort]...

NOTE: The DECrepeater 90FS is nonfunctional only during

reset and self-test (about 1 minute of Stage 4) of the DLU process. During the first three stages of the process, the module continues to function as a repeater.

When you press

Return

, the DLU process is initiated over the Ethernet port network

interface.

Hub Manager Status Display

DECrepeater 90FS Installation and Configuration 39

Configuring the Module (Cont.)

[10] Downline Upgrade (Cont.)

After you initiate the DLU process, the screen displays the following message:

DLU process started!

NOTE: Because of variances in network configurations (load

path and traffic levels), this initial stage of the DLU process can take up to 10 minutes to complete.

CAUTION

If your module is installed into a DEChub 90 or as a standalone unit, go to the section titled DLU Process Completion.

If your module is installed into a DEChub 900, the screen displays the following message:

Module not responding! Connection closed!

This is normal. The Hub Manager status display indicates the following:

4: DECrepeater 90FS unknown

The Hub Manager status display continues to display this message until the DLU process is complete. This is normal.

40 DECrepeater 90FS Installation and Configuration

Configuring the Module (Cont.)

[10] Downline Upgrade (Cont.)

DLU Process Completion

When the DLU process is complete, the module resets and initiates self-test. After self-test completes successfully , the module exits from the DLU process and begins the execution of the new firmware image. The Module OK LED turns on and the module becomes fully operational.

The screen displays one of the following:

• If the module is installed into a DEChub 90 or as a standalone unit, the

screen displays the DECrepeater 90FS INSTALLATION MENU.

• If the module is installed into a DEChub 900, the screen displays the follow-

ing message:

Press Return for Main Menu ...

When you press

Return

, the screen displays the DECrepeater 90FS

INSTALLATION MENU.

Enter the firmware image load filename, then press Return.

Indicates that the downline upgrade loading process has been initiated.

Enter the IP address of the TFTP server, then press Return.

Module communications suspended during load process. This is normal.

The module is nonfunctional only during reset and self-test (about 1 minute of Stage 4) of the DLU process. During the first three stages of the process, the module continues to function as a repeater.

DECrepeater 90FS Installation and Configuration 41

Configuring the Module (Cont.)

[10] Downline Upgrade (Cont.)

The following illustration shows an (expanded) example of the setup screen displays:

Enter the Load Filename [] : defmi110.bin Enter the Load Host IP Address [] : 16.20.54.156

Load will be initiated over the In-Band network interface. The device becomes nonfunctional for up to 10 minutes during

the time that the flash load is in progress. When the load is complete the screen displays the message:

(Device Not Responding!) This is normal. ... Press Return Key to Start Load [Ctrl/C to abort]... DLU process started!

Module Not Responding! Connection closed!

Press Return for Main Menu ...

Enter the module’s OBM IP address, then press Return.

42 DECrepeater 90FS Installation and Configuration

Configuring the Module (Cont.)

[11] Set Out-of-Band Management (OBM) Interface IP Address

NOTE: This selection is operational only when the module is

installed into a DEChub 90 or as a standalone unit.

This option prompts you to enter the IP address of your out-of-band management interface.

This option allows you to manage your module through the front-panel serial port when the module is installed in a DEChub 90 or as a standalone unit. Y ou can enable out-of-band management in addition to normal in-band management. To enable out-of-band management, you need to assign an OBM IP address (use Option [11]) and select an OBM port speed (use Option [12]) from the DECrepeater 90FS INSTALLATION MENU.

The following is an example of the dialog associated with this option (user response is shown in boldface type):

Enter selection : 11

DECrepeater 90FS

SET OUT-OF-BAND MANAGEMENT (OBM) INTERFACE IP ADDRESS

Format: The standard 4 octet dotted decimal notation in which each octet of the address is represented as a decimal value, separated by a ’.’ character.

example: 16.20.40.156

To delete the IP address, enter 0 in the appropriate address field.

IP address [] : 16.20.54.156

Return

Press Return for Main Menu ...

The OBM port speed you select must match the speed of your OBM port device.

DECrepeater 90FS Installation and Configuration 43

Configuring the Module (Cont.)

[12] Set OBM Port Speed

NOTE: This selection is operational only when the module is

installed into a DEChub 90 or in standalone mode.

This option prompts you to select and enter the speed of your out-of-band management port.

NOTE: The port speed at each end of the communications link

must be identical.

The following is an example of the dialog associated with this option (user response is shown in boldface type):

Enter selection : 12

DECrepeater 90FS

SET OUT-OF-BAND (OBM) PORT SPEED

[1] 1200 baud [2] 2400 baud [3] 4800 baud [4] 9600 baud [5] 19200 baud [6] 38400 baud

Enter selection [2] (9600) : 2

Return

OBM port speed set.

Press Return for Main Menu ...

NOTE: The front-panel serial port, when used for OBM,

supports only 9,600 baud or higher speed modems.

44 DECrepeater 90FS Installation and Configuration

Configuring the Module (Cont.)

[13] Module-Specific Options

NOTE: The Switch to OBM option from this submenu takes

effect only when the module is installed into a DEChub 90 or in standalone mode.

This option provides module-specific selections. The sub-menu includes an option to switch to OBM. Other sub-menu items (not shown at this time) may be included in this option.

Switch to OBM

This selection allows you to switch from setup mode to OBM mode. The following is an example of the dialog associated with this option (user response

is shown in boldface type):

DECrepeater 90FS

DECrepeater 90FS Installation [1] SWITCH TO OBM

[2] Return to main menu

Enter selection [N] :1

Return

Press Y to confirm [N] : y

Return

Press Return for Main Menu ...

Switching console port to Out-of-Band Management mode

Press Return for Main Menu ...

DECrepeater 90FS Installation and Configuration 45

Configuring the Module (Cont.)

Switch to OBM (Cont.)

After selecting the option to switch to OBM mode, do the following:

1. Change the cable at either the front-panel serial port on the module or at the OBM device using one of the pair of cable/adapter pairs listed in the following table.

a. If the OBM device uses the same cable as the setup port device, discon-

nect the cable from the setup port device, and install it into the OBM device (see illustration).

b. If the OBM device uses a different cable than that used for the the setup

port device, disconnect the cable from the front-panel serial port of the module, and connect the cable from the OBM device into the front-panel serial port of the module (see illustration on the next page).

Cable/Adapter Type

Connecting OBM Device

BN25G-xx1/H8585-AC

A modem with a 25-pin D-Sub connector BN25G-xx1/8585-AA A PC with a 9-pin D-Sub communications port BN24H-xx1/8584-AA

An 8-pin MJ terminal server

xx indicates cable length in meters.

Not for connection to public networks in Sweden, Germany , or Japan.

46 DECrepeater 90FS Installation and Configuration

Configuring the Module (Cont.)

DECrepeater 90FS

Front panel serial port

H8585-AC

To OBM device

BN25G cable

LKG-8991-94I

H8585-AA

H8545-AA

*Not for connection to public networks in Sweden, Germany, or Japan

BN24H cable

2. To end OBM mode and return to setup mode, do the following: a. Connect the cable from the front-panel serial port to a setup port device.

(See the section titled Setup Port Device Cabling for more information.)

b. Recycle the power to the module.

The setup port device displays the following message:

Type ctrl-C to end Out of Band Management mode.

c. Press

Ctrl/C

on the setup port device within 30 seconds after the message

is displayed on the setup port device to end the OBM session.

DECrepeater 90FS Installation and Configuration 47

LED Descriptions

The module LEDs provide dynamic indications of module status. Flashing LEDs indicate special situations.

Table 2 shows the static states that are possible for each of the module LEDs.

Table 2 Module LED States LED Name

Icon Off On Flashing

Power No power to

module.

Module receiving power.

Faulty power connection or insufficient power.

Module OK After 1 minute,

self-test failed.

Module passed self-test.

N/A

Network OK

ThinWire 10Base2 port is not connected to a properly terminated and operational LAN.

ThinWire 10Base2 port is connected to a properly terminated and operational LAN

ThinWire 10Base2 port is disabled by network management.

Network Activity

No network activity.

The network has heavy traffic.

Flashes more rapidly and appears brighter as network traffic increases.

Redundancy Enabled

The fiber-optic ports are operating as independent ports.

The fiber-optic ports are operating as a redundant port pair in master mode.

One or both of the fiber-optic ports on the module are operating as a redundant responder.

Port State Associated port

is not properly connected to another operational network device.

Associated port is properly connected to another operational network device.

Flashing once per second indicates that the associated port is disabled by network management.

Port Link Associated

fiber-optic receiver is not detecting sufficient light or not connected.

Associated fiber-optic receiver is detecting sufficient light.

Associated fiber-optic port has an intermittent connection.

48 DECrepeater 90FS Installation and Configuration

Problem Solving Using the LEDs

When diagnosing a problem with the module, note that the problem is often indicated by the states of the module LEDs. T able 3 lists the states of the LEDs for various error conditions that can occur during initial installation of the device, along with probable causes and corrective actions to take.

Normal Powerup

When power to the module is initially turned on, the following events occur:

1. The Power LED lights and stays lit. All other LEDs light for a few seconds, then turn off. This verifies that the individual LEDs are operational (defective LEDs do not light.

2. The module initiates its built-in self-test.

3. After the successful completion of self-test (within 1 minute), the Module OK

LED lights, and remains lit.

4. The remaining LEDs indicate their operational status.

Table 3 Problem Solving Using the LEDs

Symptom Icon

Probable Cause Corrective Action

All LEDs are off.

The module does not have power.

If the module is installed as a standalone unit:

Secure the power cable at the back cover and between the power supply and the wall outlet.

Check the wall outlet using another appliance or light, or plug the power cord into another outlet. If no power is available, check the wall outlet’s circuit breaker.

If the problem persists, replace the power supply or the module.

If the module is installed into either the DEChub 900 or the DEChub 90:

Reseat the module.

(continued on next page)

DECrepeater 90FS Installation and Configuration 49

Problem Solving Using the LEDs (Cont.)

Table 3 (Cont.) Problem Solving Using the LEDs

Symptom Icon

Probable Cause Corrective Action

All LEDs are off.

The module does not have power.

Remove the module and inspect the module’s 48-pin connector for bent, broken, or dirty pins.

If any pins are broken or bent, replace the module.

If no pins are broken or bent, reinstall the module.

If the problem persists, replace module.

Power LED is off.

Faulty power LED. Replace the module.

Power LED is flashing.

Faulty power LED. Replace the module.

Faulty DEChub 900 or DEChub 90 slot connection.

Reinstall the module into another slot of the DEChub 900, or into the other slot (either 7 or 8) or the DEChub 90.

Power supply is faulty.

Replace the appropriate power supply.

Module OK LED is off.

Module does not have sufficient power.

Ensure Power LED is on.

Self-test is in progress.

Wait up to 1 minute for self-test to complete.

(continued on next page)

50 DECrepeater 90FS Installation and Configuration

Problem Solving Using the LEDs (Cont.)

Table 3 (Cont.) Problem Solving Using the LEDs

Symptom Icon

Probable Cause Corrective Action

Module OK LED is off.

Self-test failed. If the LED does not light after 1 minute,

reseat the module to repeat the self-test.

If the self-test fails again, replace the module.

Port Link LED is off.

Associated port connection is faulty.

Check that the fiber-optic cables and connections are properly installed.

Port 1 or 2 State LED is off.

Associated port is not properly connected to another operational network device.

Ensure that the port link LED is on. If not, properly connect the associated

port to network or station. Reseat the cable. If problem persists, replace the cable.

Associated port is auto-partitioned.

N/A.

Port 3 state LED is off.

AUI port has no connection or the connection is faulty.

If the module is installed into a DEChub 90, ensure that the module is installed into either slot 7 or 8.

Verify that the MAU (if one is installed) and connectors are installed correctly and operating properly.

Port state LED is flashing.

Associated port is disabled by network management.

Enable the associated port if necessary.

LKG-8866-93I

1 2 3 4 5

Ground CI+ DO+ Ground DI+

Ports

15-pin AUI

connector

Pin 6

7 8 9 10

Power rtn NC Ground CI– DO–

Ports

11 12 13 14 15

Ground DI– Power (12V) Ground NC

Ports

DECrepeater 90FS Installation and Configuration 51

Connector Pin Assignments

AUI (15-pin D-Sub) Connector

The following illustration shows a 15-pin AUI connector and its pin assignments:

Serial Port (8-pin MJ) Connector

The following illustration shows the front-panel serial port 8-pin MJ connector and its pin assignments:

8-pin MJ connector

GND RX GND CTS RTS TX DTR DSR

Assignment

1 2 3 4 5 6 7 8

Pin 1 8

LKG-9237-94I

LKG-5342-91I

9 D–Sub(F)

6 MMJ

3 4 5 6 7 8

1 2 3 4 5 6

1 2

RD DTR GND DSR RTS CTS

DCD SD

H8585-AC

Note: Not for connection to public networks in Sweeden, Germany, or Japan.

LKG–6975-92I

6 5 4 3 2 1

8 7

2 4 5 7 3

6 20

8 MJ DB25

TXD

CTS

TXD GND

RXD

RXD GND

DSR DTR

RTS

TXD

CTS TXD GND RXD

DSR DTR

RTS

52 DECrepeater 90FS Installation and Configuration

Connector Pin Assignments (Cont.)

H8571-J Adapter

The following illustration shows the H8571-J adapter (6-pin MMJ to 9-pin D-Sub connector) and its pin assignments:

H8575-A Adapter

The following illustration shows the H8575-A adapter (6-pin MMJ to 25-pin D-Sub connector) and its pin assignments:

H8585-AC

* Note: Not for connection to public networks in Sweden, Germany, or Japan.

LKG–6975-92I

6 5 4 3 2 1

8 7

2 4 5 7 3

6 20

8 MJ DB25

TXD

CTS

TXD GND

RXD

RXD GND

DSR

DTR

RTS

TXD

CTS TXD GND RXD

DSR DTR

RTS

H8584-AA

6 MJ

DSR RXD RXD GND TXD GND TXD DTR

6 5 4 3 2 1

8 7

TXD

CTS

TXD GND

RXD

TXD GND

DSR DTR

8 MP

LKG–6972-92I

DECrepeater 90FS Installation and Configuration 53

Connector Pin Assignments (Cont.)

H8585-AC Adapter

The following illustration shows the H8585-AC adapter (8-pin MJ to 25-pin connector) and its pin assignments:

H8584-AA Adapter

The following illustration shows the H8584-AA adapter (8-pin MP to 6-pin MJ connector) and its pin assignments:

H8585-AA

DB9

7 6 5 4 3 2

9 8

6 5 4 3 2 1

8 7

TXD

CTS

TXD GND

RXD

RXD GND

DSR DTR

8 MJ

RTS

DRDY

DTR TXD RXD DCD

CTS RTS

GND

LKG–6973-92I

54 DECrepeater 90FS Installation and Configuration

Connector Pin Assignments (Cont.)

H8585-AA Adapter

The following illustration shows the H8585-AA adapter (8-pin MJ to 9-pin DB connector) and its pin assignments:

DECrepeater 90FS Installation and Configuration

Redundant Fiber-Optic Link Configuration

This section describes the configuration and implementation of a redundant-link pair (RLP) of Ethernet 10BaseFL links.

NOTE: You must configure the fiber-optic ports using HUBwatch

before connecting the cables.

Redundant Fiber-Optic Link Overview

Redundant ports are usually configured between two or more repeaters to provide a standby link in case the active link fails. If the active link fails, the standby link is automatically activated to handle traffic between the repeaters.

The basic redundant configuration consists of a pair of master ports and two remote ports. The master ports control which of the two lines is active and which is standby , therefore, the master ports are referred to as a master pair.

The master ports can be connected to two remote ports on the same repeater or on different repeaters, but the remote ports must be on the same LAN (or extended LAN).

NOTE: This redundant configuration does not result in a repeater

loop, because only one of the links is active.

The remote ports can be one of two types: a responder port or a non-responder port. A responder port provides full fault detection because it signals the master if it detects a failure in its receive link. A non-responder port provides only partial fault detection because it does not signal the master if a failure occurs in its receive link.

NOTE: The DECrepeater 90FS and the DECrepeater 900FP are

the only DECrepeaters that can be configured as redundant port repeaters.

Redundant Fiber-Optic Link Components

The following components make up redundant fiber-optic link configurations:

DECrepeater 90FS Installation and Configuration

Redundant Fiber-Optic Link Configuration (Cont.)

• Redundant-Link Pair

The RLP is a pair of fiber-optic links that provides backup communication in the event of transmitter, receiver, or cable failures.

• Master

The master is the DECrepeater that contains the master control algorithm (MCA) for the ports in the RLP . This algorithm controls the Link Enable signal that goes to each of two ports in the RLP . The master uses this signal to enable the primary port until a failure is detected through the Link Status signal. When a failure is detected, the MCA disables the primary port and enables the secondary port.

• Responder Port

The RLP can contain two responder ports (referred to as responders) on the remote end of the links from the master ports. The responders are independent of each other, but reside on the same LAN (or extended LAN) as the master . A responder can signal the master when it detects a failure on its receive portion of the link. The responder does this by disabling the Link Idle signal on its transmit port until the receive portion of the link is operational again.

• Non-Responder Port

Any standard 10BaseFL device ports can be non-responder ports (referred to as non-responders). Unlike a responder, a non-responder cannot signal the master when there are receive link failures on its end of the link. If you define an RLP with non-responders, only partial fault detection is provided on the RLP.

• Primary Link

Defined at initialization time by the MCA, the primary link is initially the active link providing Ethernet communications. Activity defaults to the primary link after a reset condition.

• Secondary Link

The secondary link is the other link of the RLP to which the master fails over if there is a failure in the primary link.

DECrepeater 90FS Installation and Configuration

Redundant Fiber-Optic Link Configuration (Cont.)

• Active Link

The active link is the link that is currently enabled by the master to carry Ethernet traffic.

• Standby Link

The standby link is the link that is currently disabled by the master and does not carry Ethernet traffic. This port is held in readiness as a backup link in case the active link fails. On a functional link, the responder can still place traffic on the link, but there is no traffic from the master on that link.

• Master Control Algorithm

The Master Control Algorithm (MCA) enables only one link of the RLP at any time and controls the RLP as follows:

1. The MCA enables the primary link at initialization time (assuming that there are no failures on that link). This causes the primary link to become active.

2. The MCA monitors the primary link status for failures.

3. When the MCA detects a failure of the active link, the MCA: a. Disables the active link. b. Enables the standby link.

The active link always remains enabled (active) until a failure is detected on that link.

Redundant Fiber-Optic Link Operation

When you initially configure the DECrepeater 90FS for redundant operation, the primary port is the active port and the secondary port is the standby port. In operation, the active port communicates with its remote responder port until the master detects a link failure or until the port is internally partitioned. If the standby port is operational, the primary port is disabled, and the secondary port is enabled as the active port. The failover typically occurs within 4 to 8 ms (15 ms worst case).

Once the primary link is repaired, it becomes the standby link. If the repeater detects a failure in the (now active) secondary link, or if the port is internally partitioned, failover occurs back to the primary port.

DECrepeater 90FS Installation and Configuration

Redundant Fiber-Optic Link Configuration (Cont.)

A link failure can be caused by any of the following occurrences:

• Loss of carrier (light in a fiber-optic device)

• Auto-partitioning of the port

Simple Redundant Link Configuration

The DECrepeater firmware allows the configuration of a redundant fiber-optic Ethernet link from multiple ports. In its simplest form, a redundant link consists of a pair of master ports that reside on one module, each connected to independent ports on a remote module (see illustration). These remote ports may be responder ports or non-responder ports.

LKG-8834-94I

Port a

Tx Rx

Port m

Tx Rx

Port b

Tx Rx

Port n

Tx Rx

DECrepeater 900FP

Master port pair

DECrepeater 90FS

Single responder port

Simple Redundant Fiber-Optic Link

Configuration Example

Once these ports are properly configured using HUBwatch and connected together, one connection is the active link and the other is the standby link.

DECrepeater 90FS Installation and Configuration

Redundant Fiber-Optic Link Configuration (Cont.)

Complex Redundant Link Configuration

The DECrepeater 90FS also supports a more complex redundant link topology. In general, the redundant link consists of a pair of master ports on one module, each connected to enabled remote ports. The remote ports must reside on the same LAN (or extended LAN), but can be on separate modules as shown in the following illustration. The remote ports can be responders, non-responders, or a combination of the two. If your configuration includes a combination of a responder and a non–responder, configure the responder as the primary link, and the non-responder as the secondary link.

LKG-8835-94I

Port a

Tx Rx

Port b

Tx Rx

Port m

Tx Rx

Port n

Tx Rx

Master port pair

DECrepeater 90FS

Single responder port

Single non-responder port

DECrepeater 900FP

DECrepeater 90FA

Primary link

Secondary link

Another link between these ports

Complex Redundant Fiber-Optic Link

Configuration Example

DECrepeater 90FS Installation and Configuration

Redundant Fiber-Optic Link Configuration (Cont.)

Partial Fault Detection

Partial fault detection causes the active master port to fail over to the standby port if the active port detects any of the following circumstances:

• A link failure in in the receive portion of the active port

• An internally detected failure or partitioning of the active port

– An excessive number of collisions – An excessively long collision – Received jabbering – Internally detected MAU failure

When the DECrepeater 90FS fiber-optic ports are connected to a non-responder repeater, such as the DECrepeater 90FL, 90FA (as shown in the following illustration), or any IEEE 802.3 10BaseFL repeater port, partial fault detection is available.

Partial fault detection adequately detects most failure conditions, but cannot detect a failure in which the remote port cannot receive transmissions. That level of failure detection requires full fault detection.

LKG-9178–94I

Port a

Tx Rx

Port m

Tx Rx

Port b

Tx Rx

Port n

Tx Rx

DECrepeater 90FS DECrepeater 90FA/90FL

Master port pair

Partial Fault Detection Configuration Example

The master can detect a link failure here.

Secondary link (initially standby and disabled)

Primary link (initially active)

The master cannot detect a link failure here.

Single non-responder port

These ports may be on the same module or separate modules.

(always enabled)

DECrepeater 90FS Installation and Configuration

Redundant Fiber-Optic Link Configuration (Cont.)

Full Fault Detection

The DECrepeater 90FS supports full fault detection. This feature enables the master module to react to failures at either end of the receive or transmit media.

If a failure occurs in the responder’s receive port, the responder signals its partner master port. This allows the master to switch over to the standby port.

When the DECrepeater 90FS fiber-optic ports are connected to another redundant fiber-optic repeater, such as the DECrepeater 900FP (as shown in the following illustration) or another DECrepeater 90FS, full fault detection is available.

LKG-9179–94I

Port a

Tx Rx

Port m

Tx Rx

Port b

Tx Rx

Port n

Tx Rx

DECrepeater 90FS DECrepeater 900FP

Master port pair

Full Fault Detection Configuration Example

The master can detect a link failure here.

Secondary link (initially standby and disabled)

Primary link (initially active)

If there is a link failure here, the responder port signals its master so that the master can detect the failure.

Single responder port

These ports may be on the same module or separate modules.

(always enabled)

DECrepeater 90FS Installation and Configuration

Redundant Fiber-Optic Link Configuration (Cont.)

Table 4 shows the difference in failure detection between partial fault detection and full fault detection.

Table 4 Partial Fault Detection Versus Full Fault Detection

Link Failure from the Master Port’s Perspective

Partial Fault Full Fault

TX Link RX Link

Detection Detection

Failure Not detected Detected

Failure Detected Detected

Failure in

Both Detected Detected

Recommendations for Redundant-Link Configuration

Consider the following recommendations when configuring the DECrepeater 90FS for redundancy to increase fault detection and improve network reliability:

• Use responder ports (rather than non-responder ports) whenever possible.

• If you use a combination of responder ports and non-responder ports, assign

the responder as the primary link, and the non-responder as the secondary link.

• Assign the remote ports to separate modules. This ensures that one of the two

remote ports is functional in the event of a remote module failure.

• Whenever possible, configure primary and secondary link cables into separate

pathways, to avoid a single point of failure.

DECrepeater 90FS Installation and Configuration 63

Fiber-Optic Loss Budget

This section describes the calculated fiber-optic loss budget for the DECrepeater 90FS.

Note the labeling on the fiber-optic cable that is being installed with the DECrepeater 90FS. Cables are tagged according to fiber type (for example, 50/125-,

62.5/125-, 85/125-, or 100/140-micron fiber) and the attenuation of each cable is also characterized and recorded.

10BaseFL Loss Budget

Table 5 shows the calculated loss budget for 10BaseFL fiber-optic segments used to interconnect the DECrepeater 90FS with the cable plant. These measurements account for the connectors at either end of the segment and are calculated using the transmit and receive optical power levels in decibels of optical power referenced to one milliwatt (dBm).

NOTE: When connecting the cables to other devices, take into

account the transmit and receive optical power levels of the other devices.

Table 5 10BaseFL Worst-Case Loss Budget (0oC to 50oC, End of Life1)

Unit of

Multimode, Graded Index Fiber Size (Microns)

Measurement Measure 50/125 62.5/125 85/125 100/140

Numerical aperture

NA 0.2 0.275 0.26 0.3

Minimum average transmit power (P

T(avg)

)

dBm –22.8 –19.0 –16.8 –13.5

Minimum average receive sensitivity (P

R(avg)

)

dBm –32.5 –32.5 –32.5 –32.5

10BaseFL loss budget (P

T(avg)

– P

R(avg)

)

dB 9.7 13.5 15.7 19.0

No additional degradation is used. It is included in the vendor’s specified power

calculations.

NOTE: To ensure accurate measurements, do not measure

optical power levels from cables connected to ports that are operating as responders in a redundant-link configuration. (Refer to the section titled Redundant Fiber-Optic Link Configuration.)

64 DECrepeater 90FS Installation and Configuration

Fiber-Optic Loss Budget (Cont.)

FOIRL Compatibility

The IEEE 802.3 standard for fiber-optic interrepeater link (FOIRL) devices specifies peak power levels.

The standard specifies a –27.0 dBm minimum peak receive power (P

R(avg)

= –30.0 dBm). This power level represents a 2.5 dB lower receive sensitivity . The worst-case loss budget for FOIRL-compliant devices should include this decrease in receive sensitivity.

Table 6 shows the calculated loss budget, in peak levels, for FOIRL-compliant fiber-optic segments.

Table 6 FOIRL Worst-Case Loss Budget (0oC to 50oC, End of Life1)

Unit of

Multimode, Graded Index Fiber Size

(Microns)

Measurement Measure 50/125 62.5/125 85/125 100/140

Minimum peak transmit power (P

T(peak)

)

dBm –19.8 –16.0 –13.8 –10.5

Minimum peak receive power (P

R(peak)

)

dBm –27.0 –27.0 –27.0 –27.0

FOIRL loss budget

dB 7.2 11.0 13.2 16.5

No additional degradation is used. It is included in the vendor’s specified power

calculations.

The IEEE 802.3 standard specifies a maximum receive power level of –9.0 dBm peak or –12.0 dBm average for FOIRL and 10BaseFL devices, respectively.

When calculating the loss budget for fiber-optic devices, ensure that the higher output from the DECrepeater 90FS, in conjunction with the increased launch power into the two largest fiber sizes (85/125 and 100/140 microns), does not overload the receivers.

DECrepeater 90FS Installation and Configuration 65

Fiber-Optic Loss Budget (Cont.)

The loss budget for fiber-optic devices should include the maximum launch power amounts as shown in Table 7.

Table 7 DECrepeater 90FS Best-Case Maximum Launch Power

Unit of

Multimode, Graded Index Fiber Size

(Microns)

Measurement Measure 50/125 62.5/125 85/125 100/140

Maximum peak transmit power

dBm –12.8 –9.0 –6.8 –3.5

Maximum average transmit power

dBm –15.8 –12.0 –9.8 –6.5

When the DECrepeater 90FS is connected to short lengths of 85/125-micron or 100/140-micron fiber-optic cable, the connection might require additional attenuation to prevent exceeding the –9.0 dBm peak (–12 dBm average) received power level. To make that determination, do the following:

1. Subtract the cable’s characterized attenuation value from the value listed in Table 7.

2. If the result of this calculation is less negative than –9.0 dBm peak (–12.0 dBm average), connect the fiber-optic cable to the DECrepeater 90FS and measure the actual power level at the opposite end of the cable to determine whether additional attenuation is required.

If required, attenuators (such as Fotec part number A-450-A) can be obtained from Fotec, Inc. in Charlestown, Massachusetts, or contact other fiber-optic vendors for an equivalent part.

66 DECrepeater 90FS Installation and Configuration

Product Specifications

Table 8 provides operating specifications for the DECrepeater 90FS module. Note the additional parameters (listed in the tables) to consider when the module is installed as a standalone unit.

Table 8 Operating Specifications

Parameter

Specification

Operating Environment

Operating Temperature

5° C to 50° C (41° F to 122° F) Relative Humidity 10% to 95% noncondensing Altitude Sea level to 4900 m (16,000 ft) Power 15.0 W, total power

1.5 A, 5Vdc,

0.5 A, 12Vdc

0.0 A, 15Vdc

Connectors

2 fiber-optic, 1 AUI, 1 MJ-8

Physical

Height 29.2 cm (11.5 in) Width 3.2 cm (1.25 in) Depth 11.2 cm (4.4 in); 13.5 cm (5.3 in) when

installed as a standalone unit. Weight 0.82 kg (1.5lb); 1.09 kg (2.0 lb) when

installed as a standalone unit.

Certification

CE, CSA, FCC,TÜV, UL, VCCI

For sites above 4900 m (16,000 ft), decrease the operating temperature specification

by 1.8° C for each 1000 m or 3.2°F for each 3200 ft.

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.

DECrepeater 90FS Installation and Configuration

Product Specifications (Cont.)

Table 9 provides acoustic specifications for the module.

Table 9 Acoustical Specifications

Acoustics — Declared values per ISO 9296 and ISO 7779

Product

Sound Power Level L

WAd

, B

Sound Pressure Level L

pAm

, dBA

(bystander positions)

Idle/Operate Idle/Operate

DEFMI 4.5 31 DEFMI + H7827–BA 4.5 32

Schallemissionswerte — Werteangaben nach ISO 9296 und ISO 7779/DIN EN27779

Produkt

Schalleistungspegel L

WAd

, B

Schalldruckpegel L

pAm

, dBA

(Zuschauerpositionen)

Leerlauf/Betrieb Leerlauf/Betrieb

DEFMI 4,5 31 DEFMI + H7827–BA

4,5 32

Current values for specific configurations are available from Digital Equipment Corporation

representatives. 1 B = 10 dBA.

Aktuelle Werte für spezielle Ausrüstungsstufen sind über die Digital Equipment

Vertretungen erhältlich. 1 B = 10 dBA.

68 DECrepeater 900FP Installation and Configuration

Associated Documents

The following documents provide related information about the module. Ordering information is provided at the back of this manual.

Title and Order Number

Description

DEChub 900 MultiSwitch Owner’s Manual

EK–DH2MS–OM

Provides installation, use, security, and troubleshooting information for the DEChub 900 MultiSwitch.

HUBwatch Installation and Configuration

AA–QOFXB–TE

Provides information for installing and configuring HUBwatch for Open VMS V3.0 and HUBwatch for Windows V2.0.

HUBwatch for Windows Use

AA–Q3S3A–TE

Provides network management and DEChub 900 functionality information for HUBwatch for Windows V2.0.

DEChub 90 Owner’s Manual

EK-DEHUB-OM

Provides installation, use, security, and troubleshooting information.

Using DECndu Plus (MS–DOS)

AA–PYVVA–TE

Provides instructions to upgrade the firmware in an MS–DOS environment of selected network devices using Digital’s Network Device Upgrade (DECndu) Plus utility.

Using DECndu Plus (UL TRIX RISC)

AA–PYVTA–TE

Provides instructions to upgrade the firmware in an ULTRIX RISC environment of selected network devices using Digital’s Network Device Upgrade (DECndu) Plus utility.

Using DECndu Plus (OpenVMS VAX)

AA–PYVRA–TE

Provides instructions to upgrade the firmware in an OpenVMS VAX environment of selected network devices using Digital’s Network Device Upgrade (DECndu) Plus utility.

Open DECconnect Applications Guide

EC–G2570–42

Provides information to help plan and install networking systems based on Digital’s OPEN DECconnect System and networking products.

HOW TO ORDER ADDITIONAL DOCUMENTATION

DIRECT TELEPHONE ORDERS

In Continental USA call 1-800-DIGITAL (1-800–344-4825)

In New Hampshire, Alaska or Hawaii call 1–603–884–6660

In Canada call 1–800–267–6215

DIRECT MAIL ORDERS (U.S. and Puerto Rico*)

DIGITAL EQUIPMENT CORPORATION

P.O. Box CS2008

Nashua, New Hampshire 03061

DIRECT MAIL ORDERS (Canada)

DIGITAL EQUIPMENT OF CANADA LTD.

940 Belfast Road

Ottawa, Ontario, Canada K1G 4C2

Attn: A&SG Business Manager

INTERNATIONAL

DIGITAL EQUIPMENT CORPORATION

A&SG Business Manager

c/o Digital’s local subsidiary

or approved distributor

Internal orders should be placed through U.S. Software Supply Business (SSB),

Digital Equipment Corporation, 10 Cotton Rd. Nashua, NH. 03063-1260

*Any prepaid order from Puerto Rico must be placed

with the Local Digital Subsidiary:

809–754–7575

ELECTRONIC ORDERS (U.S. ONLY)

Dial 1-800-dec-demo with any VT100 or VT200 compatible terminal and a 1200 baud modem.

If you need assistance, call 1-800-DIGITAL (1-800-344-4825)

DECrepeater 90FS Installation and Configuration

EK-DEFMI-IN. A01

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Digital Equipment DECrepeater 90FS Installation And Configuration Manual

Specifications and Main Features

Frequently Asked Questions

User Manual