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Digital Equipment DECrepeater 90FA Owner's Manual

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DECrepeater 90FA
Owner's Manual
Order Number: EK–DEFAR–OM. B01
Revision/Update Information:
This is a revised manual.
Digital Equipment Corporation
Maynard, Massachusetts

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  • Page 1 DECrepeater 90FA Owner’s Manual Order Number: EK–DEFAR–OM. B01 Revision/Update Information: This is a revised manual. Digital Equipment Corporation Maynard, Massachusetts...
  • Page 2 Digital or an authorized sublicensor. Digital Equipment Corporation makes no representations that the use of its products in the manner described in this publication will not infringe on existing or future patent rights, nor do the descriptions contained in this publication imply the granting of licenses to make, use, or sell equipment or software in accordance with the description.

  • Page 3: Table Of Contents

    Standalone Installation ....... . . 3–1 Mount the DECrepeater 90FA on a Wall ....3–2 Standalone Installation Connections .
  • Page 4 DECrepeater 90FA Standalone Troubleshooting ....5–3 DECrepeater 90FA Backplane Troubleshooting ....5–8 A Specifications and Parts List AUI Connector Pin Assignments .
  • Page 5 Power Specifications ......A–3 DECrepeater 90FA Input ..... . . A–5 A–3...

  • Page 7: About This Manual

    The DECrepeater 90FA is a three-port repeater designed to function as a standalone unit or as a managed unit in a DEChub 90 backplane. In this manual, the DECrepeater 90FA unit may be referred to as the DECrepeater 90FA or the repeater.
  • Page 8 Conventions The following conventions are used in this manual: Convention Meaning Note Provides general information. A number in a black circle in text refers to the corresponding number in an accompanying figure. In command descriptions, brackets indicate optional elements. variables In command descriptions, italic type indicates a variable that you supply.

  • Page 9: Overview

    This chapter describes the DECrepeater 90FA repeater and briefly summarizes the features of this repeater. The DECrepeater 90FA is a three-port repeater designed for IEEE 802.3 standard CSMA/CD networks. The DECrepeater 90FA has one ThinWire port, one fiber-optic port, and one 15-pin AUI port. The ThinWire port complies with the IEEE 802.3 standard for 10Base2 networks;...

  • Page 10: Leds And Connectors

    LEDs and Connectors The front panel of the DECrepeater 90FA contains several indicator lights (LEDs) and connectors. These LEDs and connectors are described in Table 1–1 and are shown in Figure 1–1. Figure 1–1 DECrepeater 90FA LEDs and Connectors PJ -D12 0 REDUCE .4 5...

  • Page 11: Decrepeater 90Fa Leds And Connectors

    Port 2 Backbone Port AUI connector provides AUI connection to the backbone port of the DECrepeater 90FA. Power connector receives +5.0 V and +12.0 V from the DECrepeater 90FA power supply. Not used when the repeater is installed in the DEChub 90 backplane.

  • Page 13: Configuring The Decrepeater 90Fa

    Configuring the DECrepeater 90FA This chapter contains some of the basic configuration rules and guidelines that must be followed to correctly install the typical DECrepeater 90FA configurations. For more detailed information about installing IEEE 802.3 compliant multisegment LANs, refer to Section 13 of the IEEE 802.3i-1990 standard.

  • Page 14: Network Constraints

    (coaxial) segments. 2. The total of all segments (up to five) shall not exceed 2500 meters. Figure 2–1 shows an example of the maximum number of repeaters on a path using coaxial segments and 10Base-FL segments. 2–2 Configuring the DECrepeater 90FA...

  • Page 15: Decrepeater 90Fa Repeater Path

    Figure 2–1 DECrepeater 90FA Repeater Path DECrepeater 90FL Fiber-Optic Link Fiber-Optic Link Segment 500 m Segment 500 m DECrepeater 90FA Coax DECrepeater 90FA 10Base5 DECrepeater 90FA Segment 500 m 10Base-FL 10Base2 Link Segment Segment 100 m 185 m LJ-02372-TI0 Configuring the DECrepeater 90FA 2–3...

  • Page 16: Decrepeater 90Fa Typical Dechub 90 Configuration

    Figure 2–2 shows a DEChub 90 extended LAN configuration. Figure 2–2 DECrepeater 90FA Typical DEChub 90 Configuration DECh u b 90 DEC repeater 90FL P o w e r S u p p l y F i be r-O pt ic L in k Se gm en t...

  • Page 17: Installed Fiber Constraints

    The maximum link distance could be further restricted by the number of splices, interconnects, and cross-connect administration points. Refer to the DECconnect System Fiber Optic Planning and Configuration guide for instructions on how to calculate the link certification value for each segment. Configuring the DECrepeater 90FA 2–5...

  • Page 19: Installation

    Appendix A, Specifications and Parts List. The DECrepeater 90FA may be installed on a desk top or table, mounted on a wall by its back cover, or installed in a DEChub 90 backplane. The only tool required for installation is a screwdriver.

  • Page 20: Mount The Decrepeater 90Fa On A Wall

    Mount the DECrepeater 90FA on a Wall To install the DECrepeater 90FA as a standalone wall-mount unit, perform the following procedure: 1. Remove the cover (if necessary). a. Insert a small screwdriver into the top mounting hole on the cover (Figure 3–1).

  • Page 21: Mounting Screws

    2. Use the mounting holes on the back cover to determine the placement for the mounting screws on the wall (Figure 3–2). 3. Secure the back cover to the wall using the mounting screws. Figure 3–2 Mounting Screws L J - 0 0 7 0 1 - T I 0 Installation 3–3...

  • Page 22: Standalone Installation Connections

    Figure 3–3: 1. Connect the cable from the power supply to the 7-pin power connector on the DECrepeater 90FA. Align the power symbol on the dc power connector with the power symbol on the DECrepeater 90FA and push straight in.

  • Page 23: Standalone Installation

    Figure 3–3 Standalone Installation 5 0 - O h m Te r mi n a to r T- C o n n e c t o r Fiber Link To Fiber Network L J - 0 2 3 7 4 - T I 0 A Installation 3–5...

  • Page 24: Backplane Installation

    Lift the internal latch with the screwdriver and pull the cover away and down from the top of the unit (Figure 3–1). 2. Install the DECrepeater 90FA into slot 7 or 8 of the backplane. Place the lower mounting tab, located on the back of the repeater, into slot 7 or 8 of the backplane (Figure 3–4).

  • Page 25: Installing The Decrepeater 90Fa Into The Dechub

    Figure 3–4 Installing the DECrepeater 90FA into the DEChub 90 L J - 0 2 3 7 5 - T I 0 Installation 3–7...

  • Page 27: Managing The Decrepeater 90Fa

    VMS or ULTRIX operating systems. This chapter also describes the management functions, commands, techniques, and messages. The DECrepeater 90FA is managed online using a DECbridge 90 series unit in a DEChub 90 backplane. All commands that affect the DECrepeater 90FA are part of the DECbridge 90 series command set.

  • Page 28: Accessing Mop From Vms Systems

    BI-based systems (VAX 6300 and VAX 6400 computers) bna-0 VAX 4000 computer series isa-0 MicroVAX systems and VAX 3600 and VAX 3900 qna-0 computers VAXstation 2000 and VAXstation 3000 computer series sva-0 VAX–11/780 and VAX–11/785 computers (UNIBUS) una-0 4–2 Managing the DECrepeater 90FA...

  • Page 29: Accessing A Bridge Repeatedly

    You must have superuser privileges to invoke console carrier. Once the MOP option is installed, each bridge to be managed must be given a name and a dummy node number using the addnode utility. For example: # addnode 13.1 DBRG1 Managing the DECrepeater 90FA 4–3...

  • Page 30: Console Carrier User Interface

    The system accepts unique command abbreviations. Table 4–2 summarizes the DECbridge commands that apply to the DECrepeater 90FA. For a complete list of commands, refer to the DECbridge 90 Owner’s Manual or the DECbridge 90FL Owner’s Manual. 4–4 Managing the DECrepeater 90FA...

  • Page 31: Summary Of Decbridge 90Fa Commands

    DEFINE commands do not change the currently active values. The SET commands change only the currently active values, but do not affect the defaults that are assumed on power-up or reset. (continued on next page) Managing the DECrepeater 90FA 4–5...

  • Page 32: Description Of Command Parameters

    A slot number is a single number ranging from 1 to 8 that identifies a hub slot containing a DECrepeater 90FA. When two DEChub units are connected together, the hub number (1 or 2) is specified before the slot number. For example, the hub slot number 2,4 refers to the fourth slot from the left in the second DEChub, which is the hub that does not contain the DECbridge 90.

  • Page 33: Description Of Commands

    Description of Commands This section describes the commands used by the DECrepeater 90FA. The examples used to explain the commands are based on the configuration shown in Figure 4–1, Sample Configuration. DEFINE BRIDGE HUB_MANAGEMENT DISABLE SET BRIDGE HUB_MANAGEMENT DISABLE Disables all repeater management through the DECbridge 90 unit for DECrepeater 90FA units in the DEChub 90 backplane.
  • Page 34 SET PORT [hub number,] slot number, port number ENABLE Reverses the effect of SET PORT DISABLE for DECrepeater 90 ports. Example 2: The expected response to a SET PORT ENABLE command for a DECrepeater 90FA appears as follows: DECbridge>SET PORT 1,3,1 ENABLE Hub 1 slot 3 port 1 segment counter 0 status: no carrier loopback SET REPEATER [hub number,]slot number RESET.
  • Page 35 DECbridge>SHOW ADDRESS 3 Address 3: unused Example 3: The expected response of a SHOW ADDRESS command to a valid address appears as follows: DECbridge>SHOW ADDRESS 2 Address 2: 08-00-2B-10-20-30 hub 2 slot 8 port 4 Managing the DECrepeater 90FA 4–9...
  • Page 36 Shows the type of repeater and the port status for each port on that repeater. The hub number can be 1 or 2, and slot numbers can be 1 to 8. If you do not include parameters, information is shown for all repeaters in both hubs. 4–10 Managing the DECrepeater 90FA...
  • Page 37 Hub 1 slot 3 port 6 segment counter 1 status: no carrier loopback Hub 1 slot 3 port 7 segment counter 1 status: no carrier loopback Hub 1 slot 3 port 8 segment counter 1 status: no carrier loopback Managing the DECrepeater 90FA 4–11...
  • Page 38 DECbridge 90 is still in the power-up stage appears as follows: DECbridge>SHOW REPEATER The DECbridge 90 is not the designated hub manager. There is a 60-second delay after power-up before the DECbridge takes control of the hub. 4–12 Managing the DECrepeater 90FA...

  • Page 39: Typical Management Techniques

    L J - 0 2 1 5 3 - T I 0 Typical Management Techniques The DECrepeater 90FA can be managed as a standalone unit using LEDs, or online within a group of repeaters installed in a DEChub 90. The DECrepeater 90FA comes with LEDs that indicate system status in a standalone Managing the DECrepeater 90FA 4–13...

  • Page 40: Remote Network Management With The Decbridge 90

    LEDs as well as online management. Remote Network Management with the DECbridge 90 You can manage a DECrepeater 90FA with a DECbridge 90 work group bridge and a DEChub 90 backplane. The DECbridge 90 unit communicates across the DEChub 90 backplane to any repeaters in the DEChub. You can also connect two DEChub 90 backplanes together and manage the repeaters in both DEChub 90 backplanes using one DECbridge 90 unit.

  • Page 41: Management Session

    In this example, there is a ThinWire repeater (DECrepeater 90C) in the same hub (hub 1) as the bridge (if this is a 2-hub configuration). The repeater is in slot 5 with 6 ThinWire ports. Managing the DECrepeater 90FA 4–15...

  • Page 42: If Problems Are Reported

    (no link beat). No carrier loopback Cable fault, usually a shorted cable. Transmit carrier drop out Cable fault, usually a shorted cable. Jabber Stations connected to this port continue to transmit; expect a faulty station. 4–16 Managing the DECrepeater 90FA...

  • Page 43: To Disable A Port

    To Reset the Repeater The following command resets the repeater to power-up condition. This includes restoring any ports that have been partitioned by the manager as well as resetting the segmentation counters. DECbridge>SET REPEATER 5 RESET Managing the DECrepeater 90FA 4–17...

  • Page 44: Error Messages

    Use the SHOW REPEATER command to determine the number of ports for the device and to specify a port number within that range. (continued on next page) 4–18 Managing the DECrepeater 90FA...
  • Page 45 10 minutes. 1805:00-00-00-00 A loopback diagnostic has run and failed on the backbone port. The diagnostic is tried every 5 seconds until the test passes. (continued on next page) Managing the DECrepeater 90FA 4–19...

  • Page 46: Standalone Configuration Management

    Table 1–1, for a description of each LED and its function. Note After you power up a standalone DECrepeater 90FA, all LEDs, except the network activity LED, stay on if there are no active connections, or if there is no hardware or network activity. After an active station is connected to one of the ports, the LED for the active port stays on and all other ports turn off.

  • Page 47: Troubleshooting

    2. Note the fault condition. 3. Isolate the problem. Port Partitioning Any messages or data packets received from any port by the DECrepeater 90FA are transmitted to all ports. The port status LEDs display the following port partition status: The port is not partitioned.

  • Page 48: Decrepeater 90Fa Status Indicators

    Table 5–1 DECrepeater 90FA Status Indicators Fault Non-Fault Ports 0 through – Partitioned by management. 2 flashing Port 0 off Open cables Port not connected. Shorted cables Cables not properly connected Port 1 off Link problem (see Table 5–2) Link not connected.

  • Page 49: Decrepeater 90Fa Standalone Troubleshooting

    DECrepeater 90FA Standalone Troubleshooting To troubleshoot a DECrepeater 90FA standalone installation, refer to Table 5–3 for a list of possible error conditions and the corrective action. Table 5–3 Troubleshooting a DECrepeater 90FA Standalone Unit If... Then... Do this... All LEDs are off.
  • Page 50 Table 5–3 (Cont.) Troubleshooting a DECrepeater 90FA Standalone Unit If... Then... Do this... If the port 0 status LED does not Replace the repeater. light and/or remain on If the port 0 status LED does Terminate port 0 with a T-...
  • Page 51 Table 5–3 (Cont.) Troubleshooting a DECrepeater 90FA Standalone Unit If... Then... Do this... If the fiber-link LED is on Remove all network connections from the repeater. Turn the repeater off and on. Check that all the port status LEDs come on. There will be no activity;...
  • Page 52 Table 5–3 (Cont.) Troubleshooting a DECrepeater 90FA Standalone Unit If... Then... Do this... If the fiber-link LED of the Check the cable to the receiving port lights, the idle external device, and check signal is present. the external device for correct operation.
  • Page 53 Table 5–3 (Cont.) Troubleshooting a DECrepeater 90FA Standalone Unit If... Then... Do this... If the AUI connection is secure Check that the MAU is being powered by the repeater. (Most MAUs have a Power OK LED.) If the MAU is not powered by Replace the repeater.

  • Page 54: Decrepeater 90Fa Backplane Troubleshooting

    DECrepeater 90FA Backplane Troubleshooting To troubleshoot a DECrepeater 90FA installed in a DEChub 90 configuration, refer to Table 5–4 for a list of possible error conditions and the corrective action. Table 5–4 Troubleshooting a DECrepeater 90FA in a DEChub 90 Backplane If...
  • Page 55 Table 5–4 (Cont.) Troubleshooting a DECrepeater 90FA in a DEChub 90 Backplane If... Then... Do this... If the repeater does not turn Replace the repeater. on in either slot 7 or 8, check those slots with another known good module. If the known good...
  • Page 56 Table 5–4 (Cont.) Troubleshooting a DECrepeater 90FA in a DEChub 90 Backplane If... Then... Do this... If any other units in the DEChub Replace the repeater. 90 indicate network activity, the repeater activity LED should be on. If the port 0 status LED is on and the activity LED is off, port 0 is not receiving traffic.
  • Page 57 Table 5–4 (Cont.) Troubleshooting a DECrepeater 90FA in a DEChub 90 Backplane If... Then... Do this... If all port status LEDs do light Reconnect each fiber port momentarily, the ports should be receive channel. Note reconnected one at a time.
  • Page 58 Table 5–4 (Cont.) Troubleshooting a DECrepeater 90FA in a DEChub 90 Backplane If... Then... Do this... If the fiber-link and status LEDs Connect the transmit both come on channel of the port to the external equipment. If the port status LED fails to...
  • Page 59 Table 5–4 (Cont.) Troubleshooting a DECrepeater 90FA in a DEChub 90 Backplane If... Then... Do this... If port 2 status LED does not Replace the repeater. light, at least momentarily If port 2 status LED does light, Restore all port connec- even if only momentarily tions on the repeater.

  • Page 61: A Specifications And Parts List

    Specifications and Parts List This appendix provides the specifications and parts list for the DECrepeater 90FA repeater. Specifications for the DECrepeater 90FA are divided into the following categories: • Physical dimensions • Environmental (operating and shipping) specifications • Power specifications Table A–1 lists the physical dimensions of the DECrepeater 90FA.

  • Page 62: Operating Environment

    Convectively cooled. A minimum of 10 cm (4 in) of space must be provided on both ends of the unit for adequate air flow. The DECrepeater 90FA is designed to operate in an office environment or equipment room environment such as telephone closets or satellite equipment rooms.

  • Page 63: Decrepeater 90Fa Input

    Table A–4 lists the power specifications for the DECrepeater 90FA. Table A–4 Power Specifications Specification Value Voltage (domestic) 104 Vac to 128 Vac (nominal 120 Vac) Voltage (international) 208 Vac to 256 Vac (nominal 240 Vac) AC cord length 6 ft Current at 120 V .25 A...

  • Page 64: Aui Connector Pin Assignments

    AUI Connector Pin Assignments The following table shows the assignment of circuits to connector pins in accordance with the IEEE 802.3 standard. Circuit DO-A Data Out circuit A DO-B Data Out circuit B DO-S Data Out circuit Shield DI-A Data In circuit A DI-B Data In circuit B DI-S...

  • Page 65: Parts List

    Parts List Table A–6 lists the replacement parts for a DECrepeater 90FA. Table A–6 Parts List Replacement Part Part Number DECrepeater 90FA DEFAR-MA Fiber-optic cables BN24E series Power supply (120/240 Vac) H7827-AA Specifications and Parts List A–5...

  • Page 67: B Management Details

    This delay ensures that there is no other manager unit in use in the hub. During the 60 seconds, you cannot remotely manage the DECrepeater 90FA. This restriction does not apply to the repeaters themselves. A repeater inserted into the hub is immediately manageable by whatever unit is currently the designated hub manager.

  • Page 68: Annotating The Bridge Address Table

    If you do not want a specific DECbridge 90 series unit to be the designated hub manager, use the DEFINE BRIDGE HUB_MANAGEMENT DISABLE command to disable the hub management features. You can use the SHOW REPEATER and SET or SHOW PORT commands without restriction once the DECbridge unit is the designated hub manager.

  • Page 69: Using The Wgb Address Table For Work Group Management

    As a worst case example, if it takes 60 seconds for each of the recommended 200 stations to transmit a message, it could take 200 minutes to complete the address database annotations. However, the DECbridge 90 unit tries to expedite the transmission as follows: •...

  • Page 71: C Related Documentation

    Guide Ordering Information Customers may order documents by phone or mail. Continental USA and Puerto Rico Call 1-800-258-1710 or send mail to: Digital Equipment Corporation Peripherals and Supplies Group P.O. Box CS2008 Nashua, NH 03061 New Hampshire, Alaska, and Hawaii Call 1-603-884-6660.

  • Page 72: Digital Personnel

    Digital Personnel Digital personnel may order these documents from: Digital Equipment Corporation 444 Whitney Street Northboro, MA 01532 Attn: Publishing and Circulation Services (NR03/W3) Order Processing Section C–2 Related Documentation...
  • Page 73 4–4 to 4–6 DC OK indicator, 1–3 parameter descriptions, 4–6 DEChub 90 backplane Configuration rules See backplane. DECrepeater 90FA, 2–1 to 2–5 DECrepeater 90FA extended LAN, 2–4 backplane troubleshooting, 5–8 to network, 2–2 5–13 number of repeaters, 2–1 configuration rules, 2–1...
  • Page 74 DECrepeater 90FA (cont’d) Indicators (cont’d) port 1 status, 1–3 features, 1–1 Installation managed in backplane, 1–1 backplane, 3–6 to 3–7 operating environment, A–2 environmental requirements, 3–1 physical dimensions, A–1 standalone, 3–1 power specifications, A–3 tool, 3–1 replacement parts, A–5 wall-mount, 3–2 to 3–5 shipping environment, A–2...
  • Page 75 Standalone installation, 3–1 to 3–5 security, 4–3 Port AUI, 1–1 fiber-optic, 1–1 Troubleshooting number, 4–6 DECrepeater 90FA in DEChub 90 ThinWire, 1–1 backplane, 5–8 to 5–13 Port 0 network (BNC) connector, 1–3 DECrepeater 90FA standalone, 5–3 to Port 0 status indicator, 1–3 5–7 Port 1 status indicator, 1–3...

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