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Digital Equipment DECrepeater 90C Owner's Manual

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DECrepeater 90C Owner's Manual
Order Number EK–DECMR–OM.002
Digital Equipment Corporation

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  • Page 1 DECrepeater 90C Owner’s Manual Order Number EK–DECMR–OM.002 Digital Equipment Corporation...
  • Page 2 Second Edition, September 1991 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.

  • Page 3: Table Of Contents

    Contents About This Manual Overview Features ..........1–1 Installation .
  • Page 4 Power Supply ........A–3 DECrepeater 90C Input ....... . A–3 Parts List .
  • Page 5 Typical Standalone Topology Map ..... 4–18 Tables 1–1 DECrepeater 90C LEDs ......1–4 2–1 DECrepeater 90C Partitioning .

  • Page 6: About This Manual

    DEChub 90 backplane. Organization This manual contains five chapters, and three appendixes. • Chapter 1 provides an overview of the DECrepeater 90C and introduces you to the product’s features. • Chapter 2 describes the configuration rules and operating conditions for the ThinWire multiport repeater in a ThinWire Ethernet system or standard Ethernet network.
  • Page 7 viii About This Manual Conventions This manual uses the following conventions: Convention Meaning NOTE Provides general information on the current topic. A number in a black circle in text refers to the corresponding number in an accompanying illustration. In command descriptions, brackets indicate optional elements.

  • Page 8: Overview

    DECrepeater 90C in an Ethernet local area network (LAN). If you use the DECrepeater 90C as a standalone unit, it operates as a 7- port unmanaged repeater and uses a separate power supply. The modular power supply connects to a 7-pin connector on the repeater and comes in two versions, for use with 120 Volt or 240 Volt power outlets.

  • Page 9: Sample Decrepeater 90C Connection

    1–2 Overview Workstation Workstation DECserver DECrepeater 90T DECrepeater 90C DECserver 90L Work Group ThinWire Segment DECbridge 90 Work Group Bridge Ethernet Backbone Computer 1 Computer 2 Server LJ-00955-TI0 Figure 1–1 Sample DECrepeater 90C Connection...

  • Page 10: Installation

    Overview 1–3 Installation The DECrepeater 90C is easy to install and use. It does not require any programming or other assistance from the system management. After unpacking the repeater: 1. Plug the connector from the power supply into your DECrepeater 90C, then plug the power supply into a working ac power outlet.

  • Page 11: Leds And Connectors

    1–4 Overview LEDs and Connectors The next table describes the DECrepeater 90C LEDs and connectors, shown in the illustration following the table. Table 1–1 DECrepeater 90C LEDs Power indicator—Monitors the status of the +5.0 Vdc voltage. On: The +5.0 Vdc voltage is normal.
  • Page 12 Overview 1–5 L J - 0 0 5 4 4 - T I 0...

  • Page 13: Configuration

    Digital repeaters comply with Ethernet and IEEE 802.3 standards. These standards are subject to revision, therefore, network planners may need to consult the standards frequently for detailed information. This chapter contains sufficient information, however, to use the DECrepeater 90C in a typical network configuration. 2–1...

  • Page 14: Port Partitioning

    (MAUs). When not used as a point-to-point link, a ThinWire segment may contain 30 transceivers. NOTE The DECrepeater 90C port has an integral transceiver. A ThinWire segment can be a maximum of 185 meters long. Port Partitioning Any messages or data packets received from any port backbone by the repeater are transmitted to all ports.

  • Page 15: Installation

    The location should have access to a power outlet that supplies the correct voltage. Place the repeater on a table. When you pale the DECrepeater 90C on a table top, your only requirement is to follow the environmental specifications found in Appendix A.

  • Page 16: Mount The Repeater On A Wall

    3–2 Installation Mount the repeater on a wall. 1. Remove the back cover of the repeater (if necessary). a. Insert a small screwdriver into the top mounting hole on the cover. b. Lift the internal latch with the screwdriver, then pull the cover away and down from the top of the repeater.
  • Page 17 Installation 3–3 L J - 0 0 7 0 1 - T I 0 5. Attach the back cover to the repeater. 6. Mount the repeater onto the mounting screws.

  • Page 18: Connect The Cables

    Refer to the following figure to perform these steps. 1. Connect the cable from the power supply to the 7-pin power connector on the DECrepeater 90C. Align the power symbol on the dc power connector with the power symbol on the DECrepeater 90C and push straight in.
  • Page 19 Installation 3–5 2. Verify the operation of each device by sending information to the port being tested. The DECrepeater 90C is now installed. 50- O hm T ermi nat or T -Co nne ct o r T - Conn ect or...

  • Page 20: Backplane Installation

    3–6 Installation Backplane Installation To install the repeater in the DEChub 90 Ethernet backplane, perform the following procedures: Remove the back cover. Remove the back cover if one is present. 1. Insert a small screwdriver into the top mounting hole on the cover. 2.

  • Page 21: Mount The Repeater In The Backplane

    Mount the repeater in the backplane. 1. Install the repeater in the backplane as shown in the following figure. Place the lower mounting tab, on the back of the DECrepeater 90C, in the correct mounting slot on the backplane. 2. Rock the repeater into place. You hear an audible click when the repeater securely latches in place.

  • Page 22: Install And Verify Devices

    3–8 Installation NOTE The DECrepeater 90C can be installed into or removed from the DEChub 90 Ethernet backplane while power is applied to the backplane (hot swap). 3. If this is a new installation, supply power to the backplane. 4. All LEDs on the repeater turn on either immediately or at initial power-up.

  • Page 23: Management

    When you install the DECrepeater 90C in a DEChub 90 Ethernet backplane, you can manage the repeater by using a DECbridge 90 work group bridge. All commands that affect the DECrepeater 90C are part of the DECbridge 90 command set.

  • Page 24: Components Needed

    4–2 Management Components Needed You need the following components to manage a DECrepeater 90C online: • DEChub 90 backplane • DECbridge 90 work group bridge • DECrepeater 90C Accessing the MOP from VMS On a VMS operating system, the MOP console carrier is included as part of the network control program (NCP) facility, which requires a DECnet license.

  • Page 25: Accessing The Mop From Ultrix

    Management 4–3 Example Here is a typical VMS command to establish a session from a VAXstation 3100, using a bridge address of 08-00-2B-01-23-45 and the Ethernet circuit name SVA-0: $ MCR NCP CONNECT VIA SVA-0 PHYSICAL ADDRESS 08-00-2B-01-23-45 When you establish the connection, the screen displays the following: Console connected (press CTRL/D when finished) Accessing a Bridge Repeatedly If you need to access a specific bridge repeatedly, you can enter the...

  • Page 26: Console Carrier User Interface

    After you enter the correct password, or if there is no password, the DECbridge console carrier management banner and prompt display on the screen: Copyright © Digital Equipment Corporation 1991. DECbridge 90 V1.0 25-JAN-1991 08-00-2B-01-23-45 Flash EPROM V1.0 31-JAN-1991 DECbridge>...

  • Page 27: Console Carrier Command Language

    The system accepts unique abbreviations of commands. Table 4–1 summarizes the DECbridge commands that apply to the DECrepeater 90C. For a complete list of commands, see the DECbridge 90 Owner’s Manual. Table 4–1 Summary of DECrepeater 90 Commands...

  • Page 28: Command Parameters

    4–6 Management Command Parameters A start index or stop index for an address is a decimal index into the work group forwarding database in the range of 1 to 200. A slot number is a number from 1 through 8 that identifies a hub slot containing a DECrepeater 90.
  • Page 29 Management 4–7 DEFINE BRIDGE PASSWORD password string Lets you changes the password string. You are prompted twice for a new password. The password may be up to 16 characters long and is not displayed on the screen. The new password is saved. There is no corresponding SET command because the DEFINE BRIDGE PASSWORD takes effect immediately.
  • Page 30 When the DECbridge 90 is used with the DECrepeater 90C or 90T, this commands also displays the hub slot number and repeater port that each station is attached to. It may take several minutes for the SHOW ADDRESS command to accurately reflect the correct repeater port...
  • Page 31 The hub number may be 1 or 2, and the slot numbers may be 1 to 8. For the DECrepeater 90C, port numbers are 1 to 6. Example: The expected response to a SHOW PORT command is shown.
  • Page 32 4–10 Management Example: The response to a SHOW REPEATER command to a slot that contains a device other than a repeater is shown. DECbridge> SHOW REPEATER 1 No repeater responds. Example: The response to a SHOW REPEATER command to an empty slot is shown.

  • Page 33: Typical Management Techniques

    Management 4–11 Typical Management Techniques You can manage a DECrepeater 90C as a standalone unit or within a group of repeaters in a DEChub 90 backplane. For a standalone unit, you refer to the DECrepeater 90C LEDs for system status. In a DEChub 90 environment, you can refer to the LEDs and perform online management by using a DECbridge 90 work group bridge.

  • Page 34: Sample Configuration And Topology Map

    4–12 Management DE CBr id ge 9 0 DE Cser ver 08-00-2B-1D-07-21 90 L 08-00-2B-0F-19-23 H 4 0 0 5 DE Cr epeat er Pow er DECr epeat er Supply A UI Ca b le VT42 0 T h in w ire Ca b le Dis k S er v er M MJ...

  • Page 35: Management Session

    DECbridge> SHOW REPEATER Hub 1 slot 5 ThinWire repeater, rev.0, 6 ports. In this example, there is a ThinWire repeater (DECrepeater 90C) in the same hub as the bridge (hub 1), if this is a 2-hub configuration. The repeater is in slot 5 of the hub and has 6 ThinWire ports.

  • Page 36: If Problems Are Reported

    4–14 Management 2. Determine what stations are connected to the repeaters in the hub. DECbridge> SHOW ADDRESS Address 1: 08-00-2B-19-94-FB Address 2: 08-00-2B-1E-2D-0C hub 1 slot 5 port 3 This example indicates that a station with address 08-00-2B-1E-2D-0C is connected to the repeater in slot 5, on port 3. At this point, without physical examination, you have enough information to construct a network map.
  • Page 37 Management 4–15 The operational condition is normal. All other conditions cause the repeater to automatically partition the port. When the condition clears, the repeater automatically reconnects the port and reports it as operational again. To help solve intermittent problems, the repeater reports a segmentation count.

  • Page 38: Messages

    4–16 Management Messages Table 4–2 describes DECbridge 90 messages that apply to the DECrepeater 90C. For a complete list of messages, see the DECbridge 90 Owner’s Manual. Table 4–2 DECbridge 90 Messages This message . . . Indicates that . . .
  • Page 39 Hub h slot s not a The device does not use the same management protocol repeater as the DECrepeater 90C and 90T. The device’s ports, if any, cannot be managed by the DECbridge 90. Hub h slot s The repeater type in hub h slot s is not known to...

  • Page 40: Standalone Configuration Management

    Observe the LEDs on the DECrepeater to determine the network status. Figure 4–3 shows a typical standalone network topology map. Table 4–3 describes each LED and its function. DECrepeater 90C Port 1 Node - Address - Username Port 2 Node - Address - Username...

  • Page 41: Decrepeater 90C Status Leds

    Management 4–19 Note on LED Sequence After Power-Up After you power up a standalone DECrepeater 90C, all LEDs except the network activity LED remain on until an active connection, either hardware or network activity. This is a normal condition. After an active station is connected to one of the ports, the LED for the active port remains on and all other port LEDs turn off.

  • Page 42: Troubleshooting

    1. Verify the installation of the repeater The installation must meet the configuration rules in Chapter 2. 2. Note the fault condition. 3. Isolate the problem. Use Table 5–1 to troubleshoot a standalone DECrepeater 90C. Use Table 5–2 to troubleshoot a DECrepeater installed in a DEChub 90 configuration. 5–1...

  • Page 43: Decrepeater 90C Standalone Troubleshooting

    5–2 Troubleshooting DECrepeater 90C Standalone Troubleshooting Use Table 5–1 to troubleshoot a standalone DECrepeater 90C. Table 5–1 Troubleshooting a DECrepeater 90C Standalone Unit If... Then... Do this... All LEDs are off. Check the ac power Check that the power supply connection.
  • Page 44 Troubleshooting 5–3 Table 5–1 (Cont.) Troubleshooting a DECrepeater 90C Standalone Unit If... Then... Do this... All port LEDs are A connection has not Remove all network off. been made. connections (items Turn the repeater off and on by unplugging and replugging the power supply.
  • Page 45 5–4 Troubleshooting Table 5–1 (Cont.) Troubleshooting a DECrepeater 90C Standalone Unit If... Then... Do this... If the same condition Replace the DECrepeater 90C. exists when a good cable is plugged in, the DECrepeater 90C is defective. Continue installing The indicator LED for each...
  • Page 46 Troubleshooting 5–5 L J - 0 0 5 4 4 - T I 0...

  • Page 47: Decrepeater 90C Backplane Configuration Troubleshooting

    5–6 Troubleshooting DECrepeater 90C Backplane Configuration Troubleshooting Use Table 5–2 to troubleshoot a DECrepeater installed in a DEChub 90 configuration. Table 5–2 Troubleshooting a DECrepeater 90C in a DEChub 90 Backplane If... Then... Do this... The power LED is The DECrepeater Check the power LED on the off.
  • Page 48 Troubleshooting 5–7 Table 5–2 (Cont.) Troubleshooting a DECrepeater 90C in a DEChub 90 Backplane If... Then... Do this... If the power LED Make sure the DECrepeater turns on when 90C is properly seated in the reseated in the slot. same slot, the...
  • Page 49 5–8 Troubleshooting Table 5–2 (Cont.) Troubleshooting a DECrepeater 90C in a DEChub 90 Backplane If... Then... Do this... If the cable is not Connect the other end of this connected at the cable and terminate. other end. If the cable is Check the cable for continuity.

  • Page 50: Decrepeater 90C Specifications

    DECrepeater 90C Specifications This appendix provides the following specifications for the DECrepeater 90C: • Physical dimensions • Environmental specifications • Electrical specifications • Parts list Physical Dimensions Dimension Measurement Height 3.5 cm ( 1.4 in) Width 28.0 cm ( 11.0 in) Depth 14.0 cm ( 5.5 in)

  • Page 51: Environmental Specifications

    A–2 DECrepeater 90C Specifications Environmental Specifications The DECrepeater 90C is designed to operate in an office environment or equipment room environment such as telephone closets or satellite equipment rooms. It is not intended to operate in an air plenum. Operating Environment...

  • Page 52: Electrical Specifications

    DECrepeater 90C Specifications A–3 Electrical Specifications The DECrepeater 90C features either a self-contained power supply or self-contained power supply and power cord option. Power Supply Specification Value Voltage (domestic) 104 Vac to 128 Vac ( nominal 120 Vac) Voltage (international)

  • Page 53: Related Documentation

    Related Documentation You can order the following documents from Digital: Document Title Order Number DECbridge 90 Owner’s Manual EK–DEWGB–OM DEChub 90 Owner’s Manual EK–DEHUB–OM Open DECconnect Building Wiring EB–K2407–42 Components and Application Catalog DECrepeater 90T Owner’s Manual EK–DETMR–OM DECconnect System Planning and EK–DECSY–CG Configuration Guide B–1...

  • Page 54: Management Details

    Management Details Chapter 4 provides information on managing the DECrepeater 90C on a network or in a standalone configuration. This appendix provides more information on managing a DECrepeater 90C in a DEChub 90 backplane: • Designating a hub manager •...

  • Page 55: Annotating The Bridge Address Table

    C–2 Management Details If for some reason you do not want a specific DECbridge 90 unit to be the designated hub manager, you can disable the hub management features with the command DEFINE BRIDGE HUB_MANAGEMENT DISABLE. After the DECbridge 90 has become the designated hub manager, you can use SET or SHOW REPEATER and SET or SHOW PORT commands without restriction.

  • Page 56: Using The Wgb Address Table For Work Group Management

    Management Details C–3 As a worst-case example, if it takes 60 seconds for each of the allowed 200 stations to transmit a message, it could take 200 minutes to complete the address database annotations. However, the DECbridge 90 tries to hurry things along.

  • Page 57: Index

    Index Console carrier (Cont.) commands, 4–5 establishing a session from ULTRIX, 4–3 to 4–4 Address number, 4–6 establishing a session from VMS, 4–2 to 4–3 user interface, 4–4 Cover, 1–4 CSMA/CD, 1–1 Backplane connector, 1–4 DEChub 90, 1–1 10Base2, 1–1 BNC network connector, 1–4 DC OK indicator, 1–4, 4–19 Bridge names...
  • Page 58 2 Index Features, 1–1 Network activity indicator, 1–4, 4–19 Network connector (BNC), 1–4 Network control program (NCP), 4–2 Height, A–1 Networks Help command, 4–5 CSMA/CD, 1–1 Hub number, 4–6 IEEE 802.3, 1–1 Humidity, A–2 Operating IEEE 802.3, 1–1 altitude, A–2 Installation dew point, A–2 backplane, 3–6 to 3–8...
  • Page 59 Relative humidity, A–2 Temperature, A–2 Repeater maximum rate of change, A–2 managed, 1–1 Troubleshooting, 5–8 unmanaged, 1–1 DECrepeater 90C in DEChub 90 backplane, 5–6 to 5–8 Repeaters error messages, 4–16 disabling ports, 4–7 standalone DECrepeater 90C, port numbers, 4–9 5–2 to 5–4 show repeater command, 4–9...

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