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    Checklist for Monitoring Redundant SSBs

    Purpose

    You monitor redundant M20 router System and Switch Boards (SSBs) to ensure that they do the following (see Table 1):

    • Provide allocation of incoming data packets throughout shared memory on the Flexible PIC Concentrators (FPCs)
    • Transfer outgoing data cells to the FPCs for packet reassembly
    • Perform route lookups using the forwarding table, and monitor system components for failure and alarm conditions
    • Monitor FPC operation and reset

    Action

    Table 1: Checklist for Monitoring Redundant SSBs

    Monitor Redundant SSB Tasks

    Command or Action

    Display Redundant SSB Configuration

    configure
    show

    Displaying Redundant SSB Hardware Information

    show chassis hardware

    Monitor Redundant SSB Status
    1. Display the Redundant SSB Environmental Status

    show chassis environment

    1. Display the Redundant SSB Detailed Status

    show chassis ssb slot

    1. Check the Redundant SSB LEDs

    Check the LEDs on the SSB faceplate.

    Displaying Redundant SSB Mastership
    1. Display SSB Mastership from the Command Line

    show chassis ssb

    1. Check the SSB Mastership from the LEDs

    Check the LEDs on the SSB panel of the craft interface.

    Check for SSB Alarms
    1. Display the Current SSB Alarms

    show chassis alarms

    1. Display SSB Error Messages in the System Log File

    show log messages

    1. Display SSB Error Messages in the Chassis Daemon Log File

    show log chassisd

    Verify SSB Failure
    1. Check the SSB Connection

    Check the thumbscrews on the left and right sides of the SSB.

    1. Perform a Swap Test on the SSB
    1. Take the SSB offline.
    2. Remove the SSB.
    3. Replace the SSB with one that you know works.
    4. Verify that the new SSB works by using the show chassis ssb command.
    Switch SSB Mastership

    request chassis ssb master switch <no-confirm>

    Replace the SSB
    1. Take the SSB offline.
    2. Remove the SSB.
    3. Install a new SSB.
    4. Verify that the new SSB works by using the show chassis ssb command.
     

    Related Documentation

     

    Published: 2012-08-20