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    Checklist for Monitoring the PCG

    Purpose

    To monitor the Packet Forwarding Engine Clock Generator (PCG) to ensure that a clocking signal is generated to synchronize the internal M40e and M160 router Packet Forwarding Engine components. (See Table 1.)

    Action

    Table 1: Checklist for Monitoring the PCG

    Monitor PCG Tasks

    Command or Action

    Monitor the PCG Status

    1. Monitor the PCG Environmental Status

    show chassis environment

    show chassis environment pcg

    1. Display the PCG LED States at the Command Line

    show chassis craft-interface

    1. Check the PCG LED States on the Faceplate

    Remove the rear component cover and look on the PCG faceplate at the back of the M40e or M160 router chassis.

    Determine PCG Mastership

    1. Display the PCG Master in the Craft Interface Output

    show chassis craft-interface

    1. Check the PCG LED States for PCG Mastership on the Faceplate

    Remove the rear component cover and look on the PCG faceplate at the rear of the M40e or M160 router chassis.

    1. Display the Packet Forwarding Engine Current Clock Source

    show chassis clocks

    Display PCG Alarms

    1. Display Current PCG Alarms

    show chassis alarms

    1. Display PCG Error Messages in the System Log File

    show log messages

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

    show log chassisd

    Verify PCG Failure

    1. Check the PCG Connection

    Check the thumbscrew on the right side of the PCG.

    1. Check the PCG Fuses

    The M40e and M160 router fuses are located in a fuse box at the rear of the midplane, behind the lower rear impeller assembly.

    1. Perform a PCG Swap Test
    1. Take the PCG offline.
    2. Replace the PCG with one that you know works.
    3. Bring the PCG online.
    4. Check the PCG status.

    Obtain PCG Hardware Information

    1. Display the PCG Hardware Information

    show chassis hardware

    1. Locate the PCG Serial Number ID Label

    Look on the top of the PCG, close to the midplane connector.

    Replace the PCG

    See Return the Failed Component, or follow the procedure in the M40e or M160 router hardware guide.

     

    Related Documentation

     

    Published: 2012-08-20