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Troubleshooting the MX960 DPCs

 

Problem

Description: The DPCs are not functioning normally.

Solution

  • Monitor the green LED labeled OK above the DPC on the craft interface as soon as a DPC is seated in an operating router.

    The Routing Engine downloads the DPC software to it under two conditions: the DPC is present when the Routing Engine boots Junos OS, and the DPC is installed and requested online through the CLI or push button on the front panel. The DPC then runs diagnostics, during which the OK LED blinks. When the DPC is online and functioning normally, the OK LED lights green steadily.

  • Make sure the DPC is properly seated in the midplane. Check that each ejector handle has been turned clockwise and is tight.

  • Check the OK/FAIL LED on the DPC and OK and FAIL DPC LEDs on the craft interface. When the DPC is online and functioning normally, the OK LED lights green steadily.

  • Issue the show chassis fpc command to check the status of installed DPCs. As shown in the sample output, the value Online in the column labeled State indicates that the DPC is functioning normally:

    user@host> show chassis fpc
    Note

    The show chassis fpc command displays the status of the DPCs.

    For more detailed output, add the detail option. The following example does not specify a slot number, which is optional:

    user@host> show chassis fpc detail

    For further description of the output from the commands, see the Junos OS Administration Library.