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Troubleshooting the T640 FPCs




The following LEDs indicate a problem:

  • The red FAIL LED above the FPC on the craft interface is lit.

  • The OK for the FPC on the craft interface is off.


  • If the red FAIL LED above the FPC is on, look at the display on the craft interface to check the status of the FPC and the PICs that are plugged into it.

  • Make sure the FPC is properly seated in the midplane. Verify that each ejector handle has been turned clockwise and is tight. Use a screwdriver to verify that the screws inside the ejector handles are tight.

  • To check the status of an FPC, use the following CLI command:

    user@host> show chassis fpc

    To display more detailed information, use the following option:

    user@host> show chassis fpc detail

Table 1: FPC Alarm Messages

Alarm Type

Craft Interface Message

CLI Message


FPC fpc-number unreachable PFEs detected

FPC fpc-number has unreachable destinations