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Maintaining T4000 FPCs



For optimum router performance, verify the condition of the FPCs. The router can have up to eight FPCs mounted vertically in the FPC card cage at the front of the chassis.


On a regular basis:

  • Check the LEDs on the craft interface directly above each FPC slot. During normal operation:

    • The green OK LED above the FPC on the craft interface lights steadily when the FPC is online and functioning normally.

    • The green OK LED blinks during startup.

    • The red FAIL LED above the FPC on the craft interface is not lit. If the FAIL is lit, see Troubleshooting the T4000 FPCs.

  • Check the LCD on the craft interface.

  • Use the show chassis fpc command to verify the status of installed FPCs. The value Online in the column labeled State indicates that the FPC is functioning normally.