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Maintaining the T640 Control Boards

 

Purpose

For optimum router performance, verify the condition of the router’s control boards.

Action

On a regular basis:

  • Check the LEDs on the control board faceplate. During normal operations:

    • The green OK LED on the control board faceplate is lit.

    • The green host subsystem OK LED on the craft interface is lit.

    • The red host subsystem FAIL LED on the craft interface is not lit.

    • The yellow FAIL LED on the control board faceplate is not lit.

  • Issue the show chassis environment cb command to check the status of the control boards. The output is similar to the following:

    user@host> show chassis environment cb

For further description of the output from the commands, seeshow chassis environment cb.