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Maintaining the MX2020 Control Boards

 

Purpose

For optimum router performance, verify the condition of the Control Board and Routing Engine (CB-RE).

Action

On a regular basis:

  • Check the host subsystem LEDs on the craft interface. For more information about the LEDs and the display, see MX2000 Switch Fabric Board LED.

    During normal operations:

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

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

  • Check the LEDs on the control board portion of the CB-RE faceplate.

    During normal operations:

    • The green OK LED on the CB-RE faceplate is lit.

    • The red FAIL LED on the CB-RE faceplate is not lit.

  • Issue the show chassis environment cb command to check the status of the CB-REs. The output is similar to the following:

    user@host> show chassis environment cb

For further description of the output from the command, see the Junos OS System Basics and Services Command Reference  .