Maintaining the T1600 Control Boards

Purpose

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

Action

• Check the host subsystem LEDs on the craft interface. For more information about the LEDs and the display, see T1600 Craft Interface Description.

  During normal operations:

  • 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.
• Check the LEDs on the control board faceplate.

  During normal operations:

  • The green OK LED on the control board faceplate is 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 T-CBs. The output is similar to the following:
  user@host> show chassis environment cb

  CB 0 status:
    State                           Online Master
    Temperature                  29 degrees C / 84 degrees F
    Power:
      1.8 V                    1809 mV
      2.5 V                    2496 mV
      3.3 V                    3295 mV
      4.6 V                    4687 mV
      5.0 V                    5042 mV
      12.0 V                  11985 mV
      3.3 V bias               3277 mV
      8.0 V bias               7472 mV
    GBUS Revision                40
    FPGA Revision                 7
  
  

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