Maintaining the T640 SIBs

Purpose

For optimum router performance, verify the condition of the SIBs.

Action

• Observe the status of the SIBs by checking the LEDs on the SIB faceplate. During normal operations:

  • The green OK LED on the SIB faceplate is lit.
  • The yellow FAIL LED on the SIB faceplate is not lit.
• To check the status of the SIBs using the CLI, issue the show chassis environment sib command. The output is similar to the following:
  user@host> show chassis environment sib

    State                      Online - Standby
    Temperature                32 degrees C / 89 degrees F
    Power
      GROUND                       0 mV
      1.8 V                     1789 mV
      1.8 V bias                1799 mV
      2.5 V                     2478 mV
      3.3 V                     3321 mV
      3.3 V bias                3286 mV
      5.0 V bias                5001 mV
      8.0 V bias                7008 mV
  SIB 1 status:
    State                      Online
    Temperature                33 degrees C / 91 degrees F
    Power
      GROUND                       0 mV
      1.8 V                     1807 mV
      1.8 V bias                1794 mV
      2.5 V                     2483 mV
      3.3 V                     3306 mV
      3.3 V bias                3299 mV
      5.0 V bias                5008 mV
      8.0 V bias                7072 mV
  SIB 2 status:
    State                      Online
    Temperature                34 degrees C / 93 degrees F
    Power
      GROUND                       0 mV
      1.8 V                     1802 mV
      1.8 V bias                1789 mV
      2.5 V                     2493 mV
      3.3 V                     3306 mV
      3.3 V bias                3291 mV
      5.0 V bias                5001 mV
      8.0 V bias                6964 mV
  SIB 3 status:
    State                      Online
    Temperature                31 degrees C / 87 degrees F
    Power
      GROUND                       0 mV
      1.8 V                     1794 mV
      1.8 V bias                1794 mV
      2.5 V                     2505 mV
      3.3 V                     3296 mV
      3.3 V bias                3299 mV
      5.0 V bias                5020 mV
      8.0 V bias                6822 mV
  SIB 4 status:
    State                      Online
    Temperature                35 degrees C / 95 degrees F
    Power
      GROUND                       0 mV
      1.8 V                     1802 mV
      1.8 V bias                1794 mV
      2.5 V                     2485 mV
      3.3 V                     3321 mV
      3.3 V bias                3286 mV
      5.0 V bias                4976 mV
      8.0 V bias                7103 mV
  

For more information about using the CLI, see the Junos OS System Basics and Services Command Reference .