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    Monitor the SSB status

    If the SSB fails, no information about the chassis components is available through the CLI.

    To monitor the SSB:

    1. Display the SSB Environmental Status
    2. Display the SSB Detailed Status
    3. Check the SSB LEDs

    Display the SSB Environmental Status

    Purpose

    To isolate problems in the SSB by checking the environmental status

    Action

    To display the SSB environmental status, use the following command:

    user@host> show chassis environment

    Sample Output

    user@host> show chassis environment
    Class Item                   Status     Measurement
    Power Power Supply A         Failed    
          Power Supply B         OK        
    Temp  FPC Slot 0             OK         27 degrees C / 80 degrees F
          FPC Slot 1             OK         30 degrees C / 86 degrees F
          FPC Slot 2             OK         26 degrees C / 78 degrees F
          FPC Slot 3             OK         25 degrees C / 77 degrees F
          Power Supply A         OK         28 degrees C / 82 degrees F
          Power Supply B         OK         24 degrees C / 75 degrees F
          SSB Slot 0             OK         25 degrees C / 77 degrees F
          Backplane              OK         21 degrees C / 69 degrees F
    Fans  Rear Fan               OK         Spinning at normal speed
          Upper Fan              OK         Spinning at normal speed
          Middle Fan             OK         Spinning at normal speed
          Bottom Fan             OK         Spinning at normal speed
    Misc  Craft Interface        OK        
    

    Meaning

    The command output displays the SSB status and temperature. The SSB status can be OK, Failed, or Absent.

    Display the SSB Detailed Status

    Purpose

    To display a more detailed SSB status information.

    Action

    To display a more detailed SSB status information, use the following command:

    user@host> show chassis ssb

    Sample Output

    user@host> show chassis ssb
    SSB status:
      Failover:                      0 time
      Slot 0:
        State:                         Master
        Temperature:                33 Centigrade
        CPU utilization:             0 percent
        Interrupt utilization:       0 percent
        Heap utilization:            0 percent
        Buffer utilization:          6 percent
        DRAM:                       64 Mbytes
        Start time:                    1999-01-15 22:05:36 UTC
        Uptime:                        21 hours, 21 minutes, 22 seconds
      Slot 1:
        State:                         Backup 
    

    Meaning

    The command output displays the number of times the mastership has changed, the SSB slot number 0 or 1, and the current state of the SSB: Master, Backup, or Empty. The command output displays the temperature of the air passing by the SSB, in degrees Centigrade. It also displays the total percentage of CPU, interrupt, heap space, and buffer space being used by the SSB processor, including the total DRAM available to the SSB processor. The command output displays the time when the SSB started running and how long the SSB has been running.

    To display the status for a particular SSB, use the following command:

    user@host> show chassis ssb slot

    Check the SSB LEDs

    Purpose

    Periodically check the SSB LEDs to verify that the SSB is online or offline and the type of task it is performing.

    Action

    To check the SSB LEDs, look on the faceplate at the front of the router (see Figure 1).

    Figure 1: SSB LEDs

    SSB LEDs

    The SSB has two groups of LEDs: online/offline LEDs and status LEDs. The online/offline LEDs indicate whether the SSB is online or offline. The status LEDs indicate what type of task the SSB is performing. Table 1 describes the LED states.

    Table 1: SSB LEDs

    Label

    Color

    State

    Description

    OFFLINE

    Amber

    On steadily

    SSB is offline.

    ONLINE

    Green

    On steadily

    SSB processor is running.

    MASTER

    Blue

    On steadily

    SSB is master.

    STATUS (left)

    Green

    Blinking

    SSB processor is running. Normally, the blinking is faint and becomes bright only when the SSB is processing many exceptions.

    STATUS (right)

    Green

    Flashing

    I/O interrupts are occurring.

     
     

    Published: 2012-08-20