Maintaining the MX960 Host Subsystem

Purpose

For optimum router performance, verify the condition of the host subsystem. The host subsystem includes an SCB and a Routing Engine installed into a slot in the SCB.

Action

On a regular basis:

• Check the LEDs on the craft interface to view information about the status of the Routing Engines.

• Check the LEDs on the SCB faceplate (see Table 9 in SCB-MX Description).

• Check the LEDs on the Routing Engine faceplate (see Table 10 in MX960 Routing Engine Description).

• To check the status of the Routing Engines, issue the show chassis routing-engine command. The output is similar to the following:

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  user@host> show chassis routing-engine
  
  Routing Engine status:
    Slot 0:
      Current state                  Master
      Election priority              Master (default)
      Temperature                 39 degrees C / 102 degrees F
      CPU temperature             47 degrees C / 116 degrees F
      DRAM                      3584 MB
      Memory utilization          10 percent
      CPU utilization:
        User                       0 percent
        Background                 0 percent
        Kernel                     6 percent
        Interrupt                  0 percent
        Idle                      94 percent
      Model                          RE-S-2000
      Serial ID                      1000639065
      Start time                     2006-11-07 11:42:58 PST
      Uptime                         53 minutes, 35 seconds
      Load averages:                 1 minute   5 minute  15 minute
                                         0.06       0.07       0.02
  Routing Engine status:
    Slot 1:
      Current state                  Backup
      Election priority              Backup (default)
      Temperature                 42 degrees C / 107 degrees F
      CPU temperature             50 degrees C / 122 degrees F
      DRAM                      3584 MB
      Memory utilization           9 percent
      CPU utilization:
        User                       0 percent
        Background                 0 percent
        Kernel                     0 percent
        Interrupt                  0 percent
        Idle                     100 percent
      Model                          RE-S-2000
      Serial ID                      1000664335
      Start time                     2006-11-02 18:35:01 PST
      Uptime                         4 days, 18 hours, 1 minute, 28 seconds
   

• To check the status of the SCBs, issue the show chassis environment cb command. The output is similar to the following:

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  user@host> show chassis environment cb
  
  CB 0 status:
    State                      Online Master
    Temperature                26 degrees C / 78 degrees F             
    Power 1                    
      1.2 V                     1202 mV
      1.5 V                     1508 mV
      1.8 V                     1830 mV
      2.5 V                     5053 mV
      3.3 V                     6593 mV
      5.0 V                     5111 mV
      12.0 V                   12181 mV
      1.25 V                    1263 mV
      3.3 V SM3                 6593 mV
      5 V RE                    5078 mV
      12 V RE                  12007 mV
    Power 2                    
      11.3 V bias PEM          11253 mV
      4.6 V bias MidPlane       4827 mV
      11.3 V bias FPD          11408 mV
      11.3 V bias POE 0        11446 mV
      11.3 V bias POE 1        11408 mV
    Bus Revision               6
    FPGA Revision              0
  CB 1 status:
    State                      Online Standby
    Temperature                27 degrees C / 80 degrees F             
    Power 1                    
      1.2 V                     1214 mV
      1.5 V                     1517 mV
      1.8 V                     1814 mV
      2.5 V                     2507 mV
      3.3 V                     3312 mV
      5.0 V                     5136 mV
      12.0 V                   12142 mV
      1.25 V                    1256 mV
      3.3 V SM3                 3306 mV
      5 V RE                    5085 mV
      12 V RE                  11949 mV
    Power 2                    
      11.3 V bias PEM          11369 mV
      4.6 V bias MidPlane       4814 mV
      11.3 V bias FPD          11427 mV
      11.3 V bias POE 0        11350 mV
      11.3 V bias POE 1        11330 mV
    Bus Revision               39
    FPGA Revision              1
  

To check the status of a specific SCB, issue the show chassis environment cb command and include the slot number of the SCB—for example, show chassis environment cb 0.

For more information about using the CLI, see the Junos OS manuals.