Maintaining MX240 Host Subsystem Components

Purpose

For optimum router performance, verify the condition of the host subsystem. The host subsystem comprises 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.

• Check the LEDs on the Routing Engine faceplate.

• 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                 45 degrees C / 113 degrees F
      CPU temperature             43 degrees C / 109 degrees F
      DRAM                      2048 MB
      Memory utilization          15 percent
      CPU utilization:
        User                       0 percent
        Background                 0 percent
        Kernel                     8 percent
        Interrupt                  0 percent
        Idle                      92 percent
      Model                          RE-S-1300
      Serial ID                      1000694968
      Start time                     2007-07-10 12:27:39 PDT
      Uptime                         1 hour, 40 minutes, 37 seconds
      Load averages:                 1 minute   5 minute  15 minute
                                         0.11       0.06       0.01
  Routing Engine status:
    Slot 1:
      Current state                  Backup
      Election priority              Backup (default)
      Temperature                 46 degrees C / 114 degrees F
      CPU temperature             42 degrees C / 107 degrees F
      DRAM                      2048 MB
      Memory utilization          13 percent
      CPU utilization:
        User                       0 percent
        Background                 0 percent
        Kernel                     0 percent
        Interrupt                  0 percent
        Idle                     100 percent
      Model                          RE-S-1300
      Serial ID                      1000694976
      Start time                     2007-06-19 14:17:00 PDT
      Uptime                         20 days, 23 hours, 51 minutes, 4 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                40 degrees C / 104 degrees F
    Power 1
      1.2 V                     1208 mV
      1.5 V                     1521 mV
      1.8 V                     1807 mV
      2.5 V                     2507 mV
      3.3 V                     3319 mV
      5.0 V                     5033 mV
      12.0 V                   12142 mV
      1.25 V                    1243 mV
      3.3 V SM3                 3312 mV
      5 V RE                    5059 mV
      12 V RE                  11968 mV
    Power 2
      11.3 V bias PEM          11253 mV
      4.6 V bias MidPlane       4814 mV
      11.3 V bias FPD          11234 mV
      11.3 V bias POE 0        11176 mV
      11.3 V bias POE 1        11292 mV
    Bus Revision               42
    FPGA Revision              1
  CB 1 status:
    State                      Online Standby
    Temperature                40 degrees C / 104 degrees F
    Power 1
      1.2 V                     1202 mV
      1.5 V                     1514 mV
      1.8 V                     1807 mV
      2.5 V                     2500 mV
      3.3 V                     3293 mV
      5.0 V                     5053 mV
      12.0 V                   12200 mV
      1.25 V                    1260 mV
      3.3 V SM3                 3319 mV
      5 V RE                    5059 mV
      12 V RE                  12007 mV
    Power 2
      11.3 V bias PEM          11311 mV
      4.6 V bias MidPlane       4827 mV
      11.3 V bias FPD          11330 mV
      11.3 V bias POE 0        11292 mV
      11.3 V bias POE 1        11311 mV
    Bus Revision               42
    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. The output is similar to the following:

user@host> show chassis environment cb 0
CB 0 status:
  State                      Online
  Temperature Intake         66 degrees C / 150 degrees F
  Temperature Exhaust A      67 degrees C / 152 degrees F
  Temperature Exhaust B      73 degrees C / 163 degrees F
  Power
    1.2 V                     1153 mV
    1.5 V                     1417 mV
    1.8 V                     1704 mV
    2.5 V                     2375 mV
    3.3 V                     3138 mV
    5.0 V                     4763 mV
    1.2 V Rocket IO           1160 mV
    1.5 V Rocket IO           1408 mV
    1.8 V RLDRAM              1717 mV
  I2C Slave Revision         15

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