Step 1: Monitor the PCG Environmental Status

Action

To monitor the PCG environment status, use the following JUNOS software command-line interface (CLI) command:

user@host> show chassis environment

Sample Output

user@host> show chassis environment

Class Item                   Status     Measurement

Power PEM 0                  OK        

      PEM 1                  OK        

Temp  PCG 0                  OK         41 degrees C / 105 degrees F

      PCG 1                  OK         39 degrees C / 102 degrees F

[...Output truncated...]

What It Means

The command output displays the status and temperature for each PCG.

Alternative Action

If there is a problem with the PCG status, you can display more detailed PCG environmental information with the following CLI command:

user@host> show chassis environment pcg

The command output is as follows:

user@host> show chassis environment pcg

PCG 0 status:

  State                           Online - PFE clock source

  Temperature                  41 degrees C / 105 degrees F

  Frequency:

    Setting                125.00 MHz

    Measurement            125.03 MHz

  Power:

    3.3 V                    3266 mV

    5.0 V bias               4981 mV

    8.0 V bias               8168 mV

  CMB Revision                 12

PCG 1 status:

  State                           Online

  Temperature                  39 degrees C / 102 degrees F

  Frequency:

    Setting                125.00 MHz

    Measurement            125.03 MHz

  Power:

    3.3 V                    3271 mV

    5.0 V bias               4971 mV

    8.0 V bias               8175 mV

  CMB Revision                 12

The command output displays the status for each PCG slot 0 and 1. The operating status can be Present, Online, Offline, or Empty. If Online, it can be the current PFE clock source or backup. The command output displays the temperature of the air flowing past the PCG and the frequency setting and measurement for the PCG. The command output also displays information about the PCG power supplies and the revision level of the chassis management bus (CMB) slave.