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show chassis environment pcg



(M40e and M160 routers only) Display environmental information about the Packet Forwarding Engine clock generators (PCGs).



Display environmental information about both PCGs.


(Optional) Display environmental information about an individual PCG. Replace slot with 0 or 1.

Required Privilege Level


Output Fields

Table 1 lists the output fields for the show chassis environment pcg command. Output fields are listed in the approximate order in which they appear.

Table 1: show chassis environment pcg Output Fields

Field Name

Field Description

PCG slot status

Slot number: 0 or 1.


Status of PCG:

  • Present—PCG is detected by the chassis process but is either not supported by the current version of Junos OS or PCG is coming up but is not yet online.

  • Online—PCG is powered down. If Online, it can be the Master clock or the Standby clock.

  • Offline—PCG is powered down.

  • Empty—No PCG is present.


Temperature of the air flowing past the PCG.


Frequency setting and measurement for the PCG.


Information about the voltage supplied to the PCG. The left column displays the required power, in volts. The right column displays the measured power, in millivolts.

BUS Revision

Revision level of the generic bus device.

Sample Output

show chassis environment pcg (M40e Router)

show chassis environment pcg (M160 Router)

Release Information

Command introduced before Junos OS Release 7.4.