Step 3: Display the Packet Forwarding Engine Current Clock Source

The Packet Forwarding Engine current clock source is the master PCG.

Action

To display the PCG master from the Packet Forwarding Engine clock source output, use the following CLI command:

user@host> show chassis clocks 

Sample Output

user@host> show chassis clocks

PFE clock status:

  Current source            PCG 0

  Measured frequency        125.03 MHz

Reference clock status:

  Current source            Primary

  Primary source            Internal

  Secondary source          Internal

  Tertiary source           Internal

  Rollover algorithm        Holdover

  PLL mode                  Free-running

  PLL errors                0

  Sync message current      0x00

  Sync message normal       0x00

  Sync message override     0x00 

What It Means

The command output shows that the PCG in slot 0 is the primary clock source.