Juniper M Series User Manual

user@host> show chassis craft-interface
Sample Output
user@host> show chassis craft-interface
[...Output truncated...]
PCG LEDs:
PCG 0 1
--------------
Amber . .
Green * *
Blue * .
[...Output truncated...]
Meaning The command output shows that PCG 0 is the master because the blue MASTER LED is
on.
Check the PCG LED States for PCG Mastership on the Faceplate
Purpose To determine the PCG mastership from the PCG LEDs on the faceplate.
Action To check the PCG LEDs, look on the PCG faceplate at the rear of the M40e or M160 router
chassis (see “PCG Overview” on page 467). If the blue MASTER LED on the PCG faceplate
is on steadily, the PCG is functioning as master (see “Check the PCG LED States on the
Faceplate” on page 470).
Display the Packet Forwarding Engine Current Clock Source
Purpose 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 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
Meaning The command output shows that the PCG in slot 0 is the primary clock source.
471Copyright © 2012, Juniper Networks, Inc.
Chapter 20: Monitoring the PCG

Juniper M Series Specifications

General

Brand	Juniper
Model	M Series
Category	Network Router
Language	English