JUNOS Internet Software Network Operations Guide: Hardware
600 ! Displaying PCG Failure Alarms
Step 2: Check 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. Table 126 on page 599 describes the PCG LED states. If the blue
MASTER LED on the PCG faceplate is on steadily, the PCG is functioning as master.
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 or
master.
Displaying PCG Failure Alarms
Action To display the current PCG alarms, use the following CLI command:
user@host> show chassis alarms
Sample Output
user@host> show chassis alarms
2 alarms currently active
Alarm time Class Description
2002-06-11 20:30:29 PDT Minor PCG 0 Not Online
2002-06-11 20:30:32 PDT Minor No PCGs Online
What It Means The command output displays the alarm date, time, severity level, and description.
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