This article explains how to deal with CCG Alarm as below,
3 alarms currently active
Alarm time Class Description
2025-10-06 16:00:43 PDT Minor CCG 0 Temp Sensor Fail
2025-10-06 15:59:42 PDT Major No CG Online
2025-10-06 15:59:42 PDT Minor CCG 0 Not Online
The CCG Failure alarm indicates a problem with the Centralised Clock Generator (CCG) 0 on PTX5000 device.
This alarm suggests that CCG 0 is not functioning correctly, which can affect the device's ability to synchronise timing across components.
The alarm can be triggered due to various reasons, including:
1. Hardware Failure: A malfunction in the CCG component itself.
2. Power Issues: Insufficient or unstable power supply to the CCG.
3. Temperature Problems: Overheating or abnormal temperature levels.
4. Communication Errors: Issues like I2C communication failures between the CCG and other components.
Collect the below output for CCG0 and try to restart the CCG0 via below command:
Please collect the outputs:
------------
show chassis environment ccg 0
show chassis alarms
Restart CCG0
request chassis ccg slot 0 offline
request chassis ccg slot 0 online
If the above doesn't work,
CCG replacement is suggested.
Here are some reference links for this component:
https://www.juniper.net/documentation/us/en/hardware/ptx5000/topics/topic-map/ptx5000-chassis.html#id-ptx5000-centralized-clock-generator-description
https://www.juniper.net/documentation/us/en/hardware/ptx5000/topics/topic-map/ptx5000-troubleshoot.html#id-troubleshooting-the-ptx5000-centralized-clock-generators