This article explains the meaning of the below alarm and steps to isolate the issue.
During this issue, below alarm were seen in RSI along with the mentioned log messages:
root@switch> show chassis alarms no-forwarding
2 alarms currently active
Alarm time Class Description
2024-10-08 11:28:19 IST Minor FPC 0 CPU Sensor too Warm
2024-09-10 19:31:39 IST Minor FPC 0 Fan 0 Fan/Blower Absent
Log messages:
Oct 8 11:28:19 alarmd[12252]: Alarm set: CB id=33554575, color=YELLOW, class=CHASSIS, reason=FPC 0 CPU Sensor too Warm
Oct 8 11:28:19 craftd[12266]: Minor alarm set, FPC 0 CPU Sensor too Warm
From chassisd logs:
Oct 8 12:10:34 chassisd[12251]: CHASSISD_SNMP_TRAP6: SNMP trap generated: Temperature back to normal (jnxContentsContainerIndex 7, jnxContentsL1Index 1, jnxContentsL2Index 0, jnxContentsL3Index 0, jnxContentsDescr FPC: EX2300-24T-DC @ 0/*/*, jnxOperatingTemp 63)
Oct 8 12:13:49 chassisd[12251]: CHASSISD_SNMP_TRAP6: SNMP trap generated: Over Temperature! (jnxContentsContainerIndex 7, jnxContentsL1Index 1, jnxContentsL2Index 0, jnxContentsL3Index 0, jnxContentsDescr FPC: EX2300-24T-DC @ 0/*/*, jnxOperatingTemp 64)
Oct 8 11:28:19 send: yellow alarm set, device m, reason FPC 0 CPU Sensor too Warm
From the above logs, it appears that the FPC 0 CPU sensor is reporting a "Too Warm" condition. Below steps can be performed to isolate the issue:
1) If the Fan is FRU, verify the Fan tray status. Check whether it is functioning properly.
> show chassis environment
2) If there is any issue with fan tray, it could be causing overheating issue.
3) Verify whether the above mentioned log messages related to temperature are observed in both messages and chassisd, which indicates the fan tray failure or any hardware fault in it.
4) Make sure that the environmental guidelines were followed Temperature control best practices, ensure that there will be no blocking of the airflow around the device.
5) Verify whether the room was properly ventilated to prevent over-heating.
6) Try to replace the faulty components, if the issue is with Fan tray replace it with a working Fan tray on the same slot to isolate whether the issue is with Fan or with Fan tray.
7) Try restarting FPC, can be done by > restart chassis or hard reboot can also be performed.
8) If issue exists after testing the above steps, replacement can be initiated for the faulty part.