In the access point trace bundle( How to Collect Access Point Logging Information (Trace Bundle).
) you should see a file called ap-report.txt.x.gz. If you open that file you will see messages that say:
======== Access Point Problem Report =======
AP reboot due to poll-timeout
There is also a message that will let you know the path failure:
Testing link to HWC: 10.66.25.137, ...not reachable.
Testing link to Gateway: 10.44.10.254, ...not reachable.
Testing link to LoopBack: 127.0.0.1, ...reachable.
This info may help direct you to the failure spot.