AP is loosing IP details on interface wired0 after reboot

[tinkughosh16]

After reboot AP is loosing IP configuration but it has all the other configuration details. AP is not faulty because it's happening with 5 AP'S

[Rich R]

Already answered by me and Scott above previously.  Possibly caused by a bug.  Use DHCP with IP reservations rather than trying to configure static IPs.

Also be aware of the behaviour of CAPWAP APs to ignore the static IP and fallback to using DHCP, by design, in certain situations when discovering the WLC.  This is an automatic recovery mechanism for APs with possible invalid IP configuration.

https://www.cisco.com/c/en/us/support/docs/wireless/5500-series-wireless-controllers/119286-lap-notjoin-wlc-tshoot.html

[tinkughosh16]

Hello rrudling,

Previous i have tried all the above mentioned solutions but didn't worked even Cisco TAC could not able to provide proper solution.

How my problem got fixed:

We rebooted the WLC and upgrade it to the latest TAC recommend code.

[Rich R]

Well as a general rule upgrading to latest code should be your starting point to eliminate known bugs - after you've checked the release notes and tested first of course.

Reserved DHCP works fine for those who like fixed IP addresses - if that didn't work that would be a problem with your DHCP server (probably config) not the AP.

Looking back at the bugs I referenced before:

https://bst.cloudapps.cisco.com/bugsearch/bug/CSCwb24683 has now been terminated and CSCvz98899 has been dup'd to https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvz73546 which is fixed in the latest releases of IOS-XE.

[amora1977]

Hello.
I am having the same problem mentioned, the access point was registered to the controller, it basically worked for about three hours, then the ap lost ehternet connectivity and the wired0 interface appears down and does not show the ip, even when it has been set via static CLI, neither it works by DHCP, the AP does not receive ip, even when the others do.
AP model 9120AIX, firmware 17.8.1, now I don't know how to do a downgrade in case it's the code because the ap can't download the software via TFTP because it doesn't raise the ethernet interface.

[Rich R]

Post the complete console logs from power on.

What is the switch port configuration?

"show power inline" from the switch?