Had an issue joining a Cisco 2800 AP to a Cisco Wireless Controller
So the first thing to check is country code of the AP and controller and the time.
The AP is a -E and the country is on the controller:
Time looks ok:
To the console!!!
debug capwap errors enable
Looks like this controller version 126.96.36.199 isnt compatible with 2800s:
Time to upgrade.
First check the APs are compatible with the version you are going too:
Looks ok. Next download it (oh also download the code you currently have installed in case you need it!) and while you’re waiting backup the controller config:
Before you reboot, go to the CLI:
Check the version:
Show ap image all
Pre-image the APs:
config ap image predownload primary all
Check the progress:
Reboot the controller via the GUI.