AP not joining to WLC

Question

Hi,
After a wireless network interruption, one of MAP 1522  it's  not joining to WLC .
What should I do to solve this problem?
Thanks.
(Cisco Controller) >show ap join stats detailed 00:08:30:bb:53:20
Discovery phase statistics
- Discovery requests received.............................. 7
- Successful discovery responses sent...................... 5
- Unsuccessful discovery request processing................ 0
- Reason for last unsuccessful discovery attempt........... Not applicable
- Time at last successful discovery attempt................ Feb 23 11:25:16.137
- Time at last unsuccessful discovery attempt.............. Not applicable
Join phase statistics
- Join requests received................................... 2
- Successful join responses sent........................... 2
- Unsuccessful join request processing..................... 2
- Reason for last unsuccessful join attempt................ RADIUS authorization is pending for the AP
- Time at last successful join attempt..................... Feb 23 11:25:28.385
- Time at last unsuccessful join attempt................... Feb 23 11:25:28.386
Configuration phase statistics
- Configuration requests received.......................... 3
- Successful configuration responses sent.................. 1
- Unsuccessful configuration request processing............ 0
- Reason for last unsuccessful configuration attempt....... Not applicable
- Time at last successful configuration attempt............ Feb 23 11:25:28.581
--More-- or (q)uit
- Time at last unsuccessful configuration attempt.......... Not applicable
Last AP message decryption failure details
- Reason for last message decryption failure............... Not applicable
Last AP disconnect details
- Reason for last AP connection failure.................... Timed out while waiting for ECHO repsonse from the AP
- Last AP disconnect reason................................ AP's capwap state machine restarted
Last join error summary
- Type of error that occurred last......................... AP got or has been disconnected
- Reason for error that occurred last...................... Timed out while waiting for ECHO repsonse from the AP
- Time at which the last join error occurred............... Mar 18 19:07:28.864
AP disconnect details
- Reason for last AP connection failure.................... Timed out while waiting for ECHO repsonse from the AP

Answer 1

Ioan,
as you see here:
Reason for last unsuccessful join attempt................ RADIUS authorization is pending for the AP
It seems you need to add a mac filter for this AP on you WLC so it joins.
Or, if you are using external radius for authorization, you need to add an entery for this AP on the radius server.
Here are some links that may help:
http://www.cisco.com/en/US/products/ps6366/products_tech_note09186a00808f8599.shtml#p5
http://www.cisco.com/en/US/products/ps6366/products_configuration_example09186a00808c7234.shtml
Don't please forget to rate the reply if it is useful.
Cheers,
Amjad