Ap's Registration Fails With "did not recieve config response"

Question

Greetings, we have been running a Cisco 2106 controller for awhile now, following a recent reboot two out of the four AP's failed to re-register with the following messages.
Translating "CISCO-LWAPP-CONTROLLER.****************.local"...domain server (172.29.255.25) [OK]
%LWAPP-3-CLIENTEVENTLOG: Did not get vendor specific options from DHCP.
%LWAPP-3-CLIENTEVENTLOG: Did not get log server settings from DHCP.
%SYS-6-LOGGINGHOST_STARTSTOP: Logging to host 255.255.255.255 started - CLI initiated
%LWAPP-3-CLIENTEVENTLOG: Performing DNS resolution for CISCO-LWAPP-CONTROLLER..****************.local
%LWAPP-3-CLIENTEVENTLOG: Controller address 172.29.255.5 obtained through DNS
%LWAPP-5-CHANGED: LWAPP changed state to JOINEncoding the APType as 0
Encoding the RSSI threshhold as 0
Encoding the APType as 0
Encoding the RSSI threshhold as 0
%LWAPP-5-CHANGED: LWAPP changed state to CFG
Writing out the event log to nvram...
%LWAPP-3-CLIENTERRORLOG: Config Request Timer: did not recieve config response (controller - it-wlc-2106)
%SYS-5-RELOAD: Reload requested by LWAPP CLIENT. Reload Reason: DID NOT GET CONFIG RESPONSE.
%LWAPP-5-CHANGED: LWAPP changed state to DOWNXmodem file system is available.
flashfs[0]: 11 files, 3 directories
flashfs[0]: 0 orphaned files, 0 orphaned directories
flashfs[0]: Total bytes: 15998976
flashfs[0]: Bytes used: 7049728
flashfs[0]: Bytes available: 8949248
flashfs[0]: flashfs fsck took 30 seconds.
Base ethernet MAC Address: 00:1e:7a:be:63:60
Initializing ethernet port 0...
Reset ethernet port 0...
Reset done!
ethernet link up, 100 mbps, full-duplex
Ethernet port 0 initialized: link is up
The AP manager interface on the controller is 172.29.255.6 and the management interface is on 172.29.255.5, could anyone shed any light on what may be the problem, i have tried to hard reset the AP's with no effect.
Regards

Answer 1

Hi, I found a post from another person regarding the TFTP recovery on an 1131AG. I would try that and also make sure you have the CISCO-LWAPP-CONTROLLER static DNS entry set to the management (login) ip address of your WLC...
"Posted by: jaichauh - Network Engineer, CISCO SYSTEMS - Oct 1, 2008, 1:06pm PST
Yes,
You need to downlaod an IOS autonomous image and then upgrade it by using the following steps:
Step 1 The static IP address of the PC on which your TFTP server software runs should be between 10.0.0.2 and 10.0.0.30, as AP gets an IP of 10.0.0.1 after reset by default.
Step 2 Make sure that the PC contains the access point image file (such as c1130-k9w7-tar.124-3g.JA1.tar for an 1130 series access point) in the TFTP server folder (Root folder) and that the TFTP server is activated.
Step 3 Rename the access point image file in the TFTP server folder to c1130-k9w7-tar.default.
Step 5 Connect the PC to the access point using a Category 5 (CAT5) Ethernet cable.
Step 6 Disconnect power from the access point.
Step 7 Press and hold MODE while you reconnect power to the access point.
Step 8 Hold the MODE button until the status LED turns red (approximately 20 to 30 seconds) and then release.
Step 9 Wait until the access point reboots, as indicated by all LEDs turning green followed by the Status LED blinking green.
Step 10 After the access point reboots, reconfigure it using the GUI or the CLI.
HTH
-Jai"