I am running a small Cisco WLAN with about 20 APs (all 1242) that are managed by two WLC 4402 (running v184.108.40.206).
WLCs are in Mobility group, serveral WLANs/VLANs are configured (including 802.1x, guest access with WebAuthentication etc.). All APs are configured for the same WLC as primary and the other as secondary. Everthing was working fine until I tried to upgrade another AP from IOS to LWAPP using the Cisco Upgrade tool.
After the AP was flashed and rebooted it started to discover a WLC but fails. The console messages look like this:
*Mar 1 00:00:05.962: %CDP_PD-4-POWER_OK: Full power - AC_ADAPTOR inline power source
*Mar 1 00:00:06.952: %LINK-3-UPDOWN: Interface FastEthernet0, changed state to up
*Mar 1 00:00:07.952: %LINEPROTO-5-UPDOWN:
ap> Line protocol on Interface FastEthernet0, changed state to up
*Mar 1 00:00:25.960: %LWAPP-5-CHANGED: LWAPP changed state to DISCOVERY
Translating "CISCO-LWAPP-CONTROLLER.xxx.yyy"...domain server (10.x.y.z)
*Mar 1 00:00:35.348: %DHCP-6-ADDRESS_ASSIGN: Interface FastEthernet0 assigned DHCP address 10.x.y.z, mask 255.255.254.0, hostname AP0019.3076.fe30
*Mar 1 00:00:36.349: LWAPP_CLIENT_ERROR: lwapp_name_lookup - Could Not resolve CISCO-LWAPP-CONTROLLER.xxx.yyy
*Mar 1 00:00:46.398: %LWAPP-5-CHANGED: LWAPP changed state to JOIN
*Mar 1 00:00:54.397: LWAPP_CLIENT_ERROR_DEBUG: spamHandleJoinTimer: Did not recieve the Join response
*Mar 1 00:00:54.397: LWAPP_CLIENT_ERROR_DEBUG: No more AP manager IP addresses remain.
*Mar 1 00:00:54.397: %SYS-5-RELOAD: Reload requested by LWAPP CLIENT. Reload Reason: DID NOT GET JOIN RESPONSE.
*Mar 1 00:00:54.398: %LWAPP-5-CHANGED: LWAPP changed state to DOWN
The switchport of the AP is configured for the same VLAN as the management and ap-management interface of the controller (not native VLAN), the primary controller is set to master controller mode and I see no other error messages (e. g. on the WLC).
Does anyone know how to fix this problem?
(even adding a "CISCO-LWAPP-CONTROLLER" host in the DNS does not help!!!)