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LWAP won't join LAN Controller

I have a Cisco 2504 LAN controller and 2602 AP's, I loaded the LW image onto 1 of the AP's and it gets a DHCP address from the controller and I can ping the controller from the from the AP but it will not join.  I get and error on the AP that it can not resolve the WLC, I am configuring for a remote site and do not have a DNS server available at this time.  Any help would be appreciated.
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Gareth Gudger
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It could be that the image you loaded is putting the LWAP into Mesh Mode, which will prevent it from joining a WLC.

Have you connected a console cable to the LWAP to see what the logging messages are reporting?

Also, if you connect to the LWAP with a serial cable you can login to the LWAP and run "show capwap client rcb" which should will say whether or not you are in Meshed mode.

Other reasons for a LWAP not joining a WLC could be country code or territory mismatched. Time/date might be really far off as well. Or it is having a problem with the cert on the WLC.
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Thanks for the reply.  I haven't worked with wireless much, can you explain meshed mode?
Below is the image that was loaded on the AP:

ap3g2-9w8-tar.default
Mesh mode is basically when an AP is acting as wireless bridge to one or more other APs. In that mode you will have trouble connecting it to a WLC. Were you able to check the mode it is operating in from the console cable?
Here are the results from the AP:

#show capwap client rcb
AdminState                  :  ADMIN_ENABLED
SwVer                       :  7.5.1.73
NumFilledSlots              :  2
Name                        :  
Location                    :  default location
MwarName                    :
MwarMacAddr                 :  
MwarHwVer                   :  0.0.0.0
ApMode                      :  Local
ApSubMode                   :  Not Configured
OperationState              :  DISCOVERY
CAPWAP Path MTU             :  576
LinkAuditing                :  disabled
AP Rogue Detection Mode     :  Enabled
AP Tcp Mss Adjust           :  Disabled
Predownload Status          :  None
Auto Immune Status          :  Disabled
RA Guard Status             :  Disabled
Efficient Upgrade State     :  Disabled
Efficient Upgrade Role      :  None
TFTP Server                 :  Disabled
802.11bg(0) Radio
ADMIN  State =  ENABLE [1]
OPER   State =    DOWN [1]
CONFIG State =      UP [2]
HW     State =      UP [4]
  Radio Mode                : Local
  GPR Period                : 0
  Beacon Period             : 0
  DTIM Period               : 0
  World Mode                : 1
  VoceraFix                 : 0
  Dfs peakdetect            : 1
  Fragmentation Threshold   : 0
  Current Tx Power Level    : 0
  Current Channel           : 11
802.11a(1) Radio
ADMIN  State =  ENABLE [1]
OPER   State =    DOWN [1]
CONFIG State =      UP [2]
HW     State =      UP [4]
  Radio Mode                : Local
  GPR Period                : 0
  Beacon Period             : 0
  DTIM Period               : 0
  World Mode                : 1
  VoceraFix                 : 0
  Dfs peakdetect            : 1
  Fragmentation Threshold   : 0
  Current Tx Power Level    : 0
  Current Channel           : 165
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Gareth Gudger
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It is running version 7.0.220.0 and below are the errors being logged:

 Could Not resolve CISCO-CAPWAP-CONTROLLER
*Sep 16 20:13:16.895: %CAPWAP-3-ERRORLOG: Discovery response from MWAR 'LVG_WLC_PRI'running version 7.0.220.0 is rejected.
*Sep 16 20:13:16.895: %CAPWAP-3-ERRORLOG: Failed to decode discovery response.
*Sep 16 20:13:16.895: %CAPWAP-3-ERRORLOG: CAPWAP SM handler: Failed to process message type 2 state 2.
*Sep 16 20:13:16.895: %CAPWAP-3-ERRORLOG: Failed to handle capwap control message from controller
*Sep 16 20:13:16.895: %CAPWAP-3-ERRORLOG: Failed to process unencrypted capwap packet from 192.168.254.2
*Sep 16 20:13:16.895: %CAPWAP-3-ERRORLOG: Discovery response from MWAR 'LVG_WLC_PRI'running version 7.0.220.0 is rejected.
*Sep 16 20:13:16.895: %CAPWAP-3-ERRORLOG: Failed to decode discovery response.
*Sep 16 20:13:16.895: %CAPWAP-3-ERRORLOG: CAPWAP SM handler: Failed to process message type 2 state 2.
*Sep 16 20:13:26.895: %CAPWAP-3-ERRORLOG: Discovery response from MWAR 'LVG_WLC_PRI'running version 7.0.220.0 is rejected.
*Sep 16 20:13:26.895: %CAPWAP-3-ERRORLOG: Failed to decode discovery response.
*Sep 16 20:13:26.895: %CAPWAP-3-ERRORLOG: CAPWAP SM handler: Failed to process message type 2 state 2.
*Sep 16 20:13:26.895: %CAPWAP-3-ERRORLOG: Failed to handle capwap control message from controller
*Sep 16 20:13:26.895: %CAPWAP-3-ERRORLOG: Failed to process unencrypted capwap packet from 192.168.254.2
*Sep 16 20:13:36.895: %CAPWAP-3-ERRORLOG: Discovery response from MWAR 'LVG_WLC_PRI'running version 7.0.220.0 is rejected.
*Sep 16 20:13:36.895: %CAPWAP-3-ERRORLOG: Failed to decode discovery response.
*Sep 16 20:13:36.895: %CAPWAP-3-ERRORLOG: CAPWAP SM handler: Failed to process message type 2 state 2.
*Sep 16 20:13:36.895: %CAPWAP-3-ERRORLOG: Failed to handle capwap control message from controller
*Sep 16 20:13:36.895: %CAPWAP-3-ERRORLOG: Failed to process unencrypted capwap packet from 192.168.254.2
*Sep 16 20:13:36.895: %CAPWAP-3-ERRORLOG: Discovery response from MWAR 'LVG_WLC_PRI'running version 7.0.220.0 is rejected.
*Sep 16 20:13:36.895: %CAPWAP-3-ERRORLOG: Failed to decode discovery response.
*Sep 16 20:13:36.895: %CAPWAP-3-ERRORLOG: CAPWAP SM handler: Failed to process message type 2 state 2.
*Sep 16 20:13:36.895: %CAPWAP-3-ERRORLOG: Failed to handle capwap control message from controller
*Sep 16 20:13:46.895: %CAPWAP-3-ERRORLOG: Discovery response from MWAR 'LVG_WLC_PRI'running version 7.0.220.0 is rejected.
*Sep 16 20:13:46.895: %CAPWAP-3-ERRORLOG: Failed to decode discovery response.
*Sep 16 20:13:46.895: %CAPWAP-3-ERRORLOG: CAPWAP SM handler: Failed to process message type 2 state 2.
*Sep 16 20:13:46.895: %CAPWAP-3-ERRORLOG: Failed to handle capwap control message from controller
What version of code do you have on the 2504 WLC?  You need at least v7.2.110.0 to join a 2602 AP.

If you install a new image on an AP it won't go straight into Mesh mode.  You 'have' to join it to a WLC first to configure it in Mesh mode - unless it was already in Mesh mode to start with.
The software version on the controller is 7.0.220.0
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