LWAP issues with a 5508 controller after AP upgrade

Question

Hi All, I’m having a few problems after upgrading my AP to a LWAP and hope you can help.
I have an AIR-AP1242AG-E-K9 which had c1240-k9w8-mx.124-21a.JA loaded, I followed the link below and upgraded with Cisco’s upgrade tool to c1240-rcvk9w8-mx with no problems at all, after the upgrade I could then see the LWAP on the 4402 controller and had it working a treat.
Now the problems begin, I brought it into the office where we have 5508 controllers, plug in the LWAP into our management switch and boot it up I get an IP assigned from the DHCP server and the AP goes into discovery mode but never finds the controller.
I have logged the boot process but this does not give much away, our other 1100 series AP’s boot fine, I was hoping that somebody here could help me resolve this issue.
Link to upgrade material.
http://www.cisco.com/en/US/docs/wireless/access_point/conversion/lwapp/upgrade/guide/lwapnote.html#wp169977
Console Boot Log.
Xmodem file system is available.
flashfs[0]: 9 files, 3 directories
flashfs[0]: 0 orphaned files, 0 orphaned directories
flashfs[0]: Total bytes: 15998976
flashfs[0]: Bytes used: 6848512
flashfs[0]: Bytes available: 9150464
flashfs[0]: flashfs fsck took 36 seconds.
Base ethernet MAC Address: 00:1d:45:01:03:0a
Initializing ethernet port 0...
Reset ethernet port 0...
Reset done!
ethernet link up, 100 mbps, full-duplex
Ethernet port 0 initialized: link is up
Loading "flash:/c1240-rcvk9w8-mx/c1240-rcvk9w8-mx"...##################################################################################################################################################################################################
File "flash:/c1240-rcvk9w8-mx/c1240-rcvk9w8-mx" uncompressed and installed, entry point: 0x3000
executing...
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Rights clause at FAR sec. 52.227-19 and subparagraph
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Software clause at DFARS sec. 252.227-7013.
           cisco Systems, Inc.
           170 West Tasman Drive
           San Jose, California 95134-1706
Cisco IOS Software, C1240 Software (C1240-RCVK9W8-M), Version 12.4(10b)JDA, RELEASE SOFTWARE (fc1)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2008 by Cisco Systems, Inc.
Compiled Thu 30-Oct-08 12:05 by prod_rel_team
Image text-base: 0x00003000, data-base: 0x003C24A0
Initializing flashfs...
flashfs[1]: 9 files, 3 directories
flashfs[1]: 0 orphaned files, 0 orphaned directories
flashfs[1]: Total bytes: 15998976
flashfs[1]: Bytes used: 6848512
flashfs[1]: Bytes available: 9150464
flashfs[1]: flashfs fsck took 5 seconds.
flashfs[1]: Initialization complete....done Initializing flashfs.
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[email protected].
cisco AIR-AP1242AG-E-K9   (PowerPCElvis) processor (revision A0) with 24566K/8192K bytes of memory.
Processor board ID FCZ1131825Y
PowerPCElvis CPU at 262Mhz, revision number 0x0950
Last reset from power-on
LWAPP image version 3.0.51.0
1 FastEthernet interface
32K bytes of flash-simulated non-volatile configuration memory.
Base ethernet MAC Address: 00:1D:45:01:03:0A
Part Number                         : 73-10256-06
PCA Assembly Number                 : 800-26918-05
PCA Revision Number                 : A0
PCB Serial Number                   : FOC11296730
Top Assembly Part Number             : 800-29233-01
Top Assembly Serial Number           : FCZ1131825Y
Top Revision Number                 : A0
Product/Model Number                 : AIR-AP1242AG-E-K9  
The name for the keys will be: ap.cisco.com
% The key modulus size is 1024 bits
% Generating 1024 bit RSA keys, keys will be non-exportable...[OK]
ip ssh version 2
   ^
% Invalid input detected at '^' marker.
transport input ssh
                 ^
% Invalid input detected at '^' marker.
aaa new-model
^
% Invalid input detected at '^' marker.
aaa authentication login default enable local none
^
% Invalid input detected at '^' marker.
o
^
% Invalid input detected at '^' marker.
Press RETURN to get started!
*Mar 1 00:00:08.640: %LINK-3-UPDOWN: Interface FastEthernet0, changed state to up
*Mar 1 00:00:09.675: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0, changed state to up
*Mar 1 00:00:12.131: %SYS-5-RESTART: System restarted --
Cisco IOS Software, C1240 Software (C1240-RCVK9W8-M), Version 12.4(10b)JDA, RELEASE SOFTWARE (fc1)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2008 by Cisco Systems, Inc.
Compiled Thu 30-Oct-08 12:05 by prod_rel_team
transport input ssh
                 ^
% Invalid input detected at '^' marker.
logging origin-id string AP:001d.4501.030a
         ^
% Invalid input detected at '^' marker.
logging 255.255.255.255
       ^
% Invalid input detected at '^' marker.
logging trap 3
       ^
% Invalid input detected at '^' marker.
*Mar 1 00:00:28.149: %LWAPP-5-CHANGED: LWAPP changed state to DISCOVERY
*Mar 1 00:00:28.627: Logging LWAPP message to 255.255.255.255.
%DHCP-6-ADDRESS_ASSIGN: Interface FastEthernet0 assigned DHCP address 172.30.156.66, mask 255.255.255.224, hostname AP001d.4501.030a
Translating "CISCO-LWAPP-CONTROLLER. somedomain.com "...domain server (172.22.7.22)
%LWAPP-3-CLIENTEVENTLOG: Did not get vendor specific options from DHCP.
%LWAPP-3-CLIENTEVENTLOG: Did not get log server settings from DHCP.
%CDP_PD-4-POWER_OK: Full power - NEGOTIATED inline power source (172.22.7.23)
%LWAPP-3-CLIENTEVENTLOG: Performing DNS resolution for CISCO-LWAPP-CONTROLLER. somedomain.com
%LWAPP-3-CLIENTERRORLOG: DNS Name Lookup: could not resolve CISCO-LWAPP-CONTROLLER.somedomain.com
%CDP_PD-4-POWER_OK: Full power - NEGOTIATED inline power source
And that is where she sits and does nothing more, I have noticed the DNS problems but the other 1100 series LWAP’s boot up after show that same issue.

Answer 1

Hi,
If new ap's arent on the same subnet as the controller's management interface, you've got to 'tell' them how initially find the controller.
Dns and dhcp option 43 are the most common methods:
http://www.cisco.com/en/US/products/ps6366/products_tech_note09186a00808f8599.shtml#backinfo