WLC AP association

Answered Question
Jul 22nd, 2007

I can see my AP via cdp neigh from the cli of the WLC, but the AP doesnt join to my WLC, whats wrong?

Correct Answer by Rob Huffman about 9 years 7 months ago

Hi Alejandro,


How's things?


This is a pretty common problem that is usually associated with one of 2 things;


1. The time setting on the WLC and the PC running the upgrade tool (must be in sync).


2. A problem with the SSC (Self Signed Certificate).


Have a look at these great threads from last year that provide answers to both problems.


http://forum.cisco.com/eforum/servlet/NetProf?page=netprof&forum=Wireless%20-%20Mobility&topic=General&CommCmd=MB%3Fcmd%3Dpass_through%26location%3Doutline%40%5E1%40%40.1ddb4d26


http://forum.cisco.com/eforum/servlet/NetProf?page=netprof&forum=Wireless%20-%20Mobility&topic=Getting%20Started%20with%20Wireless&CommCmd=MB%3Fcmd%3Dpass_through%26location%3Doutline%40%5E1%40%40.1ddaba5b


Here are some excellent docs;


Self-Signed Certificate Manual Addition to the Controller for LWAPP-Converted APs


http://www.cisco.com/en/US/products/ps6521/products_configuration_example09186a00806a426c.shtml


LWAPP Upgrade Tool Troubleshoot Tips


http://www.cisco.com/en/US/tech/tk722/tk809/technologies_tech_note09186a008072d9a1.shtml


Lightweight AP (LAP) Registration to a Wireless LAN Controller (WLC)


http://www.cisco.com/en/US/tech/tk722/tk809/technologies_tech_note09186a00806c9e51.shtml



Hope this helps!

Rob


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Correct Answer
Rob Huffman Mon, 07/23/2007 - 05:21

Hi Alejandro,


How's things?


This is a pretty common problem that is usually associated with one of 2 things;


1. The time setting on the WLC and the PC running the upgrade tool (must be in sync).


2. A problem with the SSC (Self Signed Certificate).


Have a look at these great threads from last year that provide answers to both problems.


http://forum.cisco.com/eforum/servlet/NetProf?page=netprof&forum=Wireless%20-%20Mobility&topic=General&CommCmd=MB%3Fcmd%3Dpass_through%26location%3Doutline%40%5E1%40%40.1ddb4d26


http://forum.cisco.com/eforum/servlet/NetProf?page=netprof&forum=Wireless%20-%20Mobility&topic=Getting%20Started%20with%20Wireless&CommCmd=MB%3Fcmd%3Dpass_through%26location%3Doutline%40%5E1%40%40.1ddaba5b


Here are some excellent docs;


Self-Signed Certificate Manual Addition to the Controller for LWAPP-Converted APs


http://www.cisco.com/en/US/products/ps6521/products_configuration_example09186a00806a426c.shtml


LWAPP Upgrade Tool Troubleshoot Tips


http://www.cisco.com/en/US/tech/tk722/tk809/technologies_tech_note09186a008072d9a1.shtml


Lightweight AP (LAP) Registration to a Wireless LAN Controller (WLC)


http://www.cisco.com/en/US/tech/tk722/tk809/technologies_tech_note09186a00806c9e51.shtml



Hope this helps!

Rob


rtford31 Thu, 07/26/2007 - 20:28

Do you have multiple APs already connected to your WLC? If so and you have clients attached to the WLC, the client can be multicast storming the WLC causing the new AP to not associate to the WLC. The AP probably gets an IP from the DHCP server and sends out an ARP request for the MAC address of the WLC - because the multicast storm caused by the clients the WLC can't reply to the AP before the TTL expires on the AP MAC address request causing it to reboot.

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