AP unable to join WLC : MAC Address Problem?

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May 27th, 2010
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I have an 1031 AP in a remote office which can't join the controller in the HQ. I'm using DNS for WLC discovery and have both the LWAPP + CAPWAP DNS entries configured. AP has static IP + DNS.


Basically the AP resolves the DNS name then connects to the WLC but then the WLC resets the connection.


I've observed the following in the system log:


Here I have the Manager & AP-Manager gateway pointing to the HSRP virtual address on my two 6509 core switches:


*May 27 16:25:44.728: %SIM-3-GW_MISMATCH: sim.c:1018 MAC address of the GW 00:21:56:93:08:00 recieved in the JOIN Request differs from the cached MAC addr 00:00:0c:07:ac:63 of the Gw. Deleting the Gw IP 10.200.1.252 for the AP Mgr & sending


Here' I changed to the gateway to point to the IP on the VLAN SVI interface.


*May 27 16:29:28.338: %SIM-3-GW_MISMATCH: sim.c:1018 MAC address of the GW 00:21:56:93:08:00 recieved in the JOIN Request differs from the cached MAC addr 00:21:a1:23:08:00 of the Gw. Deleting the Gw IP 10.200.1.254 for the AP Mgr & sending


A point to note is that the 00:21 MAC address is the internal L3 router within the 6509.


Network summary:


HQ network is 2 x 6509 running HSRP.

WLC 4404 with LAG into Core 1 switch running 5.2 (can't rember the exact revision)

100Mb WAN link into MPLS cloud, router is also connected to Core 1


Remote office is a DS3 with 3750 switch.

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Rob Huffman Fri, 05/28/2010 - 06:07
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Hi Craig,


I think you are seeing this 5.x (and beyond) restriction



Controller  software release 5.0.148.0 or later is not compatible with Cisco  Aironet 1000 series access points.


http://www.cisco.com/en/US/docs/wireless/controller/release/notes/crn52.html



Cheers!

Rob

George Stefanick Fri, 05/28/2010 - 08:15
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Craig,


Playing back to basics...


1) No FW between your controller and the remote office?

2) Have you tried putting a static address of the controller in the AP?

3) Are you using HREAP by chance?

Leo Laohoo Fri, 05/28/2010 - 18:40
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Can you try to upgrade to 6.X?  My doctors have recommended that I stay away from 5.X because it might give me an anaphylactic shock. 

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