i have a wireless controller module( NME-AIR-WLC25-K9) installed in a Cisco 2851 ISR, this setup is in my remote site, we are connected through MAN network. In our main office i have a cisco 4402 wireless controller. so whenever i install a AP in my remote site instead of joiining the remote site WLC, the access point joins my main office 4402 controller, i dont why it is happening, the AP is not even trying to join the remote site WLC.. i have not configured high availability and both these controller are in separate RF network.
the firmware version in NME-AIR-WLC25-K9 is 220.127.116.11 ...
the version in the other controller is 18.104.22.168
Please let me know what is else i need to check asap
Did you even see the AP trying to join the local controller? If the controller are in different domains, the AP will prefer the remote controller since it join that one first. Since you are running 5.2, try configure on the AP the primary controller with the name, and local IP address of the local controller, and then reboot the AP. See if after that the AP join. run debug capwap events enable to see if you see the AP event trying to join the controller.
That's not the point.
Presume you have two controllers: WLC-A and WLC-B.
You have an AP who you want to join WLC-A but instead will always join WLC-B.
The solution is to configure "High Avlailability" with WLC-A details entered as the Primary Controller. This will force the AP to join the correct controller: WLC-A.
Does this answer your question?