We just set up an 1200 AP with WPA and all was well for that day, today of the 3 devices that access it only 2 will connect now. I get Authentication failed on the other. I have re-entered the WPA key a billion times now, I tried turning on some debugging in the CLI but it is apparent I do not know what I am doing/looking for . Any help would be great! At this point I could reconfigure I guess but I want to find out the problem.
No specific reason we could say about. Only constraint is software support for WPA-PSK. WPA-PSK is being supported by cisco for years now . So all the access point comes with a version that supports WPA-PSK.