Is there a way I can debug a client connection from the wireless lan controller?
Yes, you can debug up to 10 clients from the wlc.
(Cisco Controller) >debug client ? <MAC addr1> Enter MAC address client Enables debugs for common client problems for upto 10 clients.
(Cisco Controller) >debug client aa:bb:cc:dd:ee:ff
aa:bb:cc:dd:ee:ff Is your clients MAC address.