I have a WLC that I need to replace with one that supports more APs. I have configured the new controller identically to the one I am replacing. When I put it into the network only 9 of the 12 APs connected, and all of the radios were showing down. Any thoughts on what I may have missed.
You need to enable the radios on the wlc. If you go to wireless | 802.11a/n or 802.11b/g/n, there is a setting to globally enable the radio.
Is the other 3 ap's still on the other wlc?