I upgraded my 4404-100 WLCs from 4.1.185 to 4.2.207. I had 26 APs (all 1131 a/b/g) associated to WLCs.
After ugprade all but two 1131s have re-associated and received firmware updates. The two that did not associate are connected to the switch (port up/up) and I can see the mac-addresses. I can also see them as cdp neighbors with correct ap names. So it seems they do still have some config on them. However, they are not getting an IP address from the DHCP server and as such are not associating to the WLCS.
I have rebooted them twice to no avail. The round circle LED is solid green.
Scratching my head here. Any advice is appreciated. Anyone come across this problem before performing upgrades?