Let's start from the bottom up
Im assuming you have static IP address on the APs, AND the management IP address of the AP is on the same subnet as your WLC
1. Check if your AP is using an LWAPP image
-The best way to check is to simply do 'show capwap ip config' if it accepts that command then your AP is for sure using LWAPP
2. Verify if the port on the switch has good connectivity
-First, remove the AP connection to the switch, assign your laptop for example the same ip address, connect your computer to the SAME port on the switch, then ping the IP address of the WLC
If you can ping that, then awesome
2. Verify if you still have enough licenses on your WLC
-It is actually can be found on the dashboard, but for further details go to:
AT: Management Tab
CLICK: Software Activation
AT: Licenses -License Info/Status
AT: License Usage -APs Left/APs used
Let's start from here
