I am trying to setup WLC 4402 and AP's AIR-LAP1131AG-E-K9 in our production enviornment but unfortuantely facing few issues.
Network dhcp server is configured with option 043 to facilitate AP's and Wireless devices to get an IP from dhcp server, I can see the AP's receievd IP's from dhcp server but still I can't see them on WLC. I have checked that on AP's and it looks like to me that the joining process was keep reseting and access points re-initiating the process, I have checked no other devices on the network have same IP and there's no IP conflict. Then I cofigured AP manually and assigned IP, Controller IP and Default gateway but still no Luck.
Please find attached network diagram and error files, AP's can ping all other network devices and all other devices can ping AP's.
The issue is AP's are unable to join WLC.