We have one 4402 and one WiSM in a 6513. I have been using the 4402 controllers internal DHCP to assign IP addresses to the APs. The other day we rebooted the 4402 running DHCP and started getting IP conflicts on the APs. Seems like after the reboot the internal DHCP didn't know what AP had what addresses. In time things settled back in.
Since then I have been thinking about switching to static IPs on the APs. I was going to leave a small pool just to prime the APs out of the box then give them static IPs. Should I be running more then one DHCP server and break up the AP subnets if I wanted a more stable DHCP enviroment?