I tried MAC address filtering on the AP. Regardless of whether it was turned on or not, it lets any client connect (with WPA2 credentials) with any MAC address. Additonally, its not handled at the main router either. I'll research further, but it doesn't seem to be working correctly.
One a different topic, when I use MAC address filtering on the AP, the AP apparently hands out new ip's than the ones that were designated from the main router. Odd.
Currently I have...
DHCP Server unchecked
DNS Relay unchecked
SPI unchecked
don't know what to do with NAT.
MAC Address Filters are the same on both units.
Anything else I should do?