Hello
I hope that helps you.
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Configuring Access Points or Routers to Use the Local Authentication Server
If your local authentication server access point also serves client devices, you must configure the local authentication server to use itself to authenticate client devices.
On the wireless devices that use the local authentication server, use the radius-server host command in privileged EXEC mode to enter the local authentication server as a RADIUS server. The order in which the devices attempt to use the servers matches the order in which you enter the servers in the device configuration. If you are configuring the device to use a RADIUS server for the first time, enter the main RADIUS servers first, and enter the local authentication server last.
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Source:
http://www.cisco.com/en/US/docs/ios/12_3t/12_3t11/feature/guide/locauth.html#wp1044680
best regards,
Sebastian