Problems w/config AP1200 - WPA Enterprise/Local RADIUS Server

Question

I have been attempting to reconfigure a AP1200 in our lab environment from using static WEP keys to WPA/TKIP. I can make the solution work with WPA-PSK, but not enterprise. I believe I have everything configured correctly but cannot "validate identity" on the client. Below are the details to my configuration.
SSID: labssid (Open authentication with EAP)
Cipher: TKIP
Key management: Mandatory (WPA)
I have a Cisco ACS server but am attempting to get this running intially using the local RADIUS server on the Access Point. I have a user defined locally called "test" with a password of "test".
I am using an IBM ThinkPad T43 with the built-in wireless (Intel PRO/Wireless 2915ABG NIC) for testing. I have the "Use Windows to configure my wireless network settings" checked so I am using the inherant Windows configuration screens. However, I have also attempted to use the IBM NIC configuration utility and receive the same failures. I have the client device configured as follows:
1. Network authentication: WPA
2. Data encryption: TKIP
3. Authentication: Protected EAP (PEAP) (only option other than smartcard, cert.)
3a. (PROPERTIES) - AuthMethod: Secured Password (EAP-MSCHAP v2)
4. Authenticate as computer whe computer information is avail (UNCHECKED)
5. Authenticate as guest when user or computer is unavailable (UNCHECKED)
When I attempt to provide my test/test credientials the Access Point logs the following:
Station 0016.6f77.9ccd Authentication failed
When I look at the Local RADIUS server stats, for each authentication failure the following stat is recorded:
"Unknown EAP Type"
If I try to authenticate 5 times, there will be 5 Unknown EAP Type stats logged.
What am I missing?

Answer 1

I didn't realize the local RADIUS couldn't do PEAP. That makes sense now, as in testing I decided to point the AP at my ACS server and was able to authenticate. I'm having an issue authenticating at times because it seems the AP looses it's connection TO the ACS server. The Access Point logs the following:
1. Station 0016.6f77.9ccd Authentication failed
2. RADIUS server 192.168.102.82:1645,1646 has returned.
3. RADIUS server 192.168.102.82:1645,1646 is not responding.
The "not responding" and "returned" logs are recorded at the exact same time period. In my most recent case, it was "Aug 31 18:19:36.981". Both have that time stamp. It's as if the AP looses some heartbeat to the RADIUS server and doesn't check to see if it's alive until a certain interval. When I'm not able to authenticate, if I log into the ACS and manually "restart" the services through the GUI, I authenticate right away. I'm thinking this is an ACS issue not an AP issue, but am wondering if anyone else has ever noticed this behavior.