AP 1252 in autonomous mode not sending framed-ip-address

Question

I was attempting to use the Websense RADIUS Agent to transparently map wireless users in it's database. This is done by passing the RADIUS accounting packets through the websense server where Websense can read them and map the username and password. This works for our Cisco VPN clients and Anyconnect clients. The problem I have is that the 1252 AP does not send the framed-ip-address in the RADIUS accounting packet. The AP should know the client IP since it can be seen with "show dot11 association".
For whatever reason, the AP doesn't know the IP address. This is verified by enabling aaa acounting delay-start which delays the sending accounting packets until the peer IP is known. With this command in, no accounting packets are ever sent from the AP.
Does anyone know why the AP doesn't include the framed-ip-address in the accounting packets? Or, why the AP is not able to learn the peer IP address from the client association information?
Thanks,
Mark

Answer 1

For a session to be disconnected, the values in one or more of the key fields in the POD request must match the values for a session on one of the network access server ports. Which values must match depends on the auth-type attribute defined in the command. If noauth-type is specified, all four values must match. If no match is found, all connections remain intact and an error response is returned. The key fields are as follows:
User-Name
Framed-IP-Address
Session-Id
Server-Key