What is the difference between IETF session-timout attribute, and Aironet

[matthewsj]

What is the difference between the IETF session timeout value and the aironet session timeout value? I have all cisco access points with mixed clients. Do I need to enable the IETF timeout in addition to the aironet session timeout to force a new session key? I only want to timeout wireless sessions.

[thomas.chen]

IETF attribute is used by aironet AP as the encryption key timeout. After this timer timeouts new key is negotiated between AP and

client. The VSA is user authentication timeout. after this timer timeouts, the user has to authenticate again.