Clients losing connectivity DOT1X-3-INVALID_WPA_KEY_MSG_STATE: 1x_eapkey.c:1002 Received invalid EAPOL-key M2 msg in START state - invalid secure bit; KeyLen 40, Key type 1, client 94:65:9c:6b:f2:42

[scottbreslin]

We are having issues with our WLC where users are being disconnected for a period of time, the stay connected to the controller but get disconnected from the network if that makes sense.

Error that we suspect is causing the problem

*Dot1x_NW_MsgTask_2: Apr 25 09:19:24.029: %DOT1X-3-INVALID_WPA_KEY_MSG_STATE: 1x_eapkey.c:1002 Received invalid EAPOL-key M2 msg in START  state - invalid secure bit; KeyLen 40, Key type 1, client 94:65:9c:6b:f2:42

Can anyone please shed any light on what this error message relates to and also any possible courses of action

[mohanak]

Error Message    %DOT1X-3-INVALID_WPA_KEY_MSG_STATE: Received invalid [chars] msg in 
[chars] state - [chars]; len [int], key type [int], client 
[hex]:[hex]:[hex]:[hex]:[hex]:[hex]

Explanation    Client authentication failed because of an authentication protocol error between the client and access point.

Recommended Action    If the problem persists, try upgrading the client driver software or using different client software to isolate the cause. Also investigate possible intruder activity.