Error "5440 Endpoint abandoned EAP session and started new"

[Aydin Karimzadehasl]

Hello dear community

We have problem in one of our sites which when the new users (both Mac devices and Windows devices) trying to connect to the WI-FI network they cannot connect or sometimes they disconnect from the WI-FI network and the reconnection proccess will be unsuccessful.

We have Cisco ISE 2.4 and the users authenticate themselves when they trying to connect to access points. for the users who cannot connect,when we look for the logs we face with "5440 Endpoint abandoned EAP session and started new" error.

more details are shown in the screenshots which attached.

[Oleg Pekar]

Dear Aydin,

Looking on the authentication details steps we can see that the supplicant stopped responding to ISE after ISE sent him the first message of EAP-MSCHAPv2 PEAP inner method. Usually this happens when the supplicant lacks something required to conduct this inner method. For example, EAP-MSCHAPv2 inner method is not configured for PEAP or disabled at all, or the supplicant doesn't have a username or password configured that are required by EAP-MSCHAPv2 protocol. Please check the configuration on the supplicant and get back here so we can continue troubleshooting.