hpicfDot1xAuthSessionStopTime 1.3.6.1.4.1.11.2.14.11.5.1.25.1.2.5.1.10

This object contains the value of sysUpTime at the time an authenticated Supplicant was de-authenticated, as a result of an EAPOL-Logoff, reauthentication period expiration, or forced asynchronous reauthentication.