This value, in seconds, sets the reAuthPeriod timer that governs how often the Reauthentication Timer state machine forces an already-authenticated 802.1X client to re-authenticate. Periodic reauthentication lets the switch revalidate a client's credentials and detect a session that should no longer be trusted, without requiring the client to physically reconnect. At the default of 3600 seconds, a logged-in user's session is silently re-checked against the RADIUS server every hour while they keep working.