RADIUS service tracking
RADIUS service tracking determines the availability of RADIUS servers configured on the switch. RADIUS service tracking minimizes the wait time for clients when authentication has failed and they are placed in the unauth-vid (Guest VLAN). The wait time for both unauthenticated clients and previously authenticated clients is reduced when RADIUS service tracking is enabled.
This feature is disabled by default. For more information, see the Switch Access Security Guide for your switch.