The NetScaler appliance RADIUS monitor periodically checks the state of the RADIUS service to which it is bound by sending an authentication request to the service. The RADIUS server authenticates the RADIUS monitor and sends a response. By default, the monitor expects to receive a response code of 2, the default Access-Accept response, from the RADIUS server. As long as the monitor receives the appropriate response, it marks the service UP.
Note: RADIUS monitor supports only PAP type authentication.
To monitor a RADIUS service, you must configure the RADIUS server to which it is bound as follows:
To configure built-in monitors to check the state of RADIUS server, see Configuring Monitors in a Load Balancing Setup.