Understanding Session Termination Causes and RADIUS Termination Cause Codes
Code Value Termination Cause Description
1 User Request = User initiated the disconnect (logout).
2 Lost Carrier = DCD was dropped on the port.
3 Lost Service = Service can no longer be provided; for example, the user’s connection to a host was interrupted.
4 Idle Timeout Idle = timer expired.
5 Session Timeout = Subscriber reached the maximum continuous time allowed for the service or session.
6 Admin Reset = System administrator reset the port or session.
7 Admin Reboot = System administrator terminated the session on the NAS; for example, prior to rebooting the NAS.
8 Port Error = NAS detected an error on the port that required ending the session.
9 NAS Error = NAS detected an error (other than on the port) that required ending the session.
10 NAS Request = NAS ended the session for a non-error reason.
11 NAS Reboot = NAS ended the session due to a non-administrative reboot.
12 Port Unneeded = NAS ended the session because the resource usage fell below the low threshold; for example, the bandwidth-on-demand algorithm determined that the port was no longer needed.
13 Port Preempted = NAS ended the session to allocate the port to a higher-priority use.
14 Port Suspended = NAS ended the session to suspend a virtual session.
15 Service Unavailable = NAS was unable to provide the requested service.
16 Callback = NAS is terminating the current session in order to perform callback for a new session.
17 User Error = Error in the user input caused the session to be terminated.
18 Host Request = Login host terminated the session normally.