This notification-only value, an integer from 0 to 10, reports the specific reason a CUSP client instance was disconnected from a controller, such as Hello packet timeout, VRF service disabled, or resource request failure. Admins read this trap variable to diagnose client-side CUSP disconnects, which use a distinct reason-code set from the server-side reasons. For example, this object reporting value 7, "VRF service disabled", tells an admin the disconnect was caused by the VRF instance being administratively disabled rather than a network fault.