CONNECTIVITY FAULT NOTIFICATION

摘要

Connectivity fault notification is provided by generating an alarm indication signal at a node that is logically adjacent to the fault, and forwarding the alarm indication signal toward client level entities associated with at least one virtual connection affected by the fault. The alarm indication signal may be suppressed at any level for a service instance if service is restored at that level, or if a protection path prevents disruption of the service instance at that level, or auto-suppressed at an originating node based on number of times transmitted or elapsed time. Further, the alarm indication signal may be employed to trigger use of the protection path.