COMMUNICATION SYSTEM, COMMUNICATION APPARATUS, AND PROTECTION METHOD

摘要

A communication system includes two or more ring networks in which nodes are connected in a ring shape, carries out ERP for each of the ring networks, sets one of the ring networks as a major ring that detects a failure in a shared link, and sets the other ring networks as sub rings. A shared node, which terminates the shared link, includes: a failure monitoring unit that respectively detects, concerning two or more of the ring networks that share the shared link, failures in the ring networks; a switching processing unit that determines, on the basis of a detection result of the failures, the ring network set as the major ring; and ERP processing units that store, when the switching is performed by the switching processing unit, identification information after the switching in an R-APS frame and transfer or transmit the frame.

主权项

1: A communication system comprising two or more ring networks in which a plurality of communication apparatuses are connected in a ring shape,
the communication system
carrying out ring protection by blocking a single port as a blocked port for each of the ring networks and switching the blocked port to a failure occurrence port when a failure occurs,setting one of the ring networks as a major ring that detects a failure in a shared link, which is a transmission line shared among the ring networks, andsetting the ring network other than the major ring as sub ring that does not monitor for a failure, wherein a shared apparatus, which is the communication apparatus that terminates the shared link, includes: a failure monitoring unit that, for two or more of the ring networks that share the shared link, detects both failures in the ring networks and also detects a failure in the shared link; a switching processing unit that carries out switching of the major ring and the sub ring on the basis of a detection result of the failures detected by the failure monitoring unit; and a ring processing unit that notifies, when the switching is performed by the switching processing unit, the ring networks of information indicating the major ring after the switching.