Efficient ethernet multi-ring protection system

Ethernet ring protection (ERP) introduced by ITU-T G.8032 Recommendation is a new class of packet switched network protection technology that can provides ring automatic protection switch for nested multiple Ethernet rings. An ERP system is required to provide network protection against link and node failures within 50 ms. Whenever the protection scheme switches the ring to have a new topology, the standard requires all nodes to flush their filtering data base (FDB) resulting in congestion in the access networks. In this paper we evaluate the protection performance of the current G.8032 scheme and introduce additional novel schemes for performance enhancements in nested multiring networks.