Ethernet Ring Protection Using Filtering Database Flip Scheme For Minimum Capacity Requirement

Abstract

Ethernet ring protection is a new technology introduced in ITU-T Recommendation G8032, which utilizes the genetic Ethernet MA C functions. We introduce an alternative enhanced protection switching scheme to suppress penalty in the switching transient, in which the Ethernet MAC filtering database (FDB) is actively and directly modified by information disseminated from the nodes adjacent to failure. The modified FDB at all nodes are guaranteed to be consistent to form a complete new ring network topology immediately This scheme can reduce the capacity requirement of the G8032 by several times. This proposed scheme can be also applied in IP protection rings.