Research and Implementation on Path Protection and Restoration Algorithms in Ethernet Ring Networks
Currently, more than 90 percent of Internet Traffic is originated from Ethernet-based LAN. But native Ethernet protocols couldn't be extended into MAN because it lacks of OAM features, such as sub-50ms protection. This paper presents a Lightweight Distributed Ethernet Protection Algorithm-LDEPA. Different from Spanning Tree Protocol (STP) and other Ethernet protection schemes, this algorithm has the ability of sub-50ms protection provisioning and scalability. This paper also describes an implementation of LDEPA on NPU-based switched router.