Ring network protection method, network node and ring network

摘要

A ring network protection method, a network node and a ring network are provided. The ring network protection method includes: sending, by a first node, a protection switching request message on a link protection tunnel of a link between the first node and a second node, and a node protection tunnel of the second node when a fault occurs in a ring network; receiving a protection switching response message on the link protection tunnel of the link between the first node and the second node, or the node protection tunnel of the second node; and switching services to the protection tunnel where the protection switching request message is received.