Method, system and device for recovering service

A system for recovering a service, the system comprising:

• a node apparatus and a network management device, wherein
• the network management device is configured to plan N band-level Forward Adjacency Label Switched Paths (FA LSPs) according to working resources of a TE link in a network, plan N band-level shared MESH recovery paths corresponding to the N band-level FALSPs, establish the N band-level FA LSPs on the working resources of the TE, link, and establish the N band-level shared MESH recovery paths corresponding to the N band-level FA LSPs on recovery resources of the other TE, links aside from the TE link in the network;
• wherein the N is an integer greater than or equal to 1, and the N is the number of all band-level shared MESH recovery paths corresponding to the TE link;
• the node apparatus is configured to flood information of a shared MESH recovery state which indicates a state of working resources included in each of the N band-level FA LSPs into the network, detect whether the TE link fails after the N band-level FA LSPs and the N band-level shared MESH recovery paths are established;
• and recover a service on the working resources of the TE, link by switching the N band-level FA LSPs on the TE link to the N band-level shared MESH recovery paths when detecting that the TE link fails;
• wherein the information of the shared MESH recovery state is used to broadcast that a failure recovery mode of the working resources of the N band-level FA LSPs is a band-level shared MESH recovery mode.