A REROUTING METHOD IN THE MULTI-PROTOCOL LABEL SWITCH NETWORK

摘要

A rerouting method in the multi-protocol label switch MPLS network comprises, A, operate the label distribution protocol within the network, and each router in the network records the FEC-label mapping information received from all the ports, and generates the respective label forwarding information based on each FEC-label mapping information; B, the router configures the protected port, and specifies the backup port for the route corresponding to each FEC that considers this port as the next hop; for the route corresponding to one of the FECs, the protected port is the main port; C, the router generates the local label forwarding table based on the main label forwarding information and the backup :Label forwarding information; D, during the data transmission, if the router detects the fault of the main port, the data is routed directly to the backup port to continue the data transmission according to the backup forwarding information in the label local label forwarding table. The usage of the invention can save the time for rerouting, and has small device overhead, and this invention also can be achieved locally, and has well compatibility.