METHOD AND ROUTER FOR FAST RE-ROUTE

摘要

A method and a router for fast re-route are provided by the embodiment of the invention. The method of the invention embodiment includes the following steps: the primary IP route, which is built between the local network provider edge router PE and the client edge router CE, and the corresponding alternate virtual private network VPN route are forwarded to the route forwarding table of PE; the link fault between the PE and the CE is detected by bidirectional forwarding detection BFD; when the link fault corresponded to the primary IP route is detected, the flow to the CE is all switched to the alternate VPN route to forward. The local PE-CE link failure can be rapidly detected by the application of the method of the invention embodiment, and the main network IP route and the alternate virtual private network VPN route are forwarded to the route forwarding table of network provider edge router PE, when the fault of the local PE-CE link has been rapidly detected, which is helpful to implement fast convergence of VPN operation and satisfy the real-time operation requirement of the users.