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|1. (WO2018040614) METHOD, RELATED DEVICE, AND SYSTEM FOR ESTABLISHING LABEL-SWITCHED PATH FOR VIRTUAL PRIVATE NETWORK|
|Applicants:||HUAWEI TECHNOLOGIES CO., LTD.
|Title:||METHOD, RELATED DEVICE, AND SYSTEM FOR ESTABLISHING LABEL-SWITCHED PATH FOR VIRTUAL PRIVATE NETWORK|
Embodiments of the present invention provide a method, a related device, and a system for establishing an LSP for a VPN. The method comprises: a first PE device receiving protection information transmitted by a second PE device, the protection information comprising a virtual next hop (vNH); and the first PE device transmitting a VPN LSP establishment message to the second PE device, the VPN LSP establishment message being configured to indicate that an LSP for a VPN is established with the vNH as an end point. In the above technical solution, the first PE device is an egress PE device for the LSP for the VPN, and the second PE device is an ingress PE device for the LSP for the VPN. According to the above technical solution, the egress PE device can establish, according to the vNH transmitted by the ingress PE device, the LSP for the VPN, avoiding excessive configuration of the egress PE to establish the LSP for the VPN.