Protection switching method and equipment thereof

Abstract

The invention discloses a protection switching method and equipment thereof. The method is used for PE in MPLS L3VPN, the PE is provided with a primary path and a standby path about a called route, and a forwarding table of the PE is previously memorized with a primary inner layer mark corresponding to the primary path and a standby inner layer mark corresponding to the standby path. The method comprises the steps of: when occurring path switching, obtaining the switched path attribute and a corresponding outer layer mark, wherein the path attribute comprises the primary path or the standby path; obtaining the corresponding inner layer mark according to the switched path attribute in the forwarding table; and enveloping and transmitting a report with the obtained outer layer mark and the inner network mark. The invention realizes the fast switching of the inner layer mark and an outer network mark of the path when switching the primary path with the standby path.

Description

technical field [0001] The invention relates to the communication field, in particular to a protection switching method and equipment. Background technique [0002] MPLS (Multi-Protocol Label Switch, Multi-Protocol Label Switching) VPN (Virtual Private Network, virtual private network) is a PE (ProviderEdge, service provider edge router)-based L3VPN (Layer3 VPN, three-layer VPN) technology, which uses BGP (Border Gateway Protocol, Border Gateway Protocol) to advertise VPN routes in the service provider's backbone network, and uses MPLS to forward VPN packets on the service provider's backbone network. The BGP / MPLS VPN networking method is flexible, has good scalability, and can easily support MPLS QoS (Quality of Service, service quality) and MPLS TE (Traffic Engineering, traffic engineering), so it has been applied more and more. [0003] A schematic diagram of a typical BGP / MPLS VPN networking solution in the prior art is as follows figure 1 shown, including: [0004] S...

AI Technical Summary

Problems solved by technology

[0022] The problem in the prior art is that each route or each CE has a main inner layer label and a backup inner layer label; in the case of a large number of VPNs and a large number of CE sites, such as thousands of CE sites In this case, when the primary path and the standby path are switched, the internal labels and external network labels of thousands of paths need to be switched.

Therefore, it is difficult to meet the requirements of fast recovery from failures in some applications

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