Virtual private network (VPN)-instance-based inter-equipment backup method, equipment and system

Abstract

The embodiment of the invention provides a virtual private network (VPN)-instance-based inter-equipment backup method, VPN-instance-based inter-equipment backup equipment and a VPN-instance-based inter-equipment backup system. In the method, inter-equipment main / standby relationships between provider edges (PE) on the same side of a network are determined for each specific VPN instance, thereby realizing the main / standby relationships between the PEs by taking the VPN instance as a unit. Simultaneously, by the method provided by the embodiment of the invention, when a main PE of a certain VPN instance fails, the main PE and a standby PE for the VPN instance can be reset for the VPN instance according to VPN parameters of the VPN instance on the original main PE and the original standby PE, thereby transmitting the data of the VPN instance to a network receiving side by the new main PE or receiving the data of the VPN instance from a network transmitting side by utilizing the new PE to avoid the production of circuity between the main and standby PEs and greatly save network resources.

Description

technical field [0001] The present invention relates to the technical field of communications, in particular to a method, device and system for backup between devices based on a VPN instance. Background technique [0002] A virtual private network (VPN, Virtual Private Network) refers to a virtual private network provided by the public network to customers. Using the public network to establish a private network can bring users a carrier-class network with high performance and low investment. However, traditional VPNs cannot fully implement VPN scalability, security, management and maintenance, QoS assurance, and traffic engineering. Meet customer needs. [0003] In order to solve the above problems, the prior art adopts a VPN based on Multi-Protocol Label Switching (MPLS). It not only improves the defects of traditional IP network, frame relay and ATM network, but also has the advantages of information transmission security, real-time performance, broadband, convenience a...

AI Technical Summary

Problems solved by technology

[0010] The inventor found through research on the prior art that each PE device can access multiple VPN instances of the CE device, and multiple VPNs can share one PW. When the PW fails, the data flow needs to pass through the main PE device. Only the AC interface can reach the backup PE device, which wastes the bandwidth between the active and standby PE devices, and the existing solutions cannot solve the protection between PE devices based on a single VPN instance.

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