Fault processing method and device for a main path link

Abstract

The invention discloses a main path link failure processing method and device, which are applied in the MPLS VPN network environment. The present invention associates the sessions on both sides of the active target PE device on the active target PE device, and when the session path on the active target PE device side fails, it notifies all sessions associated with it to go down, thereby quickly Complete the switchover from the primary path to the standby path. Through the present invention, the operator network can quickly perceive the network failure on the user side, and switch to the backup path in time, so as to minimize packet loss, provide users with a better experience, and improve the operator network. quality of service.

Description

technical field [0001] The present invention relates to the technical field of network communication, in particular to a method and device for processing main path link failures. Background technique [0002] With the development of network technology, VPN (Virtual Private Network) is more and more popular, and MPLS (Multiprotocol Label Switching, multi-protocol label switching) VPN is a One of the rapidly developing VPN technologies at present. However, in the process of forwarding VPN packets, due to the unreliability of the network, any node or link failure will lead to service interruption. In order to improve the reliability of the network, path redundancy protection is often used. In order to meet the requirements of adjacent node service switching within 50ms and end-to-end service convergence within 1s, MPLS TE (Traffic Engineering, traffic engineering) technology, FRR (Fast ReRute, fast rerouting) technology, IGP (Interior Gateway Protocol, internal gateway protoc...

AI Technical Summary

Problems solved by technology

However, there is a serious defect in this path switching: when a failure occurs between CE1 and PE1, for example, a port failure, BGP between CE1 and PE1 will quickly perceive and revoke the BGP private network route, so that the route originally allocated on PE1 The VPN private network label will not exist, and the speed at which the remote PE3 perceives BGP and revokes the route is much slower, so that PE3 still carries the private network label issued by PE1 through BGP and forwards the packet along the main path. When it reaches PE1, PE1 cannot terminate the label because it has revoked the corresponding VPN private network label, which eventually leads to packet loss.

Images