Method for end to end service rapid convergence and route device

Abstract

The invention relates to a method for quickly contracting the end-to-end service, and a relative route device, wherein said invention is characterized in that: PE of remote CE sets at least two tunnel transfer route information whose start node as the PE of remote CE and end node as the PE connected to remote CE, to check the state of tunnel, and the PE of remote CE based on checked tunnel state, presets the transfer route information of said tunnel to transfer service. The PE of remote CE can directly based on the transfer route information of backup tunnel, transfer service, when the tunnel is unavailable, to improve the contract speed and improve the service reliability.

Description

technical field [0001] The invention relates to the technical field of network communication, in particular to a method and routing equipment for fast convergence of end-to-end services. Background technique [0002] At present, with the rapid development of the network, the demand for triple play is becoming increasingly urgent. Operators attach great importance to the speed of service convergence when the network fails. When any node fails, the service switching of adjacent nodes is less than 50ms, end-to-end Service convergence of less than 1s has gradually become a threshold-level indicator for bearer networks. [0003] In order to meet the requirements of less than 50ms for adjacent node service switching and less than 1s for end-to-end service convergence, MPLS TEFRR (Multiprotocol Label Switching Traffic Engineering Fast Rerouting) technology and IGP (Intra-Domain Gateway Protocol) route fast convergence technology came into being. [0004] Under the network model of...

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Problems solved by technology

[0014] Before PE-E re-delivers the route advertised by PE-B to the corresponding forwarding entry, because the end point of the outer LSP tunnel pointed to by the forwarding engine of PE-E is always PE-A, and PE-A fails, Therefore, during the period between PE-A node failure and PE-E re-delivering the route published by PE-B to the corresponding forwarding item, CE-B cannot access CE-A, and the end-to-end service is interrupted.

[0015] When the PE device of the termination node PE-B fails, the time for service to resume normal transmission mainly depends on the time for service convergence, and the time for service convergence is closely related to the number of MPLS VPN internal routes and the number of hops in the bearer network. In a typical network In general, the service convergence time is about 5s, which cannot meet the requirement of less than 1s for end-to-end service convergence, and the end-to-end service convergence time will increase significantly with the increase of the number of private network routes carried by the MPLS VPN network.

[0016] Therefore, under the CE dual-homing PE network model, the current MPLS TE FRR technology cannot solve the problem of rapid end-to-end service convergence when the tunnel termination node fails

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