Method and system for protecting looped network

Abstract

In order to realize the protection more simply and be capable of carrying out service recovery and protection rapidly and be capable of realizing protection and recovery of P2P and P2MP services on a looped network, the invention provides a method for protecting the looped network on the basis of local fault detection, which comprises the following steps of: when one node detects that a local link or node goes wrong, generating a fault message by the node, and sending the fault message to other nodes on the looped network; sending services by a source node through a working path ad a protecting path; and receiving by a destination node through the working path or the protecting path, wherein the direction of the working path is opposite to the direction of the protecting path. In addition, the invention also provides a system for protecting the looped network on the basis of local fault detection.

Description

technical field [0001] The present invention relates to the field of ring network protection, in particular to a ring network protection method and system based on local fault detection. Background technique [0002] For the existing services on the ring network, whether it is a P2P service or a P2MP service, there are many protection methods. There are mainly the following types: [0003] 1. The FRR bypass protection method of RFC 4090, although it is relatively simple and fast to implement, but a layer of Tunnel label is pressed on top of the original message, which brings a large byte overhead and transmission distance. And when a node or multiple failures occur at the same time, the protection and recovery of services cannot be performed. [0004] 2. The FRR detour protection method of RFC 4090, although it does not need to be protected through tunnels like the previous protection method, each LSP on each node is configured with a protection path. For each node, its LS...

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Problems solved by technology

[0003] 1. The FRR bypass protection method of RFC 4090, although it is relatively simple and fast to implement, but a layer of Tunnel label is pressed on top of the original message, which brings a large byte overhead and transmission distance. And when there is a node or multiple failures at the same time, the protection and recovery of the business cannot be carried out

[0004] 2. The FRR detour protection method of RFC 4090, although it does not need to be protected through tunnels like the previous protection method, each LSP on each node is configured with a protection path. For each node, its LSP The maintenance and configuration workload is relatively large;

[0005] 3. The WRAPPING protection method in the G.8132T-MPLS ring network protection standard, on the one hand, due to the use of local fault recovery mode, the transmission distance of the protection path is relatively large, which brings large delay and overhead; on the other hand, each node needs to Bind the working label and protection label for each LSP on the Internet, and the maintenance workload is relatively large;

[0006] 4. The Steering protection method in the G.8132T-MPLS ring network protection standard, although compared with wrapping protection, due to the protection of services at the source end, the protection path is relatively short, and the overhead and delay are small, but it cannot be realized Complete protection of P2MP services on the ring network;

[0007] Based on the above ring network protection methods, on the one hand, some protection methods are complicated to implement and the protection speed is slow; on the other hand, some protection methods cannot fully protect all services

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