Ethernet ring network three-layer route forwarding fast switching method

Abstract

The present invention discloses a method for a fast switching forwarded by an Ethernet ring network tri-level routing, a behavior identifier used to identify a tri-level routing service forward is increased at the ring network port of an Ethernet ring network node, and the survival time is set for the behavior identifier, when the Ethernet ring network works normally, the behavior identifier only is existent, but, any action is not done; once the Ethernet ring network fails or the ring network recoveries, the behavior identifier is activated to finish the work: the tri-level routing service forwarded by the ring network port of the node replicates and forwards a copy from the other ring network port of the node. The behavior identifier is aged after the information is established newly under the tri-level routing service, after the behavior identifier is aged, the behavior is withdrawn and only the identifier is reserved; when the behavior identifier is within the survival time, if the ring network shocks, the survival time is re-configured, to avoid the shock caused by the behavior identifier and the tri-level service forward, thereby to ensure that the tri-level routing service in the Ethernet ring network can meet the requirement of the fast switching within 50 ms.

Description

technical field [0001] The invention relates to a failover protection technology of an Ethernet ring network, in particular to a method for fast switching of an Ethernet ring network supporting three-layer routing services. Background technique [0002] As a kind of Ethernet technology applied to broadband metropolitan area network, Ethernet ring network has been more and more widely used at present. It solves the problem of weak protection capability, large delay and long fault recovery time of traditional Ethernet-based metropolitan area systems. and other issues; the Ethernet ring network can also provide 50ms-level fast protection features, improve service quality and network reliability, and because it is compatible with traditional Ethernet protocols, it has become an important network for metropolitan broadband access to the convergence layer. technology choices. [0003] In the existing Ethernet ring network mode, services carried in the Ethernet ring network are ge...

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Problems solved by technology

[0010] In the recovery process of the above-mentioned link failure, the Ethernet ring network protocol has recovered within 50ms, but the re-establishment of the next-hop information of the layer-3 routing service of node S4 must rely on ARP analysis to complete, and the ARP analysis process takes The time is in the range of seconds, which is far beyond the 50ms control level of the ring network itself, so the reliability and quality of service of the three-layer routing business cannot be guaranteed

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