Method and system for elastic packet ring network node to perform working mode switch

Abstract

The invention provides a working mode switching method and a system for resilient packet ring (RPR) network nodes. The method mainly comprises when PRP network node or link circuit failure is recovered, and after a first RPR node affected by the failure recovery switches the working mode thereof to normal, the first RPR node performs temporary ring selection treatment and transmits an upper ring message out from a non-failure recovery ring; and after the first RPR finishes the temporary ring selection treatment, a second RPR node affected by the failure recovery and in the vicinity of the first RPR switches the working mode thereof to normal. By the invention, after the single-node failure is recovered, and when the node is switching the working mode, the RPR ring-operated network can guarantee the message not to lose during the transmission process between the upper ring node and two rings.

Description

technical field [0001] The present invention relates to the field of network communication, in particular to a method and system for switching working modes of RPR (Resilient Packet Ring, Resilient Packet Ring) network nodes. Background technique [0002] RPR technology is a two-layer ring network technology, which provides a good networking solution for broadband IP metropolitan area network operators. Compared with traditional Ethernet, one of the main features of RPR is that it has carrier-class reliability. This feature enables RPR to handle not only data-oriented service transmission requirements, but also multi-service transmission requirements. [0003] By effectively combining the carrier-grade features of SDH (Synchronous Digital Hierarchy) with the data-oriented high-bandwidth distribution, flexibility and scalability of Ethernet, RPR provides data-optimized bandwidth based on ring topology Management, cost-effective multi-service transmission solution, can be use...

AI Technical Summary

Problems solved by technology

[0020] Case 2. The westbound working mode is wrap. If the message is sent to node D, the message will be looped from ring 0 to ring 1 at node C, and the forwarding path of the message is B->C->B- >A->F->E->D, because the ring ID is incorrect, the message will not go off the ring, continue to forward, and forward to node C. At this time, the working mode of node C has the following situations: i, eastbound Both normal and westbound, the message will always go round in the wrong ring direction and cannot be stripped, or the TTL (Time To Live, time to live) timeout and stripped, but due to the wrong ring direction, node D cannot receive the message; ii . If the eastbound working mode of node C is wrap, the message will be looped from ring 1 to ring 0, and then forwarded to node D, and then at node D, the message will be delinked from ring 0; iii. Node C works eastward If the mode is normal and the west direction is wrap, the packet will be discarded on the MATE port of node C;

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