A rerouting method, system and network equipment

Abstract

The invention discloses a rerouting method, system and network equipment. The rerouting method includes: the network equipment receives a preset rerouting query message sent by a source node of a service, including fault entity information, service identification and a first preset Rerouting path information; determine the non-faulty path of the service according to the information of the faulty entity and the identification of the service; determine that the first preset rerouting path is not completely separated from the non-faulty path of the service, then query the preset route of the service corresponding to the faulty entity Table, obtain the second preset rerouting path that does not pass through the faulty entity and has the least overlapping entity with the non-faulty path of the service; determine that it is different from the first preset rerouting path, and send the first response to the source node of the service News, through the above disclosure, the present invention can realize the establishment of a preset rerouting path completely separated from the non-failure path under any two-connected physical topology of the ASON network, ensuring 50ms switching resistance against two failures, and ensuring high reliability of services.

Description

technical field [0001] The present invention relates to the communication field, in particular to a rerouting method, system and network equipment. Background technique [0002] The survivability of ASON (Automatically Switched Optical Network, Automatically Switched Optical Network) can be divided into protection and recovery according to whether the resources are dedicated. Switching to the protection path within 50ms can meet the requirements of carrier-class reliability. However, in reality, there are 1+1 services with higher reliability requirements (such as stock market and bank leased lines and other communication services), they not only require that the first failure can be switched within 50ms, but also require that the second failure of the network still be guaranteed within 50ms Recovery, which puts higher demands on the network and protocols. [0003] If there are two completely separated paths between any two nodes in the network topology, this network topolo...

AI Technical Summary

Problems solved by technology

However, the actual customer network physical topology is generally difficult to meet the requirements of complete three-connectivity against secondary failures. In this case, when the restoration path is rerouted according to the pre-calculated The rerouting path is not associated with a specific failure scenario. When a failure occurs, an available preset rerouting path is selected. This preset rerouting path may overlap with the existing path (unfaulted working path or protection path). Therefore, when the second fault occurs, the preset rerouting path and the existing path may be interrupted at the same time, so that the service cannot guarantee 50ms switching after the second fault

[0004] Therefore, when the available network resources are insufficient or the physical topology is not satisfied, the existing technology cannot establish a preset rerouting path connection that is completely separated from the existing path, so that it cannot guarantee the anti-secondary fault switching within 50ms of the service and guarantee the service high reliability requirements

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