Re-routing method, system and network deivce

Abstract

The utility model discloses a re-routing method, a system and a network deivce. The rerouting system comprises that the network device receives the preset rounting inquery information transmitted by the business source node, wherein the inquery information comprises fault entity information, business identifiers and first prest rerouting path information; the unfaulted path of the business is identified according to the faut entity information and the business identifiers; the fact that the first preset rounting path is not completely disconnected from the unfaulted rounting path is determined, the preset routing table of the business corresponding to the faut entity is inqured to obtain the second preset rerounting path which has the least superposition entity with the unfaulted path; the difference with the first prest rerouting path is determined and the first answer information is transmitted to the business source node. The invention can realize the establishment of the preset rerouting path which is completely disconnected from the unfaulted path, the 50ms conversion of the secondary fault is guaranteed and the reliability of the business is guaranteed.

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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