Method for checking flow engineering link time slot state consistency

Abstract

Present invention relates to a flow rate engineering link time slot state consistency check method. It contains A, transmitting end transmitting time slot state check request message contain relevant flow rate engineering link local side time slot state object to receiving end; B, receiving end receiving said message, comparing and checking relevant flow rate engineering link transmitting end time slot state object with local side time slot state object, notifying check result and opposite terminal time slot state object to local side link explorer to make process. The present invention can make regular detection to flow rate engineering link time slot state consistency, in time finding inconsistency abnormal situation, enhancing automatic exchange optical network connection viability.

Description

technical field [0001] The invention relates to network transmission technology, in particular to a method for checking consistency of time slot state of traffic engineering links. Background technique [0002] ASON network (automatically switched optical network) has the function of automatic discovery of network control topology and resource topology. On this basis, it can realize automatic creation and Rerouting automatically recovers in case of failure. [0003] Among them, the automatic discovery of resource topology is the key premise, which involves the discovery and information flooding of local TE links (traffic engineering links) and data links. The specific steps are as follows: [0004] 1. Discover the local optical port, establish the corresponding control channel and maintain it; [0005] 2. Carry out link management such as data link connectivity verification and TE link consistency verification, usually using the LMP protocol (Link Management Protocol) for...

AI Technical Summary

Problems solved by technology

[0012] (1) Users manually configure traditional static cross-connects on a single node through the network management system according to their own needs, but only some time slots at one end of the link are occupied by the configuration, such as figure 1 As shown, in the TE link, the EMS (network management) has configured the time slot resources of the A side as occupied, but the time slots of the B side are still idle, so the status of the time slots at both ends of the TE link is inconsistent

[0013] (2) In the process of deleting an LSP, due to the abnormal reset of a network element node and other reasons, the deletion cannot be successful, causing some network element nodes, usually upstream nodes, the corresponding cross-connection has been deleted, that is, the corresponding TE link time slot resources have been released , but for other network element nodes, usually downstream nodes, the corresponding crossover is still left, that is, the corresponding TE link time slot resource is still occupied, therefore, causing an abnormal reset of the link time slot status between the network element node and its adjacent nodes inconsistent

[0018] The above method requires each node in the network to flood all the TE link time slot status information of the node in the entire network through the OSPF-TE protocol, which greatly increases the amount of communication data. Because the OSPF-TE protocol flood refresh may There is a problem of not being timely. In order to avoid false checks, multiple consecutive checks must be performed for confirmation, which leads to untimely detection and processing, which easily delays the establishment of LSPs and the recovery of rerouting, resulting in waste of TE link time slot resources.

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