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Protecting method and device for rapid reroute

A routing and fast technology, applied in the field of communication, can solve problems such as loopless backup path selection defects, and achieve the effect of perfect implementation mechanism and strong backup capability

Inactive Publication Date: 2010-05-19
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] In view of the above analysis, the present invention aims to provide a fast rerouting protection method and device to solve the problem of acyclic backup path selection defect in the specific networking situation existing in the prior art

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  • Protecting method and device for rapid reroute
  • Protecting method and device for rapid reroute
  • Protecting method and device for rapid reroute

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Embodiment Construction

[0049] The purpose of the present invention is to provide a fast rerouting protection method and device. By adding a fast rerouting acyclic backup path protection type-pseudo-node protection, it makes up for the current fast rerouting in a specific network. The defect in the selection of the ring backup path makes the backup capability of the selected acyclic backup path more powerful, improves the implementation mechanism of fast rerouting, and provides technical guarantee for the rapid recovery and convergence of the network.

[0050] Preferred embodiments of the present invention will be specifically described below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of the application and are used together with the embodiments of the present invention to explain the principles of the present invention. For the sake of clarity and simplicity, detailed descriptions of known functions and constructions in the devices described her...

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Abstract

The invention discloses a protecting method and a device for rapid reroute. The method comprises the following steps of: judging loop-free backup paths with node protective capability, dummy node protective capability or basic link protective capability from all backup paths by a source node; and selecting an optimal ring-free backup path of the optimal path from the loop-free backup paths with node protective capability, dummy node protective capability or basic link protective capability according to the priority principle that the node protection is superior to the dummy node protection which is superior to the link protection. The invention makes up the selection defect of the current rapid reroute to the loop-free backup path under specific networking, ensures that the backup capability of the selected loop-free backup path is stronger, completes the realization mechanism of rapid reroute and provides technical guarantee for rapid recover and constringency of network.

Description

technical field [0001] The invention relates to the technical field of communications, in particular to a fast rerouting protection method and device. Background technique [0002] At present, the protection types of the loop-free backup paths (Loop-free Alternates) of the rapid rerouting (IPFRR) mainly include two types, one is link protection, and the other is node protection. [0003] For link protection, the calculated loop-free backup path can only protect the current optimal primary next-hop link, but cannot protect the optimal primary next-hop neighbor nodes. When only the primary next-hop link fails, the next When the hop neighbor node is still running normally, the backup route can perform backup and forwarding normally; when the primary next-hop neighbor node fails, the backup path of the link protection cannot perform the backup function correctly, and the backup path itself cannot be used for actual forwarding. [0004] For node protection, the calculated loop-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/56H04L12/24H04L45/28
Inventor 王会来武亚青
Owner ZTE CORP
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