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Rapid rerouting method for protecting local path

A local path and routing technology, applied in the field of network communication, can solve the problems of limited path range and long transmission time of fault notification messages, and achieve the effect of avoiding resource waste, reducing the number of backup tunnels, and saving backup bandwidth resources.

Active Publication Date: 2009-10-21
MAIPU COMM TECH CO LTD
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AI Technical Summary

Problems solved by technology

[0006] The present invention provides a fast rerouting method for partial path protection, which can avoid the excessively long transmission time of fault notification messages in existing path protection and the protection required in partial path protection For the problem of limited path range, it can implement fault protection between any node and link on the main LSP

Method used

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  • Rapid rerouting method for protecting local path
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  • Rapid rerouting method for protecting local path

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Embodiment Construction

[0033] The fast rerouting method of partial path protection of the present invention comprises the following steps:

[0034] a. A bypass LSP is established between nodes that need to deploy fast rerouting local paths on the main LSP;

[0035] b. Deploy fault detection on the outgoing interface of the local repair point and the incoming interface of the rendezvous point through which the main LSP passes;

[0036] c. After the local repair point detects a node or link failure in the local path, it switches the service flow to the bypass LSP for forwarding, and simultaneously sends a failure indication signal message to the head node of the main LSP;

[0037] d. The primary LSP head node attempts to establish a new primary LSP after receiving the failure indication signal message.

[0038] In the above-mentioned step b, the fault detection includes the following steps:

[0039] b1. The local repair point constructs a display routing object according to the interface address of ...

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Abstract

The invention discloses a rapid rerouting method for protecting a local path, which comprises the following step that: a bypass LSP is established among nodes of the local path of a main LSP needed to deploy rapid rerouting; an outgoing interface of a local restoration point and an incoming interface of a confluent point which a main tunnel passes through are deployed with fault detection; after the local restoration point detects a fault, service traffic is switched to the protective LSP for transmitting; simultaneously, a fault indication signal message is sent to a head node of the main tunnel; and the head node of the main tunnel receives the fault indication signal message and tries to establish a new main LSP. The method avoids the problems that in the prior path protection, the time for transferring a fault informing message is too long and the range of paths needing to be protected in the local protection is limited, and can implement fault protection among random nodes of the main tunnel.

Description

technical field [0001] The present invention relates to the field of network communication, in particular to a Fast ReRoute technology in a Multiprotocol Label Switching (MPLS for short) network. Background technique [0002] Fast rerouting is a protection technology for Label Switch Path (LSP) in MPLS network by means of traffic engineering (Traffic Engineering, TE for short). , referred to as RSVP) to achieve protection. Fast response and timely switching are important features of MPLS fast rerouting. After fast rerouting is deployed on the MPLS network, if a link or node fails, the traffic carried on the failed link or node will be quickly switched to the backup path for forwarding. The backup path can be established in advance or temporarily. The fast rerouting mechanism can reduce the packet forwarding loss rate and delay, so as to ensure the smooth transition of business data to the greatest extent and meet the requirements of high reliability. [0003] At present, ...

Claims

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Application Information

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IPC IPC(8): H04L12/24H04L12/56H04L45/28
Inventor 徐海兵刘高锦孙健
Owner MAIPU COMM TECH CO LTD
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