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Method for implementing fast multicast rerouting and its node

A routing and fast technology, which is applied in the branch office to provide special service devices, data exchange details, digital transmission systems, etc., can solve problems such as redundant protection paths, waste of network resources, and consumption of protection bandwidth, so as to reduce the number of states and save The effect of protecting bandwidth and optimizing network resource utilization

Active Publication Date: 2008-04-02
HUAWEI TECH CO LTD
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Problems solved by technology

[0008] It can be seen that the existing multicast fast rerouting implementation scheme needs to establish a backup LSP for each sub-LSP for protection. Since the links or nodes in each sub-LSP may overlap, if a backup LSP is established for each sub-LSP , it is easy to establish a large number of redundant protection paths, consume a large amount of protection bandwidth, and cause a waste of network resources

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  • Method for implementing fast multicast rerouting and its node
  • Method for implementing fast multicast rerouting and its node
  • Method for implementing fast multicast rerouting and its node

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Embodiment Construction

[0033] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and examples.

[0034] The basic idea of ​​the method for realizing multicast fast rerouting provided by the present invention is to determine the backup LSP route according to the tree topology structure of the point-to-multipoint main LSP, and establish the backup LSP according to the determined backup LSP route.

[0035] Corresponding to the method provided by the present invention, the present invention also provides a node, as shown in FIG. 3 , the node includes: a transceiver unit for sending and receiving messages and a standby LSP path establishment unit, wherein the standby LSP path establishment unit is used for The backup LSP route is determined according to the tree topology structure of the point-to-multipoint primary LSP, and the backup LSP is established ...

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Abstract

The invention provides a method for implementing the multicast fast heavy routing. A spare LSP router is confirmed by the tree topology of one-to-many main label exchange path LSP, and a spare LSP is established by the confirmed LSP router. During establishing the spare LSP, the information of main LSP and the information of the spare LSP are merged to reduce the number of the network signal state. The invention also provides a node composed of a receiving unit and an establishing unit of spare LSP path. The invention can save the protection band width and optimize the use of network source and increase the level of resource utilization.

Description

technical field [0001] The invention relates to a multi-protocol label switching (MPLS, Multiple Protocol Label Switch) network local protection technology, in particular to a method for realizing multicast fast rerouting (FRR, Fast ReRoute) and a node. Background technique [0002] FRR is a technology proposed by the Internet Engineering Task Force (IETF, Internet Engineering Task Force) to realize partial protection of MPLS networks. This technology uses the capability of MPLS traffic engineering to provide fast protection for Label Switched Paths (LSPs). switching capability. [0003] MPLS fast rerouting is characterized by rapid response and timely switching, ensuring smooth transition of service data and reducing service interruption. It establishes a local backup path in advance. When a fault occurs, the device that detects the link or node fault can quickly transfer the service Switching to the backup path protects the LSP from being affected by link or node failures...

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Application Information

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IPC IPC(8): H04L12/56H04L29/06H04L12/18H04L45/28H04L12/54H04L45/02H04L45/247
CPCH04L45/22H04L45/502H04L45/28H04L12/5695H04L45/48H04L45/02H04L47/728H04L45/00H04L45/16H04L47/70
Inventor 张海燕
Owner HUAWEI TECH CO LTD
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