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Method and device of realizing backup route

A routing and link technology, applied in the field of network communication, can solve the problems of low protection rate, LFA technology cannot calculate alternate routes and alternate next-hop nodes, etc., to achieve the effect of improving the protection rate and increasing the calculation probability

Active Publication Date: 2016-11-23
NEW H3C TECH CO LTD
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Problems solved by technology

[0003] However, in most cases, the LFA technology cannot calculate the backup route and the backup next-hop node, and the protection rate is low

Method used

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  • Method and device of realizing backup route
  • Method and device of realizing backup route
  • Method and device of realizing backup route

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Embodiment Construction

[0027] Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with aspects of the present application as recited in the appended claims.

[0028] The terminology used in this application is for the purpose of describing particular embodiments only, and is not intended to limit the application. As used in this application and the appended claims, the singular forms "a", "the", and "the" are intended to include the plural forms as well, unless the context clearly dictates otherwise. It should also be understood that the term...

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Abstract

The invention provides a method and a device of realizing a backup route. The method comprises the steps that a first node uses the Remote LFA technology to calculate a PQ node after calculating a main route from the current node to a second node; if the PQ node is calculated, the first node adds a route table entry corresponding to the backup route in a route forwarding table, wherein the route table entry comprises a node segment label of the second node, an outlet port and a corresponding label stack, wherein the outlet port is a port used for connecting a backup next hop node on the current node, and the label stack comprises a node segment label of the PQ node and the node segment label of the second node; and when it is detected that a link between the current node and a main next hop node is disconnected, the first node compresses the label stack in the route table entry in a user message to be sent to the second node according to the route table entry corresponding to the backup route to acquire a package message, and forwards the package message through the outlet port in the route table entry.

Description

technical field [0001] The present application relates to the technical field of network communication, in particular to a method and device for implementing a backup route. Background technique [0002] LFA (Loop Free Alternates, Loop Free Alternate Next Hop) technology is a commonly used technology in link state routing protocols. The core idea of ​​the LFA technology is to use the SPF (Shortest Path First) algorithm to calculate the primary route from the source node to the second node and the primary next-hop node on the primary route without forming a loop. The backup route and the backup next-hop node on the backup route. In this way, after the link between the source node and the active next-hop node is disconnected, the source node can forward the data flow destined for the second node to the backup next-hop node, thereby forwarding to the second node through the backup route . [0003] However, in most cases, the LFA technology cannot calculate the backup route a...

Claims

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Application Information

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IPC IPC(8): H04L12/723H04L12/733H04L12/751H04L12/707H04L12/911H04L45/50H04L45/02H04L45/122H04L45/24
CPCH04L45/02H04L45/20H04L45/22H04L45/50H04L47/825
Inventor 晁军显
Owner NEW H3C TECH CO LTD
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