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Method and device for realizing standby routing

A routing and link technology, applied in the field of network communication, can solve the problems that LFA technology cannot calculate alternate routes, alternate next-hop nodes, and low protection rate, so as to improve the protection rate and increase the calculation probability.

Active Publication Date: 2019-09-06
NEW H3C TECH CO LTD
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  • Abstract
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  • Application Information

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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 for realizing standby routing
  • Method and device for realizing standby routing
  • Method and device for realizing standby routing

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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 present application provides a method and device for implementing a backup route, wherein the method includes: after the first node calculates the main route from the node to the second node, calculates the PQ node using Remote LFA technology; if the PQ node is calculated node, the first node adds a routing table entry corresponding to the standby route in the routing forwarding table, and the routing table entry includes: the node segment label, the outgoing port, and the corresponding label stack of the second node, where the outgoing port is The port connected to the standby next-hop node on this node, the label stack includes: the node segment label of the PQ node and the node segment label of the second node; when the link between the node and the active next-hop node is detected When disconnected, according to the routing table entry corresponding to the backup route, the first node pushes the label stack in the routing table entry into the user packet that needs to be sent to the second node to obtain the encapsulated message. The outbound port forwards the encapsulated packets.

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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Patent Type & Authority Patents(China)
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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