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Link fault detection method and device

A technology of link failure and detection method, applied in the field of communication

Active Publication Date: 2018-11-06
NEW H3C TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, FRR technology usually uses BFD (Bidirectional Forwarding Detection, bidirectional forwarding detection) session to continuously detect links. However, the existing BFD session can only automatically establish a single-hop BFD session between directly connected neighboring devices.
For two devices that are not directly connected, they cannot be detected through the BFD session

Method used

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  • Link fault detection method and device
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  • Link fault detection method and device

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Embodiment Construction

[0053] In order to make the purpose, technical solutions and advantages of the present disclosure clearer, the technical solutions in the present disclosure will be clearly and completely described below in conjunction with the drawings in the present disclosure. Apparently, the described embodiments are part of the implementation of the present disclosure. example, not all examples. The components of the present disclosure generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations.

[0054] Accordingly, the following detailed description of the embodiments of the present disclosure provided in the accompanying drawings is not intended to limit the scope of the claimed disclosure, but merely represents selected embodiments of the present disclosure. Based on the embodiments in the present disclosure, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong ...

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PUM

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Abstract

The disclosure provides a link fault detection method and device. The method includes the following steps: enabling a routing node in an IP network to receive a first BFD message that is sent througha target path, and if the first BFD message is a multi-hop BFD message including a multi-hop BFD mark, determining whether an address of an interface that receives the first BFD message is the same asa destination address of the first BFD message; if the addresses are the same, exchanging the destination address and a source address of the first BFD message to obtain a second BFD message; and sending the second BFD message to a target node that sends the first BFD message to ensure that the target node determines that the target path fails when the second BFD message is not received within apreset time period. Thereby, the multi-hop BFD detection of the target path can be achieved.

Description

technical field [0001] The present disclosure relates to the technical field of communications, and in particular, to a link fault detection method and device. Background technique [0002] The basic principle of FRR (Fast ReRoute, fast rerouting) technology is to automatically calculate the backup route (backup next hop) in advance. Once a link failure is detected, the backup route is used to guide the forwarding. The traffic interruption time is equal to the time of detecting the adjacent failure. The sum of the time taken to replace the failed route with the backup route saves the time for route calculation and synchronization between forwarding table boards, and greatly shortens the traffic interruption time. [0003] At present, the FRR technology usually uses a BFD (Bidirectional Forwarding Detection, bidirectional forwarding detection) session to continuously detect links. However, the existing BFD session can only automatically establish a single-hop BFD session betw...

Claims

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Application Information

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IPC IPC(8): H04L12/26
CPCH04L43/08H04L43/50
Inventor 梅树
Owner NEW H3C TECH CO LTD