Method and device for detecting link failure

Abstract

The present application relates to the field of communication technology, and discloses a method and device for detecting link failures, which are used to solve the problem that link errors are detected due to heavy CPU load, which in turn causes network interruptions and affects service processing. The method includes: among the two nodes that have established a BFD session connection, the first detection device of the first node sends a first heartbeat message to the second detection device of the second node according to the packet sending rule, and receives the second detection device The second heartbeat message sent; the first detection device will send session timeout information to the CPU of the third node after determining that the second heartbeat message is sent overtime based on the receiving time point of the second heartbeat message to trigger The CPU runs the BFD protocol to switch the session connection between the two nodes to the backup forwarding link. The first node completes sending and receiving packets through the first detection device and judges whether the session is timed out, thereby improving detection efficiency and reducing the impact of network interruption on service processing.

Description

technical field [0001] The present application relates to the technical field of communications, and in particular to a method and device for detecting link failures. Background technique [0002] With the deployment of a large number of network devices, people are provided with convenient and fast network services. If the network is interrupted, it may affect the normal operation of the business and cause heavy losses. Therefore, in order to reduce the impact of link failures on the business, two-way The forwarding detection (Bidirectional Forwarding Detection, BFD) protocol detects the links between adjacent network devices. The content of the scheme is as follows: [0003] First, a three-way handshake mechanism is used to establish a BFD session between two network devices. [0004] Since the steps performed by each network device are the same, the subsequent process will be described by taking one network device as an example. [0005] Secondly, a network device regula...

AI Technical Summary

Problems solved by technology

[0011] The embodiment of the present application provides a method and device for detecting link faults, which are used to solve the problem in the prior art that the link is incorrectly detected due to the overload of the CPU, and then the network is interrupted and the service is affected.

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