Method and system for detecting multi-hop link

Abstract

The invention relates to link failure detection techniques in the data communication field and discloses a method and system for detecting a multi-hop link. The multi-hop link is detected in an echo mode, system configuration is simplified, and system expenses are reduced. According to the technical scheme, the method includes the steps that A, a lower link terminal device establishes a multi-hop link detection message and transmits the detection message to an upper link terminal device through a port; B, the upper link terminal device analyzes the detection message after receiving the detection message to extract a source IP address and a target IP address of the message, a home terminal identifier field and an opposite terminal identifier field; C, the upper link terminal device carries out repackage on the received detection message, exchanges and fills the extracted source IP address and the extracted target IP address and exchanges and fills the extracted home terminal identifier field and the extracted opposite terminal identifier field; D, the upper link terminal device sends out the filled detection message after the head of a link layer is packaged. The system expenses can be effectively reduced through the method and system.

Description

technical field [0001] The invention relates to link fault detection technology in the field of data communication, in particular to a method and device for realizing multi-hop link inspection by means of echo. Background technique [0002] 4G network is a network with all IP addresses. At present, 4G equipment manufacturers are all based on NDIS (Network Driver Interface Specification) development, and the interface used is an Ethernet interface, which makes the traditional wide-area interface keep-alive function unusable. At the same time, the links that need to be detected in the 4G network are multi-hop links, so the traditional keep-alive function cannot be used to detect the links. From the perspective of existing technologies, BFD is most suitable for the detection of 4G links. [0003] The echo (Echo) function is an additional function for message sending. When using the Echo function, a group of echo message streams will be sent to other systems and looped back by ...

AI Technical Summary

Problems solved by technology

[0002] 4G network is a network with all IP addresses. At present, 4G equipment manufacturers are all based on NDIS (Network Driver Interface Specification) development, and the interface used is an Ethernet interface, which makes the traditional wide-area interface keep-alive function unusable. At the same time, the link that needs to be detected in the 4G network is a multi-hop link, so the traditional keep-alive function cannot be used to detect the link. From the perspective of existing technologies, BFD is most suitable for detecting 4G links

Neither the BFD control packet method nor the BFD echo function in the existing technology can simultaneously detect multi-hop links and support that one end of the detected link does not need to actively send any BFD packets.

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