Method, device and network equipment for realizing bidirectional forwarding detection

Abstract

The invention discloses a method, a device and network equipment for realizing bidirectional forwarding detection. The method comprises the steps of: dividing a plurality of sessions to be subjected to bidirectional forwarding detection into session groups with a set number, and polling each session sub-group according to a set polling period; specific to each session in the currently polled session sub-group, performing the following steps of: sending a keep-alive message to opposite-end equipment of each session and judging whether the keep-alive message sent by the opposite-end equipment is received or not in a set detection period; if the judgment is negative, determining that the corresponding session is in connectivity fault; or else, determining that the corresponding session is free of connectivity fault. According to the method disclosed by the invention, all the sessions do not need to be polled at the same time, so that the occupancy amount of a CPU (Central Processing Unit) is reduced and the system forwarding performance is increased.

Description

technical field [0001] The invention relates to the technical field of network communication, in particular to a bidirectional forwarding detection implementation method, device and network equipment suitable for multi-session. Background technique [0002] Bidirectional forwarding detection (Bidirectional Forwarding Detection, BFD) provides a light-load, short-duration network fault detection, so that when a fault occurs, an alternative channel can be established faster or switched to another link. The principle of BFD detection is: two devices on the link to be detected periodically send keep-alive packets to the peer end, and detect the keep-alive packets sent by the peer end. At the time of writing, it is considered that the link fails, and the corresponding route is withdrawn through the routing protocol to achieve the purpose of switching to the backup link. [0003] In the prior art, a system architecture for detecting session connectivity using BFD is as follows: f...

AI Technical Summary

Problems solved by technology

[0010] Embodiments of the present invention provide a bidirectional forwarding detection implementation method, device, and network equipment to solve the problem in the prior art that a large amount of CPU resources are occupied and the forwarding performance of routers is reduced when performing BFD detection on multiple sessions at regular intervals.

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