Detection method and device for communication link

Abstract

The embodiment of the invention discloses a detection method and device for a communication link. The method is applied to first network equipment, and the communication link exists between the first network equipment and the second network equipment. The method comprises the steps of: detecting a current port state of the first network equipment; when the current port state of the first network equipment is not a deactivation state, sending a detection message to the second network equipment by the communication link; when receiving a response message sent by the second network equipment in response to the detection message in a first preset duration, determining that the communication link is normal, and updating the port state of the first network equipment into an activation state; and when not receiving the response message sent by the second network equipment in the first preset duration, determining that the communication link has a fault, and updating the port state of the first network equipment into a pause data transmission state. By adopting the detection method and device disclosed by the embodiment of the invention, whether the communication link has the fault can be rapidly detected, and reliability of link detection is improved.

Description

technical field [0001] The present invention relates to the technical field of communication, in particular to a method and device for detecting a communication link. Background technique [0002] When the communication link connecting two network devices in the network fails, but the two network devices do not know that the communication link has failed, and still send messages through the communication link, it will cause abnormal communication. In this regard, a bidirectional forwarding detection (Bidirectional Forwarding Detection, abbreviated as BFD) technology is proposed. When the main link has a network failure, the data can be switched to the backup link for transmission through the BFD technology; when the main link failure is repaired, it can be transmitted through The BFD technology switches data back to the main link for transmission. When the BFD technology is bidirectional detection, the network devices at both ends of the communication link, the first networ...

AI Technical Summary

Problems solved by technology

When the BFD technology is bidirectional detection, the network devices at both ends of the communication link, the first network device and the second network device, need to configure BFD. If the first network device and the second network device belong to different manufacturers, you need to confirm the first network Whether the device and the second network device support BFD configuration, the applicable application scenarios are limited, and the operation is cumbersome

When the BFD technology is single-hop detection, only any node device in the first network device and the second network device needs to configure BFD, but it is only applicable to single-hop links and cannot detect multi-hop networks.

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