Method, device and system of reference link negotiation

Abstract

The invention provides a method, device and system of reference link negotiation. A first butting device receives LACP negotiation message which includes system priority and reference link information of the second butting device, sent through all sub-links in an aggregation link group by a second butting device. The second butting device selects the reference link the same as the reference link of the first butting device according to the system priority of the second butting device, so that butting devices at both ends of the Trunk selects reference links at both ends onto a same sub-link through negotiation, thereby preventing LACP negotiation failure and Trunk port fault due to inconformity of link selection.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a method, device and system for reference link negotiation. Background technique [0002] In terms of the hierarchical structure of the network and the reasonable allocation of bandwidth, Trunk (that is, link aggregation group) is an important way to expand bandwidth and link backup. Trunk technology is a link aggregation control technology that allows multiple chains Links are aggregated together and used as a logical port to form a link combination. Trunk technology can realize the mutual backup function of multiple links inside the trunk, that is, when a link fails, it will not affect the work of other links, and at the same time, traffic balance between multiple links can be achieved. [0003] However, in the prior art, the interconnected devices (for example, router A and router B) at both ends of the aggregated link cannot perceive the reference link informa...

AI Technical Summary

Problems solved by technology

[0003] However, in the prior art, the interconnected devices (for example, router A and router B) at both ends of the aggregated link cannot perceive the reference link information of the opposite end, and at the same time, the selection methods of the reference link are different. Different equipment vendors provide The devices did not agree on the selection of the reference link, and when the reference links of the connected devices at both ends are not selected on the same link, the sub-links cannot be aggregated into the current aggregation group, and the port has been unable to reach the selected link. selected state

In this case, the negotiation of LACP (Link Aggregation Control Protocol, Link Aggregation Control Protocol) will fail, resulting in a communication failure on the trunk port.

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