Multi-link tunnel message transmission method and system

Abstract

The present invention relates to data communication technology. The invention discloses a multi-link tunnel message transmission method and system. Note that the technical solution of the method of the present invention includes configuring a virtual L2TP tunnel on each link, binding and identifying the links with established L2TP tunnels; initializing various queues, establishing a total sending queue, and a total receiving queue ; When the message arrives at the sending end, number the messages in the total sending queue, select the outbound interface according to the load configuration, and encapsulate the serial number of the different L2TP message header to identify the message; calculate the bandwidth according to the packet loss rate, and Adjust the sending rate of each link according to the bandwidth. The invention simultaneously discloses a multi-link tunnel message transmission system composed of a sender and a receiver. The invention can enhance link orderly transmission and anti-packet loss capability. By binding multiple links, the transmission rate of each line is reasonably adjusted to achieve balanced delay and expand service bandwidth.

Description

technical field [0001] The invention relates to a data communication technology, in particular to a multi-link tunnel message orderly transmission technology in the field of data communication. Background technique [0002] When an enterprise network leases a carrier network as a link, the stability, delay, and bandwidth of some links, especially wireless links, may change instantaneously or even be disconnected. In order to ensure its reliability, the link is generally backed up. The current backup technology includes dial-up backup or route backup. No matter which backup technology is used, the switching time of the link is generally more than tens of seconds. The main reason is that the switching needs The link ppp (Point to Point Protocol) keep-alive disconnection or the three-layer application and dynamic routing protocol are used as judgment conditions, and the generation of these conditions has a long time process. In order to expand the bandwidth, multi-link bundlin...

AI Technical Summary

Problems solved by technology

For TCP (Transmission Control Protocol) streams, due to the difference in the delay of each link, it is difficult to increase the bandwidth of a single TCP connection

At the same time, most operators have PPP proxy situations, and PPP keep-alive packets are all proxied by the operator, making it difficult for PPP keep-alive to reflect link connectivity, and in extreme cases, it will cause packet loss for a long time

When the bandwidth of one of the links changes, the current technology cannot adjust the traffic load of each link, which will lead to problems such as the data flow of some links may be too large and cause packet loss.

To sum up, the existing technology cannot solve the problem of inconsistent packet delays on multiple links, cannot solve the problem of packet loss caused by the interruption of one of the links, and cannot solve the problem of link bandwidth changes that the traffic sender cannot perceive and cannot make full use of. bandwidth problem

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