A data communication method, control device and node

Abstract

Embodiments of the present invention provide a data communication method, control device, and node, which relate to the communication field, and reduce the possibility of packet loss while completing message transmission, and improve the success rate of message transmission. The specific solution is: obtain the message transmission path, perform the operation of simultaneously delivering the corresponding flow entry to each node on the path, and determine whether the operation of simultaneously delivering the corresponding flow entry to each node on the message transmission path If successful, if the operation fails, perform the steps of obtaining the message transmission path, the step of delivering the flow entry to each node at the same time, and the step of judging whether the delivery is successful, until each node successfully receives the corresponding flow entry; If the operation is successful, an activation flow entry message is issued to the head node, instructing the head node to execute the received flow entry, so that each node transmits a message according to the received corresponding flow entry. The invention is used for data communication.

Description

technical field [0001] The present invention relates to the communication field, in particular to a data communication method, control device and node. Background technique [0002] At present, a software-defined network (Software Defined Network, SDN) technology is widely concerned, and OpenFlow (Open Flow) is one of the open protocol standards. This technology mainly includes two parts: Open Flow switch and control equipment. The Open Flow switch forwards data according to the flow table (Flow Table), and the control device controls the generation, maintenance and configuration of the flow table. The Open Flow switch is responsible for data forwarding and mainly consists of three parts: Flow Table, Secure Channel and Open Flow Protocol. The secure channel is an interface connecting the OpenFlow switch and the control device. The control device configures and manages the OpenFlow switch according to the format specified in the OpenFlow protocol through this interface. Th...

AI Technical Summary

Problems solved by technology

[0004] The existing technology has the following problems: due to the unsatisfactory network status, the arrival time for the control device to send flow entries to each Open Flow switch on the packet transmission path is also different. If the packet passes through the packet transmission path If the switch arrives at an Open Flow switch and the switch has not received the flow entry for the time being or cannot deliver the flow entry to the switch due to network abnormalities, then the packet cannot continue to be forwarded after arriving at the switch, resulting in packet loss

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