Data message forwarding method and data message forwarding system in software defined network (SDN)

Abstract

The invention relates to a data message forwarding method and a data message forwarding system in a software defined network (SDN). The method comprises the steps that a subordinate controller receives header information; if not finding a target virtual machine in local, the subordinate controller inquires the information of a first associated port of a source virtual machine connected with a first virtual switch and generates first information; the subordinate controller sends the first information to a superior controller, so that the superior controller can acquire the information of a first port of a first domain virtual switch corresponding to the first associated port and the information of a second port of the target virtual machine connected with a second domain virtual switch according to the first information, acquires information of a first uplink interface and a second uplink interface for communication between the first domain virtual switch and the second domain virtual switch, and generates first flow table information and second flow table information, wherein the first flow table information is used for indicating the data message to be received through the first port and then to be sent out through the first uplink interface, and the second flow table information is used for indicating the data message to be received through the second uplink interface and then to be sent out through the second port. Through adoption of the method, applications deployed on all layers of controllers are guaranteed to be the same.

Description

technical field [0001] The invention relates to the field of network communication, in particular to a data message forwarding method and system in an SDN network. Background technique [0002] The traditional computer network is composed of autonomous domains and lacks a centralized control mechanism. Each network protocol needs to consider mechanisms such as network state coordination, network element discovery, and fault recovery. It is very difficult to deploy new functions on the network. Software Defined Network (SDN) proposes the idea of ​​centralized network control and separation of network control and data forwarding, which greatly facilitates network maintenance and deployment of new functions. [0003] When the network scale is large, the SDN controller (referred to as the controller) needs to be split into multiple to solve the problem of insufficient performance and reliability of a single node. Layering is a common splitting method. figure 1 It is a schematic...

AI Technical Summary

Problems solved by technology

[0004] In the existing technology, the control logic needs to be split into upper-layer control logic and lower-layer control logic, and this split is closely related to the split of the network by SDN, thus increasing the difficulty of App development

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