Research On Software Defined Networking Operating Mechanism For Internet

With the continuous changes in network application requirements and the continuous advancement of network innovation,the tight coupling between traditional network equipment data and control plane makes it impossible to provide flexible network control,automated network configuration and open network capability.SDN(Software Defined Networking,Software Defined Networking)conforms to the current trend of network innovation.The core concept of SDN is to separate the network device's forwarding and control plane,driving network innovation with software,and to make the network control and management more flexible,intelligent.The purpose of this paper is to build SDN network experiment environment by studying SDN network architecture and key technologies.On this basis,By analazing and Reseraching the SDN south network communication mechanism,north to the network application mechanism for in-depth,can we have the overall view of SDN network communication mechanism view in the Internet environment,and ultimately can we apply the SDN network Architecture and key technologies to the related cases.In this paper,the main work is as follows:First of all,we conduct an overv iew of the current development of SDN at home and abroad.we discribled the current domestic major equipment manufacturers,Internet companies SDN related research and foreign companies for the SDN technology applications related to the work done.Secondly,the SDN network framework of this research topic is designed by referring to the design idea of programmable network and SDN network architecture.Then,the OpenFlow communication mechanism of SDN southward network is studied deeply.At the same time,we dig into the traditional network's two and three layer forwarding mechanisms in the SDN environment,and through the development of SDN Web access control application,we verified the southbound communication mechanism.Finally,through the deep research on OpenDayLight controller function,OSPF routing protocol and Dijkstra algorithm,we developed the SDN network management application,static routing application,dynamic routing application based on Dijkstra algorithm with OpenDayLight northward REST interface,and the SDN northbound network Application of the operating mechanism is studied,and finally we can grasp the overall of the SDN network operating mechanism in the Internet environment.