Research Of Key Technologies Of Inter-domain Routing Based On Software Defined Networking

In recent years,software defined network is regarded as an innovative network architecture,which has attracted wide attention from researchers.By separating the control plane of the network device from the data forwarding plane,the SDN is committed to realizing the flexible control of the data flow in the network,guiding the network development in software,agile,intelligent direction.The data exchange is realized on the OpenFlow switch,and the data forwarding control is realized on the controller,so as to realize the separation of the data forwarding layer and the control layer.Each new data stream of the OpenFlow switch must be forwarded by the controller.In the controller,these flows can be checked in accordance with the established rules,and then the controller specifies the transmission path of the data stream and the processing strategy of the flow,so as to better control the network.This paper introduces the development of SDN,and investigates several researches that can improve SDN systems in two directions of SDN controller and OpenFlow switch.Based on PeeringDB and BGP routing table,we designs an experimental analysis framework about inter-domain path characteristic and develops several key algorithms such as obtaining dataset,Internet exchange point(IXP)feature analysis,inferring method about inter-domain path including IXP and classifying inter-domain path,and then have statistical analysis of the structure of IXP and the influence of IXP on inter-domain routing.The experimental results provide some valuable data for evaluating the development of the Internet and effectively support the research of new architectures of Internet exchange point and new Internet routing services.Due to the emergence of a large number of new network applications,the traditional routing configuration model can not meet the needs of diverse applications.Need routing differentiated services to cope with the new network application,the data communication path on the application of adaptive allocation of appropriate routing function of network service providers need to design the calculation algorithm for inter-domain routing based on SDN.The algorithm realizes the control function of the routing calculation,as well as the multi domain matching forwarding function.In order to improve the network traffic control capabilities,to meet the needs of different network applications differentiated routing.In this paper,we propose a scheme to realize the routing function according to the port in the SDN architecture,and implement it on the control layer.The test cases are designed to test the flow control and the next hop routing control,and the feasibility of the scheme is proved.