Research And Application Of Routing Algorithm And Traffic Monitoring Method In SDN Network

With the development of the Internet,the network needs to carry more and more businesses.The management of the network also becomes more and more complex.The network itself needs to become rapid,flexible,intelligent,and also should be easy to expand.SDN network architecture gives a way to solve the above problems.The main idea of SDN is to separate the data plane and the control plane,by using SDN controller realizes the centralized control of the network.In the traditional network,routing algorithm is usually packaged in the protocols.In a centralized control SDN network,the routing algorithm can be directly involved in the control of the network due to the programmability of SDN,which makes the algorithm easy to achieve.In this paper,by studing the realization of the spanning tree algorithm in Ryu controller,I developed the network access control algorithm based on spanning tree algorithm.Network traffic is the direct carrier of the network business,the integrity of the network function and the performance of the network can be checked by monitoring the network traffic.In the traditional network architecture,the most widely used monitoring method is based on SNMP or NetFlow protocol.In this paper,the traffic monitoring requirement in a Ryu controller based SDN network is realized through the introduction of sFlow controller.Finally,design a small enterprise network requirement as an example,by building a virtual network environment using Mininet,combine with Ryu controller and sFlow controller to realize the access control and traffic monitoring needs in a SDN network.