Research On Network Automatic Configuration Management Based On SDN

SDN(Software Defined Network)is designed to improve the network from the perspective of network resources,and promote faster business innovation through abstraction of the network.The SDN application layer is the key to reflect this view.Compared with traditional network applications,SDN applications will have stronger intelligence,dynamic control and programmability.The SDN controller interacts with the application and dynamically adjusts network resources according to the network requirements of the service.With the rapid development of SDN-related technology research,the scale and structure of the network are becoming more and more complex.As network configurations become more complex,the importance of network auto-configuration management is self-evident.Therefore,under the SDN network architecture,combined with the network configuration management method;it is very necessary to study the automatic configuration management technology of the SDN network.In this paper,by studying SDN and network configuration management related technologies,the system structure under the three-layer architecture of SDN network is given.Combined with the open and programmable features of SDN,the secondary development of the northbound interface of the SDN control layer is designed and implemented to include subnet configuration,topology management,flow table management,firewall and traffic monitoring.The subnet configuration module adopts the model search method in the configuration generation part,and formalizes the configuration task through the Alloy language and uses the Alloy analyzer to generate the final configuration solution.In the configuration delivery part,the Socket communication is used to complete the configuration data delivery and uses the Agent Technology to complete receiving and configuration.Topology management mainly provides the graphical display and update function of the network node and the connection relationship.The flow table management completes the configuration and delivery of the static flow table of the switch port.The firewall is responsible for the formulation and delivery of related rules and policies.Monitoring realizes real-time display and log generation of switch port traffic.Finally,the relevant functional tests were carried out on the simulation network to verify the feasibility of the system.