Research On SDN Key Technology And Related Applications In Man

With the development of the Internet,people rely on data services,and the total network volume is growing rapidly.By 2020,it is expected to reach 44 ZBS,40 times the number of stars in the observable universe.It is expected that 463 eb of data will be generated every day in the world.The operating company will invest in capital construction in the early stage and human maintenance in the later stage.If it can improve the existing network with limited investment,the maintenance difficulty and cost will be reduced It can bring long-term benefits to the company.This paper studies the excellent characteristics that SDN software defines network architecture to reduce the occurrence of local network congestion.This characteristic can make the most of the transmission resources of data services.Through the direct control of the network by the centralized controller,it comes to the following conclusion: SDN relies on the programmable centralized control logic device to realize the separation of transfer and control,and also opens the interface to realize the operation Convenience.Through the research of SDN technology,which is different from the traditional equivalent multi-path network technology,it is found that SDN separates the network control function from the device,separates the control layer and the forwarding layer,so as to improve the dynamic of network management,the flexibility of network deployment,and the efficiency of network transmission.The analysis shows that SDN is the future development trend because it caters to the dependence of data center network on centralized network management,flexible networking and multi-path forwarding.By studying the congestion control method,the whole network sensing technology,the multi queue scheduling mechanism and the centralized optimization control method,the conclusion is as follows: this architecture can guarantee the bandwidth and delay of all kinds of high-density services.Using the fully programmable SDN switch and the personalized data flow table distribution mechanism,it can dynamically adjust the service transmission bandwidth and service flow Class.The main work of this paper is as follows:According to the above content,this paper analyzes the SDN network which is suitable for the communication operator's city domain network step by step,and focuses on the way of improving the existing network with SDN architecture,highlighting its characteristics of simplifying the maintenance interface.First of all,the background,significance and structure of the research are summarized.Secondly,it summarizes the architecture and key technologies of SDN,analyzes the difficulties of SDN application in the existing network,and provides solutions.Through data,it compares the improvement effect of SDN pilot and the existing network.At last,several implementable schemes of intelligent man in the future are given.