SDN Traffic Control Based On OpenDaylight

With the development of network communication technology,computer technology and Internet services,the emerging Internet applications such as triple play,Internet of Things and cloud computing services have scalability,mobility,security,energy consumption,service quality and reliability,Ask a huge challenge.Traditional networks are difficult to meet the flexible resource requirements of cloud computing,big data,and other related services.For the change of requirements,network administrators often need to configure multiple network devices of different manufacturers and models at the same time.The workload is large and complex.It is very troublesome for the work of the network administrator.In order to solve the problems currently faced,a software-defined network emerges as the times require.The open interface is used to flexibly define the forwarding function of network devices by means of writing software,and the separation of control and data is realized.It is the most popular research direction in the global network field.The controller in the SDN network connects the underlying switching device with the upper layer service application,which can be said to be the core of SDN.This thesis uses ECLIPSE to re-develop the source code of the OpenDaylight controller,and adds interfaces such as flow entries and meter entries through the API interface of Open Flow.The MDSAL service is used to insert,delete,and update flow entries and meter entries.These basic functions are combined to complete the development of the SDN network traffic control plug-in,and realize the differentiated service function of QoS.Once the service requirements change,the controller only needs to send the traffic control plug-in to define the configured policy,and the network device will automatically update and effect.Operation no need to redeploy,to achieve the purpose of dynamic and flexible network traffic control,and finally integrate this architecture into the Mininet-based SDN simulation network environment,and compare and analyze with traditional network traffic control.The experimental results show that compared with the traditional network architecture given by the simulator,this architecture has obvious advantages in traffic control and can effectively improve network performance.The feasibility of QoS differentiated services based on SDN network is verified.