A Research About Centralized-distributed Network Performance Measurement Model Based On SDN

The dramatical increase of the network load has a great pressure on the existing network structure,and SDN(software-defined networking)was born at the right moment.Accurate measurement of network performance is the prerequisite of network high performance operation.Under the above background,the paper mainly discusses the research of network performance measurement model.A developed structure based on OpenFlow,CD(centralized-distributed)network performance measurement model was proposed.Design the structure of centralized-distributed model,and realize the centralized control mode,and distributed measurement process.Upgraded the structure of the measuring entity,and formulated the keywords in the communication protocol between the components,and realized the communication between the components in the model and the structure components of finite state machine in the state of transformation.And the CD model is applied to the network traffic anomaly detection,the whole network data are distributed online collection,and the data was extracted by the random sampling method.According to the extracted data,using the entropy to judge the anomaly.Finally,the simulation experiments are carried out for the proposed CD model.The proposed CD architecture based on the OpenFlow structure improved the network traffic carrying capacity and data processing efficiency,and it could detect the abnormal behavior in the network in real time and accurately.The experimental results show that the model can improve the network traffic carrying capacity and improve the efficiency of data processing.It can detect the abnormal behavior in the network accurately.