Real Time Experimentation Study of Software Defined Networking based on Openflow Protocol Internet architecture is under stress by current Internet applications. Internet applications are resource demanding in terms of bandwidth, device configurations, route selection, and troubleshooting. Current Internet does not meet the user need; therefore, the Internet architecture should to be redefined in order to meet the demand of the resourcehungry applications. In this paper, we have analyzed the need of Software Defined Networking (SDN) to restructure the current Internet architecture. In addition, an experimental study of web request and reply based on open flow protocol is conducted to demonstrate the working of open flow protocol between open flow switch and an open flow controller in an SDN topology created in mininet. The analysis of traffic shows the messages exchanged between the open flow entities and the parameters contained in these messages.

Modeling and optimization of packet forwarding performance in softwaredefined WAN Abstract   As a novel network paradigm, SoftwareDefined Networking (SDN) offers numerous benefits for widearea networks (WAN), like promoting application performance and reducing deployment costs. However, it also comes along with an inherent penalty to essential network performance such as packet forwarding delay, primarily due to the involvement of logically centralized controllers. This paper is motivated to provide an accurate queueing system of packet forwarding performance in softwaredefined WAN based on modeling its controller cluster and OpenFlow switches. In particular, we approximate the packetin message processing of the controller cluster as an     M  xe2x88x95  M  xe2x88x95  n     queue based on the derivation of its message arrival process. Meanwhile, we characterize the packet processing of an OpenFlow switch as an     M  xe2x88x95  G  xe2x88x95  1     queue after taking an insight into its packet switching process. As a further step, we build an optimization model of controller cluster deployments to obtain the optimal number of controllers in the cluster. Finally, our proposed queueing model of SDN controller cluster is evaluated with the prevalent benchmark OFsuite_Performance by experiments, and their results indicate that our proposed model provides a more accurate approximation of controller cluster performance. Furthermore, we perform numerical analysis on packet forwarding delay and solve the optimal number of controllers for different varying parameters, which offer effective guidelines for softwaredefined WAN deployments.