A comprehensive survey of interface protocols for software defined networks Abstract   Software Defined Network implementation has seen tremendous growth and deployment in different types of networks. Compared to traditional networks it decouples the control logic from network layer devices and centralizes it for efficient traffic forwarding and flow management across the domain. This multilayered architecture has data forwarding devices at the bottom in the data plane, which is programmed by controllers in the control plane. The highlevel management plane interacts with the control plane to program the whole network and enforce different policies. The interaction among these planes is done through interfaces that work as communicationprogramming protocols. In this survey, we present a comprehensive study of these interface and programming protocols, which are primarily classified into southbound, northbound, and eastwestbound interfaces. This work first classifies each of them into subcategories and then presents a comprehensive comparative analysis. As the different interfaces have different properties, hence, the subclassification and their analysis are done using different properties. In addition, we also discuss the impact of different virtualization techniques, such as hypervisors, on interface protocols and interplane communication. More over specialized interfaces for emerging technologies such as the Internet of Things and wireless sensor networks are also presented. Finally, the paper highlights several short term and long term research challenges and open issues specific to the SDN interface protocols.

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.