Performance Evaluation Comparison Between Central SDN Network and DSDN

Software-Defined Networking (SDN) is a cutting-edge technology for increasing network programmability. Because of its centralized nature, SDN is particularly susceptible to single point of failure (SPoF) and scalability issues. Distributed SDN (DSDN) offers to eliminate the single point of failure; security issue, and scalability that present in the centralize SDN controller. The main concept is to have numerous controllers that can share the burden on the network, and one controller can take over another controller when it breaks.in this paper we work on Performance Evaluation comparison between central SDN network and DSDN, The Result Of Performance Evaluation Comparison Between Central SDN network and DSDN show that the dropped packet of (SPoF) in central SDN was 100% while the percentage of Dropped Packet decrease to 12%, and 22% as one controller, two controllers respectively fail in DSDN. The performance evaluation of Topology Discover shows there are a Progressive relationship between the time of Topology Discover and number of nodes in data plane. The Throughput of distributed Opendaylight controllers is 16.8% points higher than that of the centralized controller, while the centralized Opendaylight controller has a 22.4% greater Latency than distributed SDN controllers; where each of Throughput and Latency are SDN network Scalability metrics.