Scalability Analysis in Mininet on Software Defined Network using ONOS

Software Defined Network (SDN) is a promising solution towards traditional network as SDN is more flexible in configuring and managing the network. A controller is a programmed software that allows controlling the network as a whole, thus, provides a central view of the network itself. However, despite the advantages, SDN is prone to experience Single Point of Failure (SPOF) as it depends on the controller to handle the network. This paper aims to analyse the scalability of SDN in middle-sized network by measuring its throughput and latency. ONOS controller is observed over single topology and mesh topology by gradually increasing the number of nodes until it is supported by the system with optimum resource utilization. Results from these experiments shows that mesh topology has higher average throughput compared to single topology with 8.41% difference for minimum number of nodes (i.e. 50 nodes) and 12.11% difference for maximum number of nodes (i.e. 250 nodes). With a slight difference, it shows that the number of nodes can be added to more than 250 nodes in mesh topology with a balanced throughput. Meaning that it scales well if there is no constraint of limited resources.