Performance analysis of software-defined network switch using M/Geo/1 model

The aim of this letter is to propose an analytical model to study the performance of software-defined network (SDN) switches. Here, SDN switch performance is defined as the time that an SDN switch needs to process packet without the interaction of controller. We exploit the capabilities of queueing theory-based M/Geo/1 model to analyze the key factors, flow-table size, packet arrival rate, number of rules, and position of rules. The analytical model is validated using extensive simulations. This letter reveals that these factors have significant influence on the performance of an SDN switch