A Green Computing-based Algorithm in Software Defined Network with Enhanced Performance

Energy Consumption in Telecom and Internet Service Provider (ISP) network is increasing day-by-day due to the rapid growth of traffic volume. Software-Defined Network (SDN) is an emerging technique that separates control and data planes of the networking devices, e.g., routers and switches, enables centralized control over the network, and provides flexibility in network management. The minimization of the energy cost depends on the active components e.g. switches, links, etc. that affects the performance of network. Therefore, this paper formulates the energy-aware routing problem considering Equal-Cost Multi-Paths (ECMP) in the SDN network. To solve the problem, proposed link utility-based ECMP Routing prioritizes the hop count while re-routing the traffic flow pass through the below threshold (under-utilized) links. The proposed approach is compared with the similar other existing approaches, e.g., Next Shortest Path (NSP), Next Maximum Utility (NMU), and modified Maximum Ratio for Energy-saving in SDN (i.e., modified MaxRESDN) by considering performance of network and Quality of Service (QoS) parameters, e.g., links saved, energy-saving ratio, average link utilization, average path length. The comparative analysis shows that the proposed approach outperforms another state of the arts further overall performance improved in average path length is observed as 25% to 30%.