Comprehensive Review on Load Balancing in Software-Defined Networking

A Software-Defined Networking (SDN)-based load balancer physically separates the network control plane from the forwarding plane and more than one device is able to be controlled at the same time when load balancing using SDN”. However, because of the higher loads on the control plane, the network capacity seems to be decreased. Therefore, to resolve this issue, the load could be split amongst different controllers. The uneven balancing of load amongst the controllers remains a challenging problem for the dynamic and scalability nature of SDN. Here, this paper aims to make a review on SDN load balancing systems. Accordingly, the literature review analyses the diverse techniques on SDN load balancing systems. At first, the survey portrays the diverse techniques adopted in each reviewed papers. Moreover, it offers the comprehensive analysis on the performance achievements and the respective maximum attainments in every contribution. Furthermore, the analysis concerns on diverse network configuration and topologies, and it also analyses the various tools adopted in each of the reviewed papers. Finally, it portrays the research issues that may help the researchers to carry out further analysis on SDN load balancing systems.