A SYSTEMATIC LITERATURE REVIEW ON QUALITY OF SERVICE (QOS) IN MULTI CONTROLLER’S LARGE SIZE SOFTWARE DEFINED NETWORKS (SDN)

Abstract

Network infrastructure paradigm, Software-Defined Networking (SDN), allows networks to be more easily managed. The single centralized controller is unable to handle the increased flow processing requirements as the network grows in size. As a result, the multi-controller appears to be a potential option for SDN in big networks. An SDN compressive survey for multiple controllers is presented in this study. In the beginning, we give a general review of multi-controller, including its origins and problems. In addition, we have discussed different perspectives such as the architecture of SDN, SDN controllers and evolution, Relationship between SDN and QoS. In the last, different opportunities and challenges have been deliberated.