Controller placement problem during SDN deployment in the ISP/Telco networks: A survey

Abstract

With the successful implementation of Software-Defined Networking (SDN) in data center networking, the way forward for its deployment in the ISP/Telco network is becoming prominent. Small and medium-sized networks may easily adopt SDN. The research on SDN deployment and implementation for a large-scale network is continuing. This paper properly presents the current research status of Controller Placement Problem (CPP) and Multi-CPP (MCPP) over SDN with their specific challenges and provides a comprehensive review of the major performance metrics, that is, latency, and controller load balancing techniques. This survey highlights the use of network partitioning-based CPP and clustering approaches and their benefits in the context of SDN deployment. Moreover, this paper highlights the importance of implementing SDN and SDN security issues into ISP/Telco networks. Finally, we provide some key areas of ongoing research and discuss the future research direction regarding the various SDN-based Controller Placement (CP) issues in the next-generation IP and advanced networking technologies.