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SDN and NFV are collaboratively recognized as the most promising bearing for flexible programmability of network control functions and protocols with dynamic usage of network resources. SDN provides the abstraction of network resources over well-defined APIs to achieve underlying topology-independent multiple tenant networks with required QoS and SLAs. NFV paradigm deploys network functions as software instances, namely, VNFs on commodity hardware using virtualization techniques. In this way, virtual IP functions, such as load balancing, routing, and forwarding or firewall, can operate as VNF in a cloud with a positive outcome in network performance. In this paper, we aimed to achieve traffic load balancing by using a virtual SDN (vSDN) controller as a VNF. With vSDN, when there is uneven and increased load, secondary vSDN controllers can be added to share this load. The need of secondary vSDN …