Design a Hash-Based Control Mechanism in vSwitch for Software-Defined Networking Environment

Unlike a traditional network architecture, a software-defined networking architecture is divided into the control plane and the data plane. Network administrators use the centralized control plane to manage network authority and determine where network traffic is to be sent in the data plane. However, a centralized control structure causes a bottleneck with an overloading flow or under a DDoS attack. Under such conditions, the probability of network misconfiguration may increase rapidly and network performance may decline rapidly. This work paper proposes a hash-based mechanism that operates in the control plane to increase the reliability and scalability of the network. The hash function is utilized to assign incoming packets to queues in the control plane. The controller schedules the queues using a round-robin method to reduce the probability of failure in response to malicious attacks and to reduce transmission delay when network congestion occurs. The experimental results reveal that the proposed mechanism effectively distributes the workload and increases the reliability of the network under high-density data transmission.