Studying the conceptual model of the controller in a software-defined network

Background. The central element in a software-defined network (SDN) is a controller that plays a key role in the management and control of network devices. There was a need to research and develop a conceptual model of the SDN controller as the most important part of the network. The purpose of the study is to develop a conceptual model of SDN controller in the AnyLogic program to evaluate the efficiency of data transmission. Materials and methods. This paper examined the performance, resource management efficiency and security of the simulation model. The physical components of the network such as device resource, switching and control nodes are briefly described. An algorithm for traffic distribution, resource management, and control and security functions is developed. The operation of the circuit with the SDN controller is debugged, data is measured, and network performance shortcomings are found. The solution to these shortcomings is to increase the network throughput by increasing the capacity of network equipment. Various tests and evaluation of the performance, efficiency, and stability of SDN controllers and their impact on the network infrastructure were carried out. Results. Setup, configuration of SDN controller network was done. Network with different bandwidths were investigated. Delays and overflows with a set number of incoming packets were identified. Due to the software-defined network with separate control, control and fast configuration of components is possible, it was shown in the experiments. Conclusions. The conceptual model of the SDN controller circuit was considered. But on its basis the positive and negative sides of the scheme with SDN controller have been revealed, and the solution for increasing the network capacity has been revealed.