A review on network monitoring in Software-Defined networking

Monitoring is an essential notion in network management because it allows network operators to assess how a network behaves and how its components are performing. Monitoring is also used for decision-making in traffic engineering, quality of service, and anomaly identification. For network provisioning and administration, software-defined networking (SDN) is becoming more prevalent. The SDN idea is now extensively used in a variety of network sectors, including university networks and service providers. According to an IHS Markit study, about 75% of networking providers have implemented or plan to use SDN. It is feasible to orchestrate the application plane, control plane, and data plane to meet management needs since SDN monitoring includes various network measurement techniques. The SDN monitoring findings may be expanded utilizing a variety of innovative network adaption methods thanks to tools to regulate forwarding rules and actions. This article examines the duties and difficulties connected with SDN, as well as the state of SDN monitoring. There are also a number of design ideas, research directions, and unresolved problems addressed.