A survey on stateful data plane in software defined networks

Software Defined Networking (SDN), which decouples control plane and data plane, normally stores states on controllers to provide flexible programmability convenient management. However, recent studies have shown that such configuration may cause frequent unnecessary interactions between in some cases. For example, a DDoS detection installed controller needs fetch information from periodically, introducing additional network delay overhead. Thus, stateful is proposed offload operation logics plane. Stateful allows switches perform operations independently, accelerating packets processing while reducing overhead both networks. increases the complexity of devices imposes many new challenges management schedule SDN enabled This paper conducts comprehensive survey latest research works provides insights into Both platforms compilers are extensively summarized analyzed, as well explicit design applications based them. Afterwards, we dwell fundamental technologies challenges, including implementation considerations Finally, conclude this with future discuss open issues.