NOA: A Middleware to Maximize the OpenDaylight SDN Controller Orchestration Perspectives

In the Software-Defined Networking (SDN) context, SDN controllers are expected to provide an efficient network infrastructure management to increase the ubiquity of the control plane. In light of this, this paper puts forward the Network Orchestration Agent (NOA), which is a middleware for the OpenDaylight controller that provides a set of functionalities to improve the amount of information made available to the applications. NOA employs dynamically defined filtering rules for this purpose, which significantly reduce the number of event messages for external management entities, such as orchestrators. The results of the assessment, that was conducted through scalability perspectives in arbitrary topology sizes, demonstrated the feasibility and effectiveness of NOA compared with the original OpenDaylight implementation.