IMPLEMENTING NDN USING SDN: A REVIEW OF METHODS AND APPLICATIONS

In recent years, many claims have been made about the limitations of today’s network architecture, its lack of flexibility and its inability to respond to ongoing changes and increasing users demands. In this regard, new network architectures are proposed. Software Defined Networking (SDN) is one new architecture that centralizes the control of network by separating control plane from data plane. This separation leads to intelligence, flexibility and easier control in computer networks. One of the advantages of this framework is the ability to implement and test new protocols and architectures in actual networks without any concern of interruption. Named Data Networking (NDN) is another paradigm for future network architecture. With NDN the network becomes aware of the content, rather than just transferring it among end-points. NDN attracts researchers’ attention and is known as the potential future of networking and internet. Providing NDN functionalities over SDN is an important requirement to enable the innovation and optimization of network resources. In this paper, a description of SDN and NDN are given, and methods for implementing NDN using SDN are introduced. Various methods are compared from hardware methods requiring changes in switches, to software methods such as using proxies, to methods that take advantage of unusable IP header fields as NDN headers. The advantages and applications of implementing NDN over SDN for routing, virtualization, traffic management, data centers, and heterogeneous networks are also pointed out.