关于软件定义网络可扩展性的综述

摘要

SDN（software defined network）是一种新兴起的网络，它强调将数据平面与控制平面分离，大大提升了网络的灵活性。随着研究的深入，可扩展性问题逐渐成为研究的重点之一。为了给该问题的研究提供一个全面的视野，对可扩展性问题进行了深入剖析，包括可扩展性研究的背景和研究现状；从控制器的部署角度综合比较了几种较为成熟的解决方案，从两个方面探讨了可扩展性对于其他研究问题的影响，并介绍了其在世界范围内的实际应用。最后结合近年来的发展情况，提出了未来的研究趋势。%SDN(software defined network)is a network of recent rise,it emphasizes the separation of the data plane and the control plane,greatly improves the flexibility of the network.With the in-depth study,the scalability has become the focus of research.To provide a comprehensive view of the problem,this paper carried out further analysis of the scalability problem, included its research background and the research status.It compared several mature solutions from the perspective of the de-ployment of the controller,discussed the effect of scalability for other research problems from two aspects,and introduced its practical application in the world.At last,it proposed the future research trend depending on the state-of-the-art.