SDN网络可扩展性问题的研究  

Research on Scalability of SDN

作　　者：邓志华[1] 吕光宏[1] 

机构地区：[1]四川大学计算机学院,四川成都610065

出　　处：《计算机技术与发展》2016年第3期14-17,22,共5页Computer Technology and Development

基　　金：国家"863"高技术发展计划项目(2008AA01Z105)

摘　　要：软定义网络(SDN)将控制平面从数据平面中解耦合,通过使用一个统一的控制平面来管理网络事件,并通过全局网络视图来同步网络状态,以此提供一个更加灵活和易于管理的网络;然而,由于数据平面和控制平面的分离增加了对Open Flow事件处理额外的计算和网络资源消耗,随着网络流量的增加,不可避免地会使控制器和交换机以及控制器与控制器之间通信量的增大,因此单一的控制器或者设计不合理的多控制器网络拓扑都有可能使SDN网络出现可扩展性问题。为了解决SDN网络的可扩展性问题,文中从引起网络拥塞的原因以及网络转发器件性能两大方面进行分析,分别针对SDN的可扩展性问题从减轻网络负载和设计更加合理的网络器件两个角度出发,分析并综述了近两年在该领域的研究与贡献。Software Defined Network （SDN） provides a more flexible and a better management network,by a united control plane which decoupled from data plane to manage network event and a global network view to synchronize network status. However,as the separation between data plane and control plane increased to OpenFlow event handling additional computing and network resources consumption, with the increase of network traffic,it will inevitably make the traffic increasing between controller and switches, as well as between controller and the controller,and that may lead to scalability issues occurred in SDN network. In order to solve the problem of SDN network scalability, the analysis is conducted from the cause of network congestion and network device performance. Starting from reducing net-work load and designing more reasonable network device,the contribution and research in this field is analyzed and summarized in past two years.

关 键 词：软定义网络 可扩展性 网络负载 网络器件 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]