软件定义网络及其应用分析  

Analyses of Software-defined Network and Its Application

作　　者：沈庆国[1] 黄寥若[1] 骆坚[1] 

机构地区：[1]解放军理工大学通信工程学院,江苏南京210007

出　　处：《计算机与现代化》2014年第4期133-137,147,共6页Computer and Modernization

基　　金：国家自然科学基金资助项目(61271254)

摘　　要：软件定义网络SDN(Software-Defined Network)是目前网络界大力研发的热点技术,但其发展方向和应用前景却需冷静反思。梳理从基于策略的网络管控到OpenFlow再到SDN的发展脉络,阐述SDN体系结构及其包含的网络可编程、网络虚拟化等技术思想,总结其创新特点和对网络发展的意义。分析SDN目前还缺乏清晰的商业模式、集中控制器存在状态收集和可伸缩性等问题,指出违背复杂系统管控规律所带来的局限性。介绍SDN典型应用场景,说明SDN的适用范围主要是在局部自治网络中跨IP网、光网络、无线网络等层面进行一体化管控。SDN （Software-Defined Network） is one of the hottest networks under research and development, yet its evolution di- rection and application potential need to be recognized calmly. By compared with policy based network, the principles of Open- Flow and SDN are introduced, and the SDN architecture is described. Its innovation in the network programmability and virtual- ization are illustrated in detail. The main problems of SDN such as application software license model, global status information collection and central controller scalability in large scale network are analyzed. It is pointed out that the SDN application domains are mainly local autonomous networks. The typical application scenarios are presented with the cross-layer integration require- ments of IP, optical and wireless networks emphasized.

关 键 词：SDN OpenFlow 体系结构 可编程 虚拟化 适用性 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]