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软件定义网络

软件定义网络英语Software-defined networking,缩写为SDN),一种网络虚拟化(Network virtualization)技术,由美国史丹佛大学Clean State计划提出。利用OpenFlow协议,把路由器的控制平面(control plane)从数据平面(data plane)中分离出来,以软件方式实现。这个架构可以让网络管理员,在不更动硬件设备的前提下,以中央控制方式,用程序重新规划网络,为控制网络流量提供了新的方法,也提供了核心网络及应用创新的良好平台。[1]
Facebook与Google都在他们的数据中心中使用OpenFlow协议,并成立开放网络基金会来推动这个技术。

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