SDN控制器就像是一个整个架构的中间件。控制器必须整合网络中所有物理和虚拟设备。控制器会从与设备一起工作的SDN软件中提取物理网络设备。控制器与网络设备之间高度融合。在OpenFlow环境中，控制器会使用OpenFlow协议和NETCONF协议与交换机联系。(OpenFlow是将 ...

一个网络一般由多厂商的交换机和路由器组成，这些设备运行不同的操作系统、有不同的命令行接口和配置程序，我们能否对这个网络进行编程，让它管理工作流时能像演奏音乐一样和谐呢? OpenFlow告诉你，你能! OpenFlow是一个开源项目，诞生于斯坦福大学与加州 ...

ONF与思科之间的战争还在继续，OpenFlow 与IETF、ITU-T、ETSI等其它的SDN协议之间的发展也愈发引起人们的更多关注。这其中，OpenFlow仍是当前业界影响力最大的SDN协议。OpenFlow并不是SDN规定的必要元素，但SDN之所以成为互联网的前沿科技，很大一部分是因为OpenFlow的兴起 ...

Big Switch Networks推出一款称为Big Network Controller(大网络控制器)的OpenFlow控制器。该控制器用于与支持OpenFlow的第三方网络设备互动，并为应用程序提供编程接口。控制器是OpenFlow SDN(软件定义网络)架构的重要组件，而这种架构旨在提高自动化水平和优化网络设置。

The future of networking will be defined by software. That was the overriding theme after the first day of the inaugural Open Networking Summit, a conference dedicated to software-defined networking ...

在检查OpenFlow和SDN之间的差异时，要考虑到它们在基础设施中的位置。OpenFlow是一种技术——技术服务SDN，因为 它连接着控制权和网络设备，用户或企业看不到。相反，SDN是企业——技术界面，会先向用户和企业提供服务，然后再把服务转换成控制权可翻译的操作。

The following content is from an older version of this website, and may not display correctly. The Southbound interface between the switch and the controller was key to significant SDN possibilities.

The OpenFlow switching and communications protocol addresses packet routing on a software layer that's separate from a network's physical infrastructure. OpenFlow's major benefit is flexibility, ...

I’ve heard arguments for letting a Northbound interface develop over time organically instead of mandating via committee. And every one is looking for coalescence around a NBAPI. Instead of trying to ...

Big Switch Networks just launched a tool to allow OpenStack developers to more easily use open software defined networking tools to deployment of agile networking. The company's Floodlight, an open ...

The rationale for opening up more layers than just the control and forwarding planes in network programmability is to glean as much statistical and analytical information as possible from the router ...