1.白盒交换机？What is White Box Switching and White Box Switches?
White box switches refers to the ability to use ‘generic,’ off-the-shelf switching (or white box switching) and routing hardware, in the forwarding plane of a software-defined network (SDN). White box switches are really just that – ‘blank’ standard hardware. They represent the foundational element of the commodity networking ecosystem required to enable organizations to pick and choose the elements they need to realize their SDN objectives.
白盒交换机是指使用“通用”，现成的，交换机和路由硬件，在软件定义网络（SDN）的转发平面。白盒交换机就是 “空白”的标准硬件。
White box switches rely on an operating system (OS), which may come already installed or can be purchased from a software vendor and loaded separately, to integrate with the deploying organization’s Layer 2/Layer 3 topology and support a set of basic networking features. A common operating system for white box switches is Linux-based because of the many open and free Linux tools available that help administrators customize the devices to their needs. Traditional switches and routers generate and maintain their own forwarding and routing tables that can, generally speaking, broadcast to neighboring switches and routers. A white box switch may come pre-loaded with minimal software or it may be sold as a bare metal device. The advantage of this approach is that switches can be customized to meet an organization’s specific business and networking needs
白盒交换机依靠操作系统（OS），这可能会已经安装，也可以从软件供应商处购买，部署在2/3层拓扑结构上，支持基本的网络功能。通用操作系统是Linux，因为现有的许多开放和免费的Linux工具，可帮助管理员定制设备的需求。传统的交换机和路由器生成和维护自己的转发和路由表，通过广播的方式给相邻的交换机和路由器。而白盒交换机可能会预加载以最小的软件或者它就作为裸机进行销售。这种方法的优点是交换机可以定制，以满足企业的特定业务和网络需求