SD-WAN关键技术

[摘要] 软件定义广域网（SD-WAN）是将软件定义网络（SDN）技术应用于广域网（WAN）连接的服务。重点阐述了SD-WAN应用的关键技术，包括SD-WAN服务中4种典型技术架构、SD-WAN的整体功能模块以及边缘设备中所采用的关键技术。与传统的WAN架构相比，SD-WAN技术以一种多接入、安全、策略驱动业务、弹性路由、多虚拟隧道、敏捷上云的方法重新定义了开放式的WAN架构。

[关键词] SD-WAN安全；策略驱动业务；弹性路由；多隧道；敏捷上云

[Abstract] The software-defined wide-area network (SD-WAN) is a specific service that applied the software-defined networking (SDN) technology to WAN connections. The key technologies of SD-WAN are focused on in this paper, including the technologies used in the following items: four typical technology architectures, the overall functional modules, and the edge devices. Compared with traditional WAN architecture, the SD-WAN technology redefines the open WAN architecture with a multi-access, security, policy-driven service, flexible routing, multiple virtual tunnels, and agile touching cloud approach.

[Keywords] SD-WAN security; policy-driven services; flexible routing; multi-tunnel; agile touching cloud