什么是SD-WAN
什么是SD-WAN
定义
我们先来看一下Gartner上对SD-WAN的定义：
Gartner defines SD-WAN as functionality primarily used to connect branch locations to other enterprise and cloud locations. SD-WAN products provide dynamic path selection based on business or application policy, routing, centralized orchestration of policy and management of appliances, virtual private network (VPN), and zero-touch configuration. SD-WAN products are WAN transport/carrier-agnostic and create secure paths across physical WAN connections. SD-WAN products replace traditional branch routers and enable connectivity between enterprise branch locations as well as the cloud. They facilitate WAN connectivity’s evolution from Multiprotocol Label Switching (MPLS)-centric to public internet-centric in support of enterprise traffic shifts from private data centers to public cloud and SaaS.
从中我们可以提取出几个关键特征：
- 支持基于业务或应用的动态路径选择
- 易用的设备管理和集中式的策略编排
- 不依赖于特定的WAN传输方式
SD-WAN应用了哪些技术
SD-WAN显然不是单一技术，而是一系列技术加持、从实际需求中应运而生的一种网络传输方式。对于供应商来说，它是面向客户的产品。