SD-WAN applies SDN principles to wide area networks. It connects branch offices over multiple transport types with centralized control.
Traditional WAN problems: Expensive MPLS, manual configuration, slow provisioning, no visibility, backhauling cloud traffic.
SD-WAN solutions:
Transport independence. Use MPLS, broadband, LTE, or any mix.
Centralized management. Configure all sites from one console.
Application-aware routing. Route based on performance requirements.
Direct cloud access. No hairpinning through headquarters.
Encrypted overlays. Secure tunnels over any transport.