Redundant Internet with SD-WAN
The following example demonstrates how to configure redundant Internet using the new SD-WAN feature in FortiOS 5.6.
The goal of SD-WAN is to seamlessly manage traffic at the Layer 2 level of the OSI model without the need to manage hardware-based switches or WAN controllers.
The example includes volume-based weighted load balancing so that 75% of your Internet traffic is handled by the ISP connected to WAN1, with the remaining 25% handled by the ISP connected to WAN2.
This configuration also means that in the event of a failure connecting to one ISP, all traffic will divert to the other WAN interface (this is commonly referred to as "failover").