Re: SD-Wan / Load Balancing
Load-balancing in later firmwares suppose to be a lot better than say 5.0.x and under. But I understand load-balancing is still a session-based affair. I don't think there is any way in predetermination as to how much traffic will be transferred over an established tcp (eg. port 80) connection, say downloading large iso files vs someone browsing a website.
That said, I am going to assume that volume-based load-balancing should eventually even out over a longer stretch of time. For better accuracy you will want to set the ingress/outgress values of both WAN interfaces so the fgt will know what the bandwidth limits to expect. And I would check the routing distance on both WAN connections to confirm they are equal.
NSE4/FMG-VM64/FortiAnalyzer-VM/5.2/5.4 (FWF40C/FW92D/FGT200B/FGT200D/FGT101E)/ FAP220B/221C