SDWAN strategy

[HS08]

What is best sdwan strategy for my case below.

I have 3 internet connections with bandwidth 100,200 and 300Mbps then i want to select link with low latency. If link with 100Mbps have lowest latency then this link will be used for all users, but in one side i want to utilize the other link if this lowest link is fully utilized.

Which sdwan strategy suitable for my case?

[knaveenkumar]

Hi 

configure sdwan performance sla it will check  the measure latency along with packet loss and jiter.
you can use sdwan spillover  

https://community.fortinet.com/t5/FortiGate/Technical-Tip-SD-WAN-usage-based-spillover-load-balance-...

[HS08]

there is no spillover in my fortigate. Needed specific firmware version?

[funkylicious]

if im not mistaken any version from 7.0 onwards has it, https://docs.fortinet.com/document/fortigate/7.0.17/administration-guide/216765/implicit-rule 

[Tauri]

Hi! What firmware version do you have?

You should create HC to specific IP address and configure SLA for that. You could test with spillover, but in my case I use source IP instead of Spillover. You could test both and check, what works for you the best.