Hi,
I am currently utilizing SD-WAN for load balancing and failover purposes with my internet service. However, I have encountered an issue with my current setup regarding the use of 8.8.8.8 and 1.1.1.1 as for SLA monitoring.
The problem arises when there is an issue with one of the ISPs, as 8.8.8.8 remains reachable. Consequently, despite the ISP being affected, traffic continues to flow through it. One ISP exhibits a latency of 20 ms to 8.8.8.8, while the other registers 100 ms.
Could you please provide advice on a more effective failover option in this scenario?
Thanks
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Hi @sims.,
If you want to failover when there is a high latency, you need to configure SLA Targets. https://docs.fortinet.com/document/fortigate/7.4.3/administration-guide/867342/performance-sla-overv...
Regards,
This has happened to me as well while using ICMP. Fortigate will let you choose a few different protocols, including DNS which I've changed ours to now. Haven't had an issue since those servers are meant to reply to DNS traffic https://100001.onl/ .
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