Behavior of sessions with links that no longer meet SLA requirements.

[mateusguilherme]

Hello

I have a question: when using SDWAN rules with Maximize Bandwidth (SLA) or Best Quality strategies, what happens to sessions already started on an Internet link that no longer meets SLA requirements? Are these sessions terminated by Fortigate or do they remain on the low-performance link until they are formally terminated by the application?

[AEK · Accepted solution]

Hi Mateus

I don't have an official response but it would be so bad if the sessions are ended for such reason. I guess they are kept on the same link, and new sessions are created on the second.

[mateusguilherme]

I configured a raspberry to simulate a bad link using the TC tool, I increased the latency and packet loss so that the link no longer met the SLA and apparently the session remained active on the link that no longer met the SLA requirements.

[AEK]

Thanks for sharing, Mateus

That was a good question and a good PoC.