Failover Multi Wan Route Rebuilding
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We have two internet connections that are setup for failover and are in a routing group.
The primary connection is completely stable due to being a Fiber optic connection.
The second connection is a cable modem so it experiences some packet loss or completely goes down sometimes.
My problem is that when it drops the secondary connection it rebuilds the route which takes down the primary connection for about 10 seconds. If the secondary connection comes back but then goes out again it can do this over and over.
We run VOIP with an external server, RDP servers in the DMZ and Zoom meetings so all of these users experience their RDP sessions, calls and meetings freezing for 10 seconds and then again when the secondary connection comes back and then again if it goes down again etc.
It just happened during a big meeting with a Zoom call and I had to run over to the cable modem and unplug it so it wouldn't come back online and interrupt the meeting again and again.
Is there a way to make the secondary connection just drop off without rebuilding the route? Or maybe wait a certain amount of time before it rebuilds the route?
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@samsquanch In Pfsense, go to System > Advanced > Misc > Go to the gateway monitoring section.
My guess is that you have 'state killing on gateway failure' checked, which would do exactly what you describe. I have a Multi-Wan myself, IPv4 and IPv6 and whilst having that checked can be beneficial in scenarios when the primary goes down, it's sort of an own goal when the secondary is the one flapping/changing IP as you get interruption across all when you don't really need to have disruption.
I'd just de-select it as I've always fell foul to the issues you experience.
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@crucialguy Thank you. That helps a bunch.