vmbr0 without physical uplink

@life-from-scratch, things still stable a while after the changes you made? Just curious how it is working out. 

Been without power since yesterday so homelabbing has been limited. Still seems to be working, aside from the massive pain in the butt my network setup is currently when the power is flakey. (The machine my PfSense router is virtualized on takes 20 minutes to boot because of my SATA controller and doesn't always survive the change over from shore power to battery (Victron Multiplus inverter) so when the power goes out from a tree hitting a powerline somewhere My Victron Cerbo GX starts an alarm to tell me the shore power went down. Simultaneously the server shuts down taking my network with it. So then I have to wait 20 minutes for it to reboot and the network to come back up before I can access the Cerbo dashboard and shut off the alarm.) Lots of jank going on. 

However, I do have a cunning plan. I've got one of those fanless N100 mini-PC's on order. Those are powered by 12VDC so I can run it directly off the battery so AC power loss isn't a factor. Then I'll load Proxmox on it and move my PfSense router and Home Assistant to it. That way I've got a super low power system running just my critical infrastructure. And if I get really fancy I can set up backup VM's on my main server and setup failover so even if my router box dies I'm still functioning.