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This was exactly what I have needed for a pfSense VM on threadriper, was running ok on previous build with Intel on it, but after migrating to threadriper, it was not working any more, this has solved the problem

A quick update. In fact with the above configuration it work. In the command line settings it is not detected in real time that the port is used. Just select it and in the web GUI it will be displayed correctly all 4 ports.

@Beaker69Which was the solution?

@Actua, thank you for the replay. I was looking at first at exactly that tutorial the problem is that only one of my ports are detected if I follow those steps, it is something to do with how the card is pass through to the VM. I have found another post that somehow solves part of my problem. For a more detailed explanation on what is the problem that we have in fact please what the below tutorial from @SpaceInvaderOne for GPU but the same applies to our problem. But for now only 2 ports are working following those steps, below it is noted how to make all 4 ports be displayed the problems is that only the first 2 are detected the other 2 are displayed in VM(which is an improvement) but no connection is detected on those 2 ports. I will try to figure out and if I find a solution I will post it. For now for the first 2 to work and also for the other 2 to be displayed below is the xml configuration. <hostdev mode='subsystem' type='pci' managed='yes'> <driver name='vfio'/> <source> <address domain='0x0000' bus='0x05' slot='0x00' function='0x0'/> </source> <address type='pci' domain='0x0000' bus='0x01' slot='0x00' function='0x0' multifunction='on'/> </hostdev> <hostdev mode='subsystem' type='pci' managed='yes'> <driver name='vfio'/> <source> <address domain='0x0000' bus='0x05' slot='0x00' function='0x1'/> </source> <address type='pci' domain='0x0000' bus='0x01' slot='0x00' function='0x1'/> </hostdev> <hostdev mode='subsystem' type='pci' managed='yes'> <driver name='vfio'/> <source> <address domain='0x0000' bus='0x06' slot='0x00' function='0x0'/> </source> <address type='pci' domain='0x0000' bus='0x01' slot='0x00' function='0x2'/> </hostdev> <hostdev mode='subsystem' type='pci' managed='yes'> <driver name='vfio'/> <source> <address domain='0x0000' bus='0x06' slot='0x00' function='0x1'/> </source> <address type='pci' domain='0x0000' bus='0x01' slot='0x00' function='0x3'/> </hostdev>

Hi, I know that this is an old thread, but did you manage to resolve this problem? I have the exact same card and the same errors are returned and I can't seem to find a solution for this. Thanks