I've got a Dell r630 server with a 4x gigabit network card in it. I tried to pass through 2 of the ports to an OPNsense VM but only one shows up in OPNsense.

I added one of the IOMMU groups that has 2 of the ports to bind to vfio at boot and after reboot i made an OPNsense VM with both ports added under Other PCI Devices: 
But only one of them shows up in OPNsense. Does anyone have any suggestions for what to try?

After looking around for a while i found more information here
I have the same network card dell fm487/Broadcom 5720.

Seems to possibly be a bug with virtualization somehow, as it works fine in bare-metal according to comments in the post i linked.
I plan on moving OPNsense to dedicated hardware later but right now i wanted to get it set up and working but i can't do that with only 1 port working so i need to find a fix

Just shooting from the hip here.

I recently read something about a dual Intel nic which a Linux driver bug was assigning the same MAC address to both nic ports on the card.

I know you are using Broadcom, but it couldn't hurt to check that the hardware does have two separate MAC addresses.

19 hours ago, ConnerVT said:

Just shooting from the hip here.

I recently read something about a dual Intel nic which a Linux driver bug was assigning the same MAC address to both nic ports on the card.

I know you are using Broadcom, but it couldn't hurt to check that the hardware does have two separate MAC addresses.

That could be something, do you know how i can check the MAC adresses for the NIC's?
EDIT: Checked iDRAC on the server, the ports have different mac ids. They end with 41,42,43 or 44.

Based on what I've found online it seems to be a bug in the BSD Kernel with broadcom chips that causes a RESOURCE_ALLOC_ERROR. I found a similar bug thread here about a similar chip and the same bug.
So I'm not sure if there is much I can do to fix it.

Edited April 23, 20242 yr by Ephoxia