VLAN DHCP timeout

[troubleinvland]

Hi all,

I'm having trouble getting my VLAN to (re)work after installing TrueNAS. I'm brand new to TrueNAS and FreeBSD, so excuse my noobness. I've set up a VLAN as follows:

Next, I've added a VM and attached it to vlan70:

I've successfully installed 2 VMs this way, getting proper DHCP replies in the process. It broke down after trying to install a third VM - although I doubt this has anything to do with it. Right now, I don't get DHCP replies on _any_ VM. For example, when I install Ubuntu I get:

The reason I'm posting this to this forum is that I suspect TrueNAS is doing something funny / something I don't expect. I think this because when I attach my VM to the parent nic, I _can_ access the VLAN when installing Ubuntu:

I've attached the output of `ifconfig`. Other than that, I'm not sure what my next steps would be. Any pointers?

 

[troubleinvland]

Turns out putting my BIOS in UEFI mode breaks VLAN support..? I've reverted to "legacy mode" and everything works as expected again.