For what is worth, I get nothing listed on my 18.04 laptop, where I use libvirt extensively:
$ virsh iface-list --all Name State MAC Address ---------------------------------------------------
$
For what is worth, I get nothing listed on my 18.04 laptop, where I use libvirt extensively:
$ virsh iface-list --all ------- ------- ------- ------- ------- ------- --
Name State MAC Address
-------
$