I am trying to get the same configuration I have using systemd-nspawn container when I have VirtualEthernet=no in the nspawn config file. In such container, the ethernet cards are the same from host.
I have been trying to use network.type=0 with no success.
This is what I have with nspawn. In the right side is the host and in the left the container.
I believe that the same can be achieved using lxc. The container has the same network configuration from the host.