LXC NIC Passthrough

On the rare occation you have a good reason to forgo the small overhead of an veth (Virtual Ethernet) device connected to an ethernet bridge it is possible to pass a physical network interface directly to a LXC host.

To pass a physical device you just need to provide lxc.net.[index].type and lxc.net.[index].link parameters in the LXC config. You may optionally provide a name for the link as well. Just be sure your index value is unique among all network interfaces fot the LXC container including those Proxmox may add if you running your LXC hosts on Proxmox.

lxc.net.0.type: phys
lxc.net.0.link: enp1s0
# optional
lxc.net.0.name: eth0