auto lo
iface lo inet loopback

iface enp9s0f1 inet manual
# Uplink for vmbr0

auto vmbr0
iface vmbr0 inet static
        address 192.168.20.2/23
        gateway 192.168.20.1
        bridge_ports enp9s0f1
        bridge_stp off
        bridge_fd 0
# Host Management

iface enp11s0f0 inet manual
# Uplink for vmbr1

auto vmbr1
iface vmbr1 inet manual
        bridge_ports enp9s0f0
        bridge_stp off
        bridge_fd 0
# Bridge for VMs on the Internet

iface enp11s0f1 inet manual
# Uplink for vmbr2

auto vmbr1
iface vmbr1 inet manual
        bridge_ports enp11s0f1
        bridge_stp off
        bridge_fd 0
# Bridge for VMs on network 192.168.30.0/24

iface enp9s0f0 inet manual

iface enp3s0 inet manual

iface enp2s0 inet manual