NAT virtual bridge on Debian¶

Append the following text to /etc/network/interfaces:

auto virbr10
iface virbr10 inet static
    # Make sure bridge-utils is installed!
    bridge_ports virbr10-dummy
    bridge_stp on
    bridge_fd 2
    address 192.168.100.1
    netmask 255.255.255.0

Bring the virtual bridge up.

# ifup virbr10-dummy
# ifup virbr10