auto lo

iface lo inet loopback

iface eth0 inet static
address 10.10.10.100
netmask 255.255.255.0
gateway 10.10.10.10
hwaddress ether b8:27:eb:48:1f:1f

iface br0 inet manual

iface vpn inet static
address 10.10.10.100
netmask 255.255.255.0
gateway 10.10.10.10
hwaddress ether 00:aa:bb:bb:aa:00
bridge_ports eth0 tap_soft
bridge_fd 6
bridge_stp no