auto br0
iface br0 inet dhcp
    bridge_fd 0
    bridge_maxwait 0
    bridge_ports eth0
    bridge_stp off
    post-up ip link set br0 address  aa:bb:cc:dd:ee:ff

auto eth0
iface eth0 inet manual

auto eth1
iface eth1 inet dhcp

auto eth2
iface eth2 inet static
    address 172.16.200.1
    netmask 255.255.0.0

auto lo
iface lo inet loopback

