auto lo
iface lo inet loopback

auto eth0
iface eth0 inet manual

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

auto eth1
iface eth1 inet dhcp

auto eth2
iface eth2 inet static
    address 172.16.200.1
netmask 255.255.0.0
