auto lo
iface lo inet loopback

auto eth0

auto br0
iface br0 inet static
      bridge_ports eth0
      address 192.168.254.100
      network 192.168.254.0
      broadcast 192.168.254.255
      netmask 255.255.255.0
      gateway 192.168.254.254
      bridge_stp off
      bridge_waitport 0
      bridge_fd 0