Setting a Network Bridge br100 - Ubuntu

edward@jaku:~$ cat /etc/network/interfaces
# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).

# The loopback network interface
auto lo
iface lo inet loopback

# The primary network interface
auto eth0
iface eth0 inet dhcp

auto br100
iface br100 inet dhcp
bridge_ports	eth0
bridge_stp	off
bridge_maxwait	0
bridge_fd	0

iface wlan0 inet dhcp

#
#auto br-xen
#iface br-xen inet static
#        address 139.82.2.182
#        netmask 255.255.255.192
#        gateway 139.82.2.129
#        bridge_ports eth0
#        bridge_maxwait 0