#Create virtual tap0 interface
tunctl -t tap0 -u root

#Add eth0 and tap0 to the bridge and bring the interfaces up
brctl addif virbr0 eth0
brctl addif virbr0 tap0

ifconfig eth0 up
ifconfig tap0 up
ifconfig virbr0 up

brctl stp virbr0 on

#Check if tap0 and eth0 are properly pridged.
brctl show

#Assign IP address to virbr0 interface and remove IP address eth0 interface
ifconfig virbr0 172.16.1.2/16
ifconfig eth0 0.0.0.0 promisc

dhclient virbr0
ip addr flush dev eth0
route add default gw 172.16.255.254