Running a Virtual Machine in Bridged mode on KVM

The following method has been tested on Ubuntu 12.04

KVM can be run in Bridged mode by making some changes to /etc/network/interfaces file and using the KVM command accordingly. Changes to /etc/network/interfaces file. The following changes will use the interface eth0 as Bridge interface.

auto lo
iface lo inet loopback

auto br0
iface br0 inet dhcp
bridge_ports eth0
bridge_stp off
bridge_maxwait 0
bridge_fd 0

The command to run the Virtual Machine in Bridge mode:

$ kvm -m 256 -drive /dev/sdb -net nic -net tap