BRIDGE setup in Mint 17.2 for KVM

Bridged networking is dedicated network card to a virtual machine which provides communication path to outside network, this must be setup before creating virtual machine using Virtual Manager.

This guide will help you to configure bridged networking on Ubuntu 14.10, you can either use command line or graphical mode.
Command line:

Edit interface file to create bridge “br1”, this should be executed on KVM host. My machine has two network cards eth0 and eth1, so i have created a bridge using both network card.

sudo nano /etc/network/interfaces

##Bridge Name ###
auto br1

### Bridge Information
iface br1 inet static
bridge_ports eth1 eth0
bridge_stp on
bridge_fd 0.0

### Bride IP ###
address 192.168.12.7
netmask 255.255.255.0
network 192.168.12.0
broadcast 192.168.12.255
gateway 192.168.12.1
dns-nameservers 8.8.8.8

Bring up the bidge.

sudo ifup br1