Bridged networking with libvirt

Add to /etc/sysconfig/network-scripts/ifcfg-eth0

BRIDGE=br0

And remove (if present):

BOOTPROTO=dhcp

Create new file as /etc/sysconfig/network-scripts/ifcfg-br0

DEVICE=br0
TYPE=Bridge
BOOTPROTO=dhcp
ONBOOT=yes
DELAY=0