Why would I want to do that?
Well, if you are running CentOS 6 and want an easy way to play with the Cumulus VX, here is a good start.
On a CentOS 6 system running a GUI
#yum groupinstall "Virtualization*"
(this will install all your libvirt bits and pieces)
Then download the Cumulus KVM image (it is a qcow2 image) and remember the path
#sudo virt-install --os-variant=generic --ram=256 --vcpus=1 --network bridge=virbr0,model=virtio,mac=00:01:00:00:01:00 --boot hd --disk path=/home/user/cumulus.qcow2 --name=cumulus1
This only provisions the eth0 interface (mgmt) but it should get you a start to playing with the product.