I'm using a CentOS 6.4 server with the hostname server1.example.com and the IP address 192.168.0.100 here as my KVM host.
I had SELinux disabled on my CentOS 6.4 system. I didn't test with SELinux on; it might work, but if not, you better switch off SELinux as well:
We also need a desktop system where we install virt-manager so that we can connect to the graphical console of the virtual machines that we install. I'm using a Fedora 17 desktop here.