On Thu, May 08, 2014 at 11:00:40AM +0200, Tobias Honacker wrote:

Hi all,

using centos 6.5 and i'm asking if it is possible to run ovirt without connecting a bridge to ethX but running any kind of virtual bridge without touching my ethX interface.

The simplest trick is to run ip link add dummy_tobias type dummy as root on the host. This fake device would be reported as NIC to oVirt Engine, and you could build a local network on top of it. For smarter bridging of your network connectivity, you can use vdsm-hook-extnet as described in http://developerblog.redhat.com/2014/02/25/extending-rhev-vdsm-hooks/