On 04/28/2011 09:56 AM, Robert Šmol wrote: Are you volunteering to write some code? :-) There have been requests for both, and both should eventually be done, so I guess pick whichever one you like better :-) (since there's already a patch for VDE, albeit with different XML than we'd like, that may be quicker to finish.) You may want to follow development of the work I'll point out below, though, otherwise you could waste a lot of time. Once we get into these kinds of questions, it's probably best to switch to the developers' list (libvir-list(a)redhat.com) to get better exposure to people writing the code. I'm Cc'ing this message there (and switching the Reply-To: as well). In particular, I recently send an RFC to libvir-list proposing an expansion of the <network> XML to remove the hard-coded connection between guest interface and host interface for macvtap (type='direct') interfaces: https://www.redhat.com/archives/libvir-list/2011-April/msg00591.html and in a followup message showed how we could expand on this work to provide support for openvswitch (or vde): https://www.redhat.com/archives/libvir-list/2011-April/msg00640.html I'm planning to have this code finished and tested within the next two months at most (hopefully considerably earlier). If you're interested in implementing a <network type='openvswitch'> or <network type='vde'> you should subscribe to libvir-list (if you aren't already) so that you can follow along.