At 7:04 PM +0200 25/5/14, Hans Vlems wrote: Anyway, i'd stop using the same 08-00-2B address on two nodes, shutdown the simulators the VM host and the real iron. I have another idea waiting in the queue : virtualize a second NIC and have each node have it's own. Bridge the virtual NIC's with real ones, so they communicate over wire. 10.1 -> AA-00-04-00-01-28 -> 08:00:27:DA:68:3D en0 Linux <-> en0 MacPro 10.2 -> AA-00-04-00-02-28 -> 08:00:27:A9:51:87 en1 Linux <-> en1 MacPro -- Jean-Yves Bernier