On Tue, Jan 03, 2012 at 11:29:40AM -0700, Steven Dake wrote: > On 01/03/2012 05:32 AM, Mark McLoughlin wrote: > > On Fri, 2011-12-23 at 13:16 -0700, Steven Dake wrote: > >> Killing the first VM that was started (which has a MAC address equal to > >> the br0) will cause deletion of vnet0 and cause the bridge driver to > >> flush the arp table and choose a new bridge interface. This results in > >> disconnection of the remaining VM for 30-60 seconds. > > > > What exactly is happening during this time? The guest's routing table is > > configured with the host as its gateway and it has a stale ARP cache > > entry for the host? > > > > Cheers, > > Mark. > > > > br0 adopts the mac address of the first interface added to it. If the > first interface added to it is removed, br0 finds a new mac address from > the "next" interface in the bridge. When the mac address is removed, > the arp table is flushed for 30-60 seconds. Aside from the connectivity blackout, this mac address also causes pain for recent Windows guests, which will think they have been moved to a new physical network everytime the MAC addr changes, causing them to popup annoying dialog boxes on every login Regards, Daniel -- |: http://berrange.com -o- http://www.flickr.com/photos/dberrange/ :| |: http://libvirt.org -o- http://virt-manager.org :| |: http://autobuild.org -o- http://search.cpan.org/~danberr/ :| |: http://entangle-photo.org -o- http://live.gnome.org/gtk-vnc :| _______________________________________________ cloud mailing list cloud@xxxxxxxxxxxxxxxxxxxxxxx https://admin.fedoraproject.org/mailman/listinfo/cloud
