I just re-read the above and see that xen devices are currently ignored.
Given that, I do think it makes sense to also handle vmware (and
possibly even virtio devices the same way).

That said, we don't want xen, vmware, or any systems with multiple
network interfaces to give non-deterministic ordering.  If its not
already common, I would expect virtual machines with multiple interfaces
to be common in the future.  It would be nice to something to handle
that correctly.

Would it be possible to do add persisitent rules based not on MAC addr, but on 
bus location?  The idea would be that in a new VM, the devices would be 
attached the same, but different MACs.  if the rule said:
  "device on pci bus at 0000:00:19.0 is eth0"
  "device on pci bus at 0000:00:19.1 is eth1"
That might be persistent across VMs (or at very least could be made to be), and 
would be deterministic for multiple network devices.

-- 
ease cloning of virtual images by disabling mac address rules
https://bugs.launchpad.net/bugs/341006
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