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[Sean Dague <sean@xxxxxxxxx>]

I think this is an upstream xen issue and it's not clear we should be
working around it based on the patch commentary

** Changed in: nova
       Status: Incomplete => Invalid

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https://bugs.launchpad.net/bugs/1202199

Title:
  Emulated network driver is not working when using xen over libvirt

Status in OpenStack Compute (Nova):
  Invalid

Bug description:
  When using XEN over libvirt, emulated network drivers (rtl8139,e1000)
  will not work as the interface name is too long.

  By default XEN when running VMs in HVM creates two interfaces on host
  system:

  vifX.X (for PV drivers)
  vifX.X-emu (for emulated drives)

  -emu suffix combined with 14 characters long tap interface name is too
  long for a linux system and it results that vifX.X-emu can't be
  renamed to openstack standard.

  Additionally openstack expects tap interface to be without -emu suffix
  and all security groups settings will not also cover this interface
  (even if we will shortcut its name).

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