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[Rodolfo Alonso <ralonsoh@xxxxxxxxxx>]

Public bug reported:

The information provided in this RFE will be submitted in a spec.

There are several cases in the Nova/Neutron/os-vif interaction where the
knowledge of the neutron core plugin or ML2 driver would be useful to
facilitate a more robust handling of guest networking.

For example, in Icehouse, a external event mechanism was introduced to
allow neutron to notify Nova of network changes and VIF plugging. As the
occasion on which these events are emitted is dependent on the driver
that bound the port and Nova does not have knowledge of that. Therefore,
Nova cannot rely on the event to synchronize the operation between Nova
and neutron, which has lead to a race condition in the past.

** Affects: neutron
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1821058

Title:
  [RFE] Port binding event extended information for Nova

Status in neutron:
  New

Bug description:
  The information provided in this RFE will be submitted in a spec.

  There are several cases in the Nova/Neutron/os-vif interaction where
  the knowledge of the neutron core plugin or ML2 driver would be useful
  to facilitate a more robust handling of guest networking.

  For example, in Icehouse, a external event mechanism was introduced to
  allow neutron to notify Nova of network changes and VIF plugging. As
  the occasion on which these events are emitted is dependent on the
  driver that bound the port and Nova does not have knowledge of that.
  Therefore, Nova cannot rely on the event to synchronize the operation
  between Nova and neutron, which has lead to a race condition in the
  past.

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