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[YAMAMOTO Takashi <yamamoto@xxxxxxxxxxxx>]

Public bug reported:

network-vif-plugged and friends are not well documented.
the timing when those events are sent varies among drivers.
inter-project api like this should be defined and documented super-clearly.

the behaviour isn't consistent even within reference implementations.
nova folks call them bind-time events vs plug-time events.
https://review.opendev.org/#/c/667177/

networking-midonet always make compute ports ACTIVE. (create-time events?)
https://github.com/openstack/networking-midonet/blob/stable/stein/midonet/neutron/ml2/mech_driver.py#L178
it stopped working recently.
https://bugs.launchpad.net/networking-midonet/+bug/1839169

networking-ovn has a relevant dirty hack.
https://review.opendev.org/#/c/673803/
it has a nice bug description.
https://bugs.launchpad.net/ubuntu/+source/neutron/+bug/1834045

references:
https://wiki.openstack.org/wiki/Nova/ExternalEventAPI

** Affects: neutron
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1840147

Title:
  network-vif-plugged and friends are not well documented

Status in neutron:
  New

Bug description:
  network-vif-plugged and friends are not well documented.
  the timing when those events are sent varies among drivers.
  inter-project api like this should be defined and documented super-clearly.

  the behaviour isn't consistent even within reference implementations.
  nova folks call them bind-time events vs plug-time events.
  https://review.opendev.org/#/c/667177/

  networking-midonet always make compute ports ACTIVE. (create-time events?)
  https://github.com/openstack/networking-midonet/blob/stable/stein/midonet/neutron/ml2/mech_driver.py#L178
  it stopped working recently.
  https://bugs.launchpad.net/networking-midonet/+bug/1839169

  networking-ovn has a relevant dirty hack.
  https://review.opendev.org/#/c/673803/
  it has a nice bug description.
  https://bugs.launchpad.net/ubuntu/+source/neutron/+bug/1834045

  references:
  https://wiki.openstack.org/wiki/Nova/ExternalEventAPI

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