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[Slawek Kaplonski <1948452@xxxxxxxxxxxxxxxxxx>]

AFAIR qvo and qvb ports are created and deleted by os-vif (nova) and not
by neutron. So I don't think this is an Neutron bug really and I'm
moving it to os-vif for now.

** Also affects: os-vif
   Importance: Undecided
       Status: New

** No longer affects: neutron

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https://bugs.launchpad.net/bugs/1948452

Title:
  qvo ports are not removed correctly when an instance is deleted
  immediately after creation

Status in os-vif:
  New

Bug description:
  Release version:
  Neutron: stable/Ussuri
  (Open vSwitch) 2.11.1


  on searching the issue i see this raised earlier on Mirantis Openstack,
  https://bugs.launchpad.net/mos/+bug/1711637

  As mentioned in the link above, this is leading to excessive logging
  at OVS,

  2021-10-22T03:40:02.728Z|311606|coverage(revalidator631)|INFO|Skipping details of duplicate event coverage for hash=4a9bb48e
  2021-10-22T03:43:50.650Z|123897195|bridge|WARN|could not open network device qvoda000ab6-48 (No such device)
  2021-10-22T03:43:51.017Z|123897196|bridge|WARN|could not open network device qvoda000ab6-48 (No such device)
  2021-10-22T03:43:51.843Z|123897197|bridge|WARN|could not open network device qvoda000ab6-48 (No such device)
  2021-10-22T03:43:52.208Z|123897198|bridge|WARN|could not open network device qvoda000ab6-48 (No such device)
  2021-10-22T03:43:52.487Z|123897199|bridge|WARN|could not open network device qvoda000ab6-48 (No such device)
  2021-10-22T03:43:52.856Z|123897200|bridge|WARN|could not open network device qvoda000ab6-48 (No such device)
  2021-10-22T03:43:54.179Z|123897201|bridge|WARN|could not open network device qvoda000ab6-48 (No such device)
  2021-10-22T03:43:54.622Z|123897202|poll_loop|INFO|Dropped 17 log messages in last 4728 seconds (most recently, 4726 seconds ago) due to excessive rate


  ovs-vsctl shows some 100+ ports with vlan tag 4095.

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