Comment 9 for bug 2024160

@ghanshyammann,
This bug was reproduced with a "live-migration" test, but notice the issue happened before any migrarion was performed:
"It's a test about live-migration, but it is important to notice that it fails before any live migration happens."
And it failed 100% times.

What you are reporting now looks similar, but it happens after live-migration (a few lines above, the test checked both subport and parent port are ACTIVE before live-migration):
https://github.com/openstack/tempest/blob/master/tempest/api/compute/admin/test_live_migration.py#L292
And apparently it doesn't fail always ("887220,4" was rechecked and the test passed):
https://zuul.opendev.org/t/openstack/builds?job_name=nova-live-migration&project=openstack/tempest

So, IMO, this is a different bug. Some things are common: OVN and trunk ports. Some things are different: happens after live-migration, doesn't fail 100% times.