Description of problem: For the purpose of making the CMS's life easier, it would help if a specific NB.Logical_Switch_Port.external_ids key, e.g., "ovn-cms-options", would be propagated by OVN to the OVS Interface record of the interface that actually binds that logical port. Today, ovn-northd already propagates all external IDs from NB.Logical_Switch_Port.external_ids to SB.Port_Binding.external_ids. The missing part is ovn-controller to propagate one Port_Binding external_id, e.g., "ovn-cms-options", to the OVS Interface that binds it.
This has been taken care of through bug 1995333. *** This bug has been marked as a duplicate of bug 1995333 ***