Comment 4 for bug 1918424

On the last drivers meeting (http://eavesdrop.openstack.org/meetings/neutron_drivers/2021/neutron_drivers.2021-03-19-14.00.log.html#l-76) we decided to approve this RFE.
Please now provide the spec with detailed information about this change and its prerequisite steps required by that new functionality.

We are now waiting for review spec proposed by You. Spec can be proposed to the https://opendev.org/openstack/neutron-specs repo.