Comment 7 for bug 1916428

It was topic on last l3-team meeting:
http://eavesdrop.openstack.org/irclogs/%23openstack-meeting/%23openstack-meeting.2021-05-19.log.html#t2021-05-19T14:38:02

We checked the proposed alternative Kea, and the questions which come out:
* License: Kea is MPL2.0 liensed, which need to be checked.
* Instead of Kea use ovs native implementation if possible, of course that is not good for linuxbridge or for sriov.