Nova updates the MAC during initial boot via https://opendev.org/openstack/nova/src/commit/d20c1926553a6dcc50597a4ad14fcf93ad0b4b78/nova/network/neutron.py#L1173 but that code path is not called during cold migration
Nova updates the MAC during initial boot via https:/ /opendev. org/openstack/ nova/src/ commit/ d20c1926553a6dc c50597a4ad14fcf 93ad0b4b78/ nova/network/ neutron. py#L1173 but that code path is not called during cold migration