I think this is config controlled right now with cfg.CONF.force_gateway_on_subnet.
https://github.com/openstack/neutron/blob/master/neutron/db/db_base_plugin_v2.py#L1068
I think this is config controlled right now with cfg.CONF. force_gateway_ on_subnet.
https:/ /github. com/openstack/ neutron/ blob/master/ neutron/ db/db_base_ plugin_ v2.py#L1068