Comment 2 for bug 1707381

This is not a bug. Please read this section of the documentation: https://docs.openstack.org/neutron/latest/admin/config-service-subnets.html#operation. Bottom line, a subnet with no service type is compatible with ports of any device owner. As a consequence, the following use case is perfectly valid:

1) The network has one subnet without service type
2) The network has one or more subnets with service types
3) The user wants to create a port on the subnet without service type with a device owner that matches the service type of one of the other subnets

Since a subnet without service type is compatible with any device owner, the port creation should succeed. This bug proposes to forbid it. Why? I am going to bring this bug up in the L3 subteam meeting that will take place on August 3rd at 1500 UTC in channel #openstack-meeting-3. The submitter of this bug is welcome to join the discussion