Comment 1 for bug 2060812

The Neutron API is only associating a floating IP with an internal port [0], there is no check for a server as that is under the purview of Nova.

Neutron will only raise a 409 on a 'create' call if the floating IP is already in-use, but not on a call to update it - either clearing or moving to another port.

I am curious to see what the Nova team thinks as it as according to their API the server add floating IP code has been deprecated [1].

[0] https://docs.openstack.org/api-ref/network/v2/index.html#floating-ips-floatingips
[1] https://docs.openstack.org/api-ref/compute/#add-associate-floating-ip-addfloatingip-action-deprecated