Learning OpenStack Networking - Third Edition

Associating floating IPs with ports in the CLI

Once a floating IP has been created, it is available for use by any user within the project that created it. To associate a floating IP with an instance, it is first necessary to determine the Neutron port that is associated with the fixed IP of the instance.

The port ID associated with the fixed IP address of an instance can be determined in a couple of different ways. The quickest way may be to use the openstack port list command with a filter that can narrow down ports per instance.

For example, the ports of an instance whose ID is 3d577137-9658-4226-906e-88d3117e497e can be determined in the following way:

Once the port ID has been determined, use the openstack floating ip set command to ...