Using the OpenStack command-line client, instances can be attached to networks in a couple of ways. When an instance is first created, it can be attached to one or more networks using the openstack server create command. Running instances can be attached to additional networks using the openstack server add port command. Both methods are explained in the following sections.
If you're following along, the networks we created in the previous chapters have all been destroyed and recreated with similar names and segmentation IDs, but with new ID numbers.