If you are not using Packstack's default values, you must decide on which components you would like to install. For component descriptions, see the "Component Overview" at https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux_OpenStack_Platform/.

In particular, either OpenStack Networking (neutron) and Compute Networking (nova-network) can be used for your cloud's networking infrastructure. By default, Packstack installs OpenStack Network, however you must decide which option is right for your needs. For a complete description of networking-type differences, see Choosing a Network Back-end for Red Hat Enterprise Linux OpenStack Platform.