  Open Network Automation Platform (ONAP) is a carrier grade platform for
automatically deploying and managing Virtualized Network Functions. In this
paper, we address the deployment of network slices in order to come up with a
model that is compatible with ONAP. We analyze various types of network slice
ontology presented in the framework of 5G standardization bodies and we propose
an ONAP-compatible model on the basis of which we illustrate the design,
onboarding, instantiation and distribution of a network slice. We concretely
define and deploy a network slice implementing a private and customized mobile
core network. The achieved results not only make true NFV and 5G promises,
notably those referring to on-demand networks, service customization and
time-to-market acceleration, but they open the door to the deployment of
private tailored cloud-native 5G networks.
