KREONET is deploying an SD-WAN called KREONET-S* based on ONOS to softwarize its network. It aims to provide a virtualized, dynamic and flexible environment compared to its previous hardware-based fixed network. KREONET-S* is being rolled out in phases starting with two regional centers in 2015 and expanding from there. It uses ONOS controllers and OpenFlow/OpenStack technologies. Initial applications include Virtual Dedicated Networks and user visibility tools. The goal is to provide advanced services, user-defined networks, and new user experiences through the programmable SDN infrastructure.