ONOS: Towards an Open, Distributed SDN OS Pankaj Berde†, Matteo Gerola‡, Jonathan Hart†, Yuta Higuchi§, Masayoshi Kobayashi§, Toshio Koide§, Bob Lantz†, Brian O’Connor†, Pavlin Radoslavov†, William Snow†, Guru Parulkar† †Open Networking Laboratory, USA §NEC Corporation of America, USA ‡Create-Net, Italy ABSTRACT We present our experiences to date building ONOS (Open Network Operating System), an experimental distributed SDN control platform motivated by the performance, scal- ability, and availability requirements of large operator net- works. We describe and evaluate two ONOS prototypes. The first version implemented core features: a distributed, but logically centralized, global network view; scale-out; and fault tolerance. The second version focused on improving performance. Based on experience with these prototypes, we identify additional steps that will be required for ONOS to support use cases such as core network traffic engineering and scheduling, and to become
