OpenDaylight is an open source platform for network programmability to enable SDN and create a solid foundation for NFV for networks at any size and scale. The community is comprised of hundreds of developers working across company lines to collaborate on an open, common architecture for SDN and NFV to pave the way for interoperability. Hydrogen is the first simultaneous release of OpenDaylight and is provided in three different editions - Base Edition, Virtualization Edition and Service Provider Edition - to help a wide array of users get up and running as quickly as possible. The platform includes a consistent set of APIs, expected systemic behaviors, and applications and supporting technologies that collectively increase interoperability and reduce risk of implementation and evolution. Because it is open source, OpenDaylight can be a core component within any SDN- and NFV -based architecture and allows enterprises, service providers, equipment providers and academia to begin to evaluate, commercialize and deploy SDN and NFV.