The Open Network Operating System (ONOS) is the first open source SDN network operating system targeted specifically at the Service Provider and mission critical networks. ONOS is purpose built to provide the high availability (HA), scale out, and performance these networks demand. In addition, ONOS has created useful Northbound abstractions and APIs to enable easier application development and Southbound abstractions and interfaces to allow for control of OpenFlow ready and legacy devices. Thus, ONOS will bring carrier grade features (scale, availability, and performance) to the SDN control plane, enable Web style agility, help service providers migrate their existing networks to white boxes , lower service provider CapEx and OpEx. ONOS has been developed in concert with leading service providers (AT&T, NTT Communications), with demanding network vendors (Ciena, Ericsson, Fujitsu, Huawei, Intel, NEC), R&E network operators (Internet2, CNIT, CREATE NET), collaborators (SRI, Infoblox), and with ONF to validate its architecture through real world use cases.
The following video shows an ONOS architectural overview.