A session in the DevNet Zone at Cisco Live, Berlin. OpenStack is well established as the public/private cloud platform, abstracting compute, storage, and networking resources behind a unified set of APIs. OpenStack Neutron provides the lion's share of networking resources and seems sufficient for many small private cloud deployments. As scale increases and service providers with large network footprints come into the picture, new complications arise. Service provider networks have requirements and capabilities far beyond those addressable with Neutron. Software Defined Networking (SDN) and Network Function Virtualization (NFV) has given rise to modular network controllers in the service provider space. OpenDaylight is the open source world’s answer, and service providers want to be able to marry OpenStack orchestration with OpenDaylight networking, as evident by the Open Platform for Network Function Virtualization project (OPNFV). Come learn how SDN controllers fit in this context vs. OpenStack with neutron drivers, when to use one when to use the other, and the benefits and functionality of each.