Software-defined networking opens up new possibilities for architectures based on open source components, promising improved orchestration and agility, lower operational costs, and-most important-a wave of innovation. OVERVIEW OF OPEN SOURCE SDN PROJECTSFree/libre/open source software (FLOSS) provides the networking industry with low-cost and customizable network management and configuration tools, security suites, protocol testing and interoperability packages, and software appliances. As with any software-centric

Software Defined Networking (SDN) is an active area for network research, with many organizations exploring the opportunities provided by the decoupling of network control from packet forwarding. However, questions remain over the operation of such systems in production. In order to build operational confidence, we built Cardigan -a distributed router using OpenFlowand deployed it at a public Internet exchange. Cardigan applies a routing as a service abstraction to a RouteFlow controlled IP network in an effort to reduce operational complexity. The implementation and deployment efforts provide insights into the challenges involved with using these technologies, and suggests the viability of mixed device environments despite the limitations of early OpenFlow implementations.

Innovation in Campus Networks" introduced the idea that networks (originally campus and enterprise networks) can be treated more like flexible software rather than inflexible infrastructure, allowing new network services and bug fixes to be rapidly and safely deployed. 7 Since then many have shared their experiences using SDN (software-defined networking) and OpenFlow in wide area and data center networks, including at Google. 10 This article returns to enterprise and campus networks, presenting an open-source SDN controller for

Over a decade of work has gone into securing the BGP routing control plane. Through all this, there has been an oft repeated refrain, "It is acknowledged that rigorous control plane verification does not in any way guarantee that packets follow the control plane." We describe what may be the first deployment of data plane enforcement of RPKI-based control plane validation. OpenFlow switches providing an exchange fabric and controlled by a Quagga BGP route server drop traffic for prefixes which have invalid origins without requiring any RPKI support by connected BGP peers.

Using OpenFlow and DevOps for rapid development.