Implementation experience in multi-domain SDN: Challenges, consolidation and future directions

In this work we present an open end-to-end multi-domain SDN system, while focusing on the necessary abstractions and virtualization techniques to integrate virtual wireless and optical resources. With the proposed system, called CONTENT, we shed light in the field of wireless-optical network virtualization from an end-to-end perspective. We present the architecture and the integrated testbed that realize the envisioned system. Evaluation results are provided and implementation experience is reported using the integrated solution. The way SDN methodologies and techniques can be used to support NFV concepts in end-to-end fashion are also presented.