The Emerging Control Hierarchy for Service Provider SDN-Enabled Networks

The control hierarchy for SDN networks is converging toward a three-tier structure. This paper describes this three-tier control hierarchy, which includes a service orchestrator, a network controller, and multiple domain controllers. It also describes the benefits of using a three-tier structure, which include faster innovation, a stable ecosystem of collaborating parties, and flexibility to replace building blocks with minimal effort and without vendor lock-in.

NetFusion Discovery System Description

The NetFusion Intelligence and Automation App Platform enables multivendor discovery of the Optical layer, IP/MPLS layer, and the cross-connections between the two layers. The accompanying NetFusion Explorer UI enables you to visualize and explore this multilayer network model in near realtime, showing optically-aware IP/MPLS routing and conversely, IP/MPLS-informed optical paths.