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.
Selecting the right IP/optical network controller is critical for end-to-end service delivery in a multilayer, multivendor, multidomain network. This paper lists a set of questions that we suggest service providers ask suppliers when determining whether the solution can truly deliver comprehensive, accurate visibility and control.
Without understanding the connectivity and dependencies between network layers, you are likely unaware of the wasted CapEx and OpEx spent on deploying, operating, maintaining, and troubleshooting the network. The Sedona NetFusion solution addresses these issues with products that focus on integrated discovery and control of the IP/MPLS and Optical layers.