SDN and NFV Sample Clauses

SDN and NFV. The new all-optical Data Centre Network proposed in COSIGN poses several challenges to the control and management, as well as to the infrastructure virtualization and orchestration, which are tackled in WP3 and WP4 of the project. In particular, WP3 puts its focus on the control layer. In the framework of COSIGN, the role of the control plane is two-fold. On the one hand, it is the responsible entity for configuring the optical data plane and providing the network intelligence. Thus, the control plane has to implement a set of procedures that allow the setup, tear down and modification of connectivity services that will be used by the upper layer applications. On the other hand, the control plane has to implement the tools necessary to enable the virtualization of the optical network infrastructure. The goal here will be to provide an abstracted and unified view of the underlying heterogeneous optical data plane to the application and orchestration layer. This logical representation of the network xxxx xxxx technology specific details of the data plane to simplify the configuration of the network infrastructure from upper layers (e.g., create virtual optical slices). In this context, the goal of COSIGN is to leverage arising software-based paradigms, such as SDN and NFV, by providing them with capabilities to control, manage, virtualize and orchestrate the proposed optical data plane. The SDN architecture aims at improving the programmability, automation and control of the network [SDN-ONF]. To achieve this, SDN decouples the control and data planes, and keeps the network intelligence logically centralized. The main entity in this model is the software-based SDN controller, which maintains the global view of the network infrastructure and centralizes the network intelligence. The controller has two main communication interfaces. The southbound interface (Data plane to Controller Plane Interface – D-CPI) communicates the controller with the underlying network infrastructure, thus enabling the management of the physical devices. The northbound interface (Application plane to Controller Plane Interface – A-CPI) allows the communication between the control and application layers. Hence, the controller enables the network infrastructure to be abstracted for upper layers applications and network services so it can be treated as a logical or virtual entity. From a functional point of view, with SDN, operators can modify the network behaviour and deploy new applic...
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