SDN architecture of COSIGN DCN Control Plane Sample Clauses

SDN architecture of COSIGN DCN Control Plane. ‌ The role of the DCN Control Plane, and more in general the WP3 scope, within the SDN architecture defined by ONF is presented in Figure 6. Figure 6. WP3 role in SDN architecture The Network Elements (NEs) represent groups of data plane resources of COSIGN DCN managed as single entities at the control plane level. In general, in COSIGN a Network Element corresponds to a single network device deployed in the DCN infrastructure. However, the concept of aggregating more devices under a single Network Entity which expose a global, single interface towards the control plane is particularly useful in DC environments since it allows for integration of portions of the DCN with devices controlled by proprietary management solutions. This type of interaction will be not further considered in this work, since our focus is on the SDN-based operation of the COSIGN data plane optical resources. These devices directly provide interfaces suitable for the D-CPI, through dedicated Agents developed in WP3, without any mediation of proprietary control or management systems. The SDN controller is a logically centralized entity, with a synchronized and self-consistent view of the network under its exclusive control. Most of the COSIGN DCN Control Plane functions will be implemented within an SDN controller, through internal components which implement the SDN control logic for core network services. The SDN applications, running at the ONF Application Plane, can invoke services exposed by the controller (in this sense the orchestrator developed in WP4 is a typical example of SDN application) or can be invoked by the controller itself. Depending on the software design, some of the DCN Control Plane functional components can be developed in COSIGN as SDN applications, external from the controller. These network applications can provide support functions that can be re-used by the controller itself to implement its own services. However, they may also provide abstracted network services with their own APIs towards other COSIGN components, for example the cloud orchestrator or even other SDN applications at the Control Plane level, actually implementing the well-known SDN concept of recursive abstraction. Finally, typical Management Functions at the control plane level include policy configuration or performance monitoring. In COSIGN, they may be extended to SLA management and configuration, configuration of access/modification rights to Virtual Data Centre (VDC) infrastructures, e...
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