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This section aims to present an end-to-end use case where the 8 LFN projects work in harmony to deliver a "service" that includes VNFs, connectivity and analytics-powered assurance as shown in the following picture:

Picture needs an update: VES - VNF Event Stream - from VNF directly to ONAP for VNF feedback loop

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In this example, 2 VNFs (for the sake of simplicity, provided by the same vendor) must be deployed on top of an NFVI (e.g., OpenStack), be interconnected and provided with external connectivity to the Internet. Moreover, the VNFs require network acceleration and the whole service must be assured using Analytics driven closed loop operations.

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  • OpenDaylight and Tungsten Fabric can be used as3rd party SDN solutionsto provide network connectivity.
  • Open Switch (OPX) can be used to configure the physical (underlay) network that connects the physical hosts used to deploy OpenStack The network topology may follow the leaf and spine topology as a physical infrastructure is recommended in the requirements of physical infrastructure of the CNTT Reference Architecture.
  • FD.io provides data plane network acceleration through its Vector Packet Processor (VPP). 

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  • An NFV vendor pre-validates and certifies a couple of VNFs (i.e., VNF1 and VNF2) through the OPNFV Verification Program (OVP).  Rabi Abdel  - Please add more details. The OVP program cover the following certification aspects of VNFs:
    • Compliancy of VNF Packaging to industry standards such as ETSI and ONAP.
    • The ability to onboard and life cycle manage VNFs on a given cloud platform.
    • Limited performance characterisation of VNFs.
  • The NFV vendor ensures that the VNF complies with the ONAP VNF requirements. This will enable ONAP to properly control the lifecycle of the VNF as part of a network service.

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At runtime, ONAP orchestrates the deployment of the whole service either through ONAP internal projects functions/components or leveraging the capability to interwork with 3rd party projectscomponents.

In particular, ONAP Service Orchestrator (ONAP SO) instructs the underlying ONAP projects functions in order to deploy all of the elements that compose the end-to-end service.

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By leveraging its SDN-C southbound interface, ONAP instructs Tungsten Fabric to create the external connectivity that will enable customers to "consume" the services offered by the VNFs. The predefined policies that will control the lifecycle of of the network service are designed using the ONAP design-time components such as SDC and CLAMP.

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