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The top layer of the network functionality includes the components which provide visibility into the state of the network as well as automated network management. PNDA and SNAS can collect high volumes of network data in real time, and make them available to external management systems. ONAP is another entity that collects network performance and fault data. All the collected data can be used by the ONAP policy driven control loop automation which can take action to dynamically control the network in response to changing demand. Network faults may also be detected in this layer and in many cases the combined analytics capabilities of the projects can be used to trigger automation that provides self healing functionality to the network.
The OPNFV and CNTT projects focus on the integration of the different layers and provide tools and reference architectures for building networks. In addition, those projects provide certification programs for the network infrastructure and network functions that ensures that the different components of the network are fully compatible with each other and provide the expected functionality and performance.
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