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The SDN Controller (SDNC) and the Application Controller (APPC) components of ONAP are based on OpenDaylight.
ONAP has Leveraging the common code base provided by Common Controller Software Development Kit (CCSDK), ONAP hasprovides two application level configuration and lifecycle management controller modules called ONAP SDN-C and ONAP App-C . These controllers manage the state of a single Resource (Network or Application). Both provide similar services (application level configuration using NetConf, Chef, Ansible, RestConf, etc.) and life cycle management functions (e.g. stop, resume, health check, etc.). The ONAP SDN-C has been used mainly for Layer1-3 network elements and the ONAP App-C is being used for Layer4-7 network functions. The ONAP SDN-C and the ONAP App-C components are extended from OpenDaylight controller framework.
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