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ONAP components need to talk with external systems such as VIM/VNFM/vendor SDNC/EMS to orchestrate a network service, for example, VF-C need to talk with VIM to allocate resource and VNFM to deploy a VNF. So they should get the information of available external systems from a registry before call the Interfaces of these external systems. ESR provides a service to centralized management of the information (name, vendor, version, acess end point, etc.) of external systems. So the ONAP components can get the system information with unified API from a logical single point.
Note: This project is proposed to be a sub-project of A&AI.
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