Feature Description
The SMF learns about the other NF endpoints such as Unified Data Management (UDM), Access and Mobility Management Function (AMF), Policy Control Function (PCF), Charging Function (CHF) and so on, through NF discovery service exposed by Network Repository Function (NRF) or through the CLI configuration. The SMF prioritizes the NF discovery through the NRF. If the NRF is not available, then the SMF uses the local configuration of NF endpoints to discover the NFs.