Secondary Authentication Call Flow

The following flowchart explains the secondary authentication handling of 4G and 5G subscribers by the SMF-service.

After successful UDM Subscriber-Notification Response, the SMF-service invokes secondary authentication if enabled in the DNN-profile configuration. Currently, only the RADIUS method is supported. It does a sync-wait for RADIUS-response and continues with the PCF Create operation upon successful response. If secondary authentication fails, the subscriber is deleted.

Secondary Authentication