Feature Description

SMF sends the tracing trigger to the selected UPF automatically. Sending the trigger from SMF facilitates in parsing minimum files for troubleshooting across Control Plane and User Plane.

Note
  • The operator can configure a maximum of five subscribers at a time on SMF for monitoring.

  • When the data tracing is enabled, the available VPP, FCAP, and MEH are captured on the UPF PCAP.

  • When the protocol tracing is enabled, the following options are enabled on UPF:

    • Rulematch Events

    • L3 Data

    • PFCP Events Tracing

    • EDR

    • SessMGR

    • Subscriber Summary After Call Disconnect

  • After SMF GR switchover, the existing sessions of the monitored subscribers aren't impacted on UPF. As monitor nf CLI exists in the config mode, an operator needs to configure the CLI on both the SMF instances.

For UPF reload and switchover scenarios, see the UPF troubleshooting guide for monitor NF.

This section provides information on CLI commands for configuring the UPF monitor subscriber from SMF.