Limitations and Restrictions

The SMF has the following limitations:

  • The SMF supports only single RADIUS attribute profile, and does not support dictionary selection.

  • If RADIUS accounting is enabled and server-group is configured within DNN profile, the SMF sends server-group as AAA group in charging-params in N4 session establishment. The UPF displays an error if there is a server group mismatch between SMF and UPF.

    In this scenario, static and predefined usage are not accounted in the RADIUS URR. However, the dynamic rules traffic is accounted in the RADIUS URR.

  • Currently, VLAN tagging for outbound RADIUS packets is based on the static routes configured on SMF. So, the overlapping AAA server addresses for different MVNOs where the VLAN tag must be different from SMF is not supported.