Configuring the Core Network Type Restriction

When the UE requests access to a restricted area, the AMF configures the cause code to send to a UE. This restriction can be one of the following:

  • UDM service area restrictions

  • Local configuration-based area code restrictions

To configure this feature, use the following configuration:

config 
    amf-global 
        call-control-policy policy_name 
            core-network-type-restriction 5gc override-udm-restrictions 
            local-cause-code-map rat-type-restriction 5gmm-cause-code { 5GS-services-not-allowed | no-suitable-cells-in-tracking-area | plmn-not-allowed | roaming-not-allowed-in-this-tracking-area | tracking-area-not-allowed | restricted-service-area } 
            end 

NOTES:

  • call-control-policy policy_name —Specify the call control policy name to apply the RatType restriction at AMF.

  • core-network-type-restriction 5gc override-udm-restrictions —When the core network restriction is configured as 5GC, the AMF restricts the 5GC access to subscribers associated with the Call Control Policy. When 5GC is configured with override-udm-restrictions , the AMF ignores the UDM defined restrictions and considers the locally configured restrictions.

  • local-cause-code-map rat-type-restriction 5gmm-cause-code { 5GS-services-not-allowed | no-suitable-cells-in-tracking-area | plmn-not-allowed | roaming-not-allowed-in-this-tracking-area | tracking-area-not-allowed | restricted-service-area } —Specify the 5GMM cause code.