Limitations and Restrictions
During inter-plmn mobility, H-SMF or SMF has the following limitations:
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Does not reselect operator policy and the UPF.
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Northbound NF selection criteria do not change.
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Changes roaming status from/to homer/roamer
During inter-plmn mobility, V-SMF has the following limitations:
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Selects operator policy based on the subscriber policy configuration
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V-UPF and V-CHF are selected based on configuration.
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Roaming-status configured under the Operator policy is used to override the HRT roaming request to treat the UE as LBO.
Restrictions
SMF has the following restrictions:
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Intra-PLMN mobility where UE moves from one V-SMF to another in V-PLMN, V-SMF change is not supported.
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IDFT is not supported for Inter-plmn HO.
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If the inter-plmn CLI is not configured, ModifyBearerRequest with visitor PLMN is rejected.
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For inter-plmn scenarios, the Roaming QOS flow based charging profile configured in the H-SMF is given priority and the one received from the V-SMF is ignored.