| .. |
| SPDX-FileCopyrightText: © 2020 Open Networking Foundation <support@opennetworking.org> |
| SPDX-License-Identifier: Apache-2.0 |
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| .. _design_smf: |
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| SMF Design Overview |
| =================== |
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| .. image:: ../_static/images/CN-SMF.png |
| :width: 500px |
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| UPF-Adapter |
| ----------- |
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| As UPF may not support connections from multiple SMF instances with same Node-Id, |
| UPF-Adapter layer has been introduced. |
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| * UPF-Adapter acts like Mux-Demux for PFCP messages between multiple SMF instances and UPF. |
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| * SMF sends custom PFCP msg to UPF-Adapter if UPF-Adapter is deployed. |
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| * The UPF-Adapter intercepts and modifies certain fields before sending PFCP msg to actual UPF. |
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| * Similar handling is done for the response from UPF towards SMF. |
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