Deleting the UPF
This section describes the sequence of operation for deleting an existing UPF.
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To delete an existing UPF, first it is marked "offline".
Run the appropriate CLI commands to manually clear the sessions.
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The NodeMgr notifies IPAM about the UPF removal.
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IPAM moves the static address ranges from all DNNs of the removed UPF to other available UPFs.
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The Nodemgr initiates ReleaseUpf to IPAM. IPAM releases dynamic address-ranges to the free-list.
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The Nodemgr sends an N4-Association-Release message to UPF and to cleanup UPF from the cache.
Note | If the UPF is not marked offline and a manual clean-up is not performed before its removal, the system behavior might be erratic. |