Deleting the UPF

This section describes the sequence of operations for deleting an existing UPF.

  1. To delete an existing UPF, it is first marked "offline".

    Run the appropriate CLI commands to manually clear the sessions.

  2. The NodeMgr notifies IPAM about the UPF removal.

  3. IPAM moves the static address ranges from all DNNs of the removed UPF to other available UPFs.

  4. The Nodemgr initiates ReleaseUpf to IPAM. IPAM releases dynamic address ranges to the free list.

  5. The Nodemgr sends an N4 Association Release message to UPF and to clean up 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.