Dynamic IP Pool Provisioning on UPF

The StarOS UPF expects SMF to send the configured IP pool range for assigning the IP address to UE during PDU session creation. The UPF uses this information to install static routes for the entire range of IP addresses and advertises the same. The IP pool range information consists of:

  • Start and end IP address of the pool range

  • VPN context ID in which the pool must be dynamically configured in the UPF.

    The SMF does not have any VPN ID supported in this release. It sends a configured value that also must be configured on the UPF.

  • IP pool chunk ID

    The SMF currently does not break the pool into smaller chunks. Hence, it always sends 1 as the chunk ID.

  • IP pool information

    The pool information is sent to the UPF in an N4 Association Update Request message after the N4 Association Setup Request or Response has been successfully exchanged with UPF and also after the SX Prime PFD Management Request or Response has been exchanged. The Content TLV IE (IE type 206) is used to send this pool information in the N4 Association Update Request.