GTP-U User Plane Function (UPF) based on VPP

Note: Upstream VPP README can be found here

The UPF plugins implements a GTP-U user plane based on 3GPP TS 23.214 and 3GPP TS 29.244 Release 15.

Current State

This UPF implementation is used in production in conjuction with erGW as GGSN/PGW in multiple installation in several telecom operators (Tier 1 and smaller).

Working features

• PFCP protocol
  • en/decoding of most IEs
  • heartbeat
  • node related messages
  • session related messages
• Uplink and Downlink Packet Detection Rules (PDR) and Forward Action Rules (FAR) -- (some parts)
• IPv4 -- inner and outer
• IPv6 -- inner and outer
• Usage Reporting Rules (URR)
• PFCP Session Reports
• Linked Usage Reports

No yet working

• Buffer Action Rules (BAR)
• QoS Enforcement Rule (QER)

Limitations

• FAR action with destination LI are not implemented
• Ethernet bearer support

General limitations and known deficits

• Error handling in Sx procedures is weak