PFCP
Packet Forwarding Control Protocol (PFCP) is a 3GPP protocol, used on Sx and N4 links, to allow communication between the Control and User plane. It transfers information and forwarding rules between those two planes.
Available to all SRX running 12.3X48+
Available to all MX running 20.2R1+
Available to all vSRX running 20.3R1+