FAR

Technical Explanation

Linked to one or more PDRs, a Forwarding Action Rule (FAR) instructs the UPF what physical action to take: (1) FORW (forward packet with encapsulation/decapsulation to target interface), (2) DROP (discard packet), (3) BUFF (buffer packet and notify SMF for downlink paging), or (4) DUPL (duplicate packet for lawful intercept).

Key Functions

• Instructs UPF whether to Forward, Drop, Buffer, or Duplicate packets
• Specifies GTP-U outer header creation and destination interface parameters
• Buffers downlink packets and triggers Downlink Data Notifications during paging