Cisco ASR 5x00 Administration Manual page 36

▀ Network Deployment(s)
Gx Interface
This signalling interface supports the transfer of policy control and charging rules information (QoS) between the Policy
and Charging Enforcement Function (PCEF) on the P-GW and a Policy and Charging Rules Function (PCRF) server
(3GPP TS 23.401).
Supported protocols:
 Transport Layer: TCP, SCTP
 Network Layer: IPv4, IPv6
 Data Link Layer: ARP
 Physical Layer: Ethernet
For more information on the Gx interface, refer to
Features and Functionality - Base Software section of this chapter.
Rf Interface
The Rf reference interface enables offline accounting functions on the P-GW in accordance with 3GPP Release 8 and
Release 9 specifications. The P-GW collects charging information for each mobile subscriber UE pertaining to the radio
network usage.
Supported protocols:
 Transport Layer: TCP
 Network Layer: IPv4, IPv6
 Data Link Layer: ARP
 Physical Layer: Ethernet
For more information on Rf accounting, refer to the section in the Features and Functionality - Base Software section of
this chapter.
Gy Interface
▄ Cisco ASR 5x00 Packet Data Network Gateway Administration Guide
36
Dynamic Policy Charging Control (Gx Reference Interface)
PDN Gateway Overview
in the