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PDN Gateway Overview
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.
Gy Interface
The Gy reference interface enables online accounting functions on the P-GW in accordance with 3GPP Release 8 and
Release 9 specifications.
Supported protocols:
Transport Layer: TCP
Network Layer: IPv4, IPv6
Data Link Layer: ARP
Physical Layer: Ethernet
Dynamic Policy Charging Control (Gx Reference Interface)
Cisco ASR 5x00 Packet Data Network Gateway Administration Guide ▄
Network Deployment(s) ▀
in the
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