▄ Cisco ASR 5000 Series Product Overview 
P-GW S6b AAA
L1/L2
Diameter
IPv4 / IPv6
L1/L2
IPv4 / IPv6
TCP / SCTP TCP / SCTP
Diameter
 
 
SGi Interface 
This reference point provides connectivity between the P-GW and a packet data network. This interface can provide 
access to a variety of network types including an external public or private PDN and/or an internal IMS service 
provisioning network. 
 
Supported protocols: 
 
  Transport Layer: TCP, UDP 
  Network Layer: IPv4, IPv6 
  Data Link Layer: ARP 
  Physical Layer: Ethernet 
 
P-GW SGi Packet NW
L1/L2
IPv4 / IPv6
L1/L2
IPv4 / IPv6
Transport Transport
 
 
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. 
 
Supported protocols: 
 
  Transport Layer: TCP, SCTP 
  Network Layer: IPv4, IPv6 
  Data Link Layer: ARP 
  Physical Layer: Ethernet