Cisco Cisco ASR 5000

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Supported protocols:
• Transport Layer: UDP, TCP
• Tunneling: GRE
• Network Layer: IPv4, IPv6
• Data Link Layer: ARP
• Physical Layer: Ethernet
STa Interface
This signaling interface supports Diameter transactions between a 3GPP2 AAA proxy and a 3GPP AAA
server. This interface is used for UE authentication and authorization.
Supported protocols:
• Transport Layer: TCP, SCTP
• Network Layer: IPv4, IPv6
• Data Link Layer: ARP
• Physical Layer: Ethernet
Gxa Interface
This signalling interface supports the transfer of policy control information (QoS) between the HSGW (BBERF)
and a PCRF.
   HSGW Administration Guide, StarOS Release 19
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HRPD Serving Gateway Overview
HRPD Serving Gateway in an eHRPD Network