Cisco ASR 5000 series Product Overview page 513

PDN Gateway Overview
Transport Layer: UDP, TCP
Tunneling:
Network Layer: IPv4, IPv6
Data Link Layer: ARP
Physical Layer: Ethernet
S-GW
Transport
IPv4 / IPv6
GTP-C/U
UDP
IPv4 / IPv6
L1/L2
S2a Interface
This reference point supports the bearer interface by providing signaling and mobility support between a trusted non-
3GPP access point (HSGW) and the PDN Gateway. It is based on Proxy Mobile IP but also supports Client Mobile IPv4
FA mode which allows connectivity to trusted non-3GPP IP access points that do not support PMIP.
Supported protocols:
Transport Layer: UDP, TCP
Tunneling: GRE IPv6
Network Layer: IPv4, IPv6
Data Link Layer: ARP
Physical Layer: Ethernet
OL-22938-02
GTP: IPv4 or IPv6 GTP-C (signaling channel) and GTP-U (bearer channel)
S5/S8 (GTP) P-GW
Transport
IPv4 / IPv6
GTP-C/U
UDP
IPv4 / IPv6
L1/L2
Network Deployment(s) ▀
Cisco ASR 5000 Series Product Overview ▄