Cisco ASR 5000 Series Product Overview ▄  
eNodeB S1-U S-GW
L1/L2
GTP-U
IPv4 / IPv6
IPv4 / IPv6
Transport
L1/L2
IPv4 / IPv6
IPv4 / IPv6
Transport
UDP UDP
GTP-U
 
 
S11 Interface 
This reference point provides GTP-C control signal tunneling between the MME and the S-GW. 
Supported protocols: 
 
  Transport Layer: UDP, TCP 
  Tunneling: IPv4 or IPv6 GTP-C (control channel) 
  Network Layer: IPv4, IPv6 
  Data Link Layer: ARP 
  Physical Layer: Ethernet 
 
eNodeB S1-U S-GW
L1/L2
GTP-U
IPv4 / IPv6
IPv4 / IPv6
Transport
L1/L2
IPv4 / IPv6
IPv4 / IPv6
Transport
UDP UDP
GTP-U
 
 
Gxc Interface 
This signaling interface supports the transfer of policy control and charging rules information (QoS) between the Bearer 
Binding and Event Reporting Function (BBERF) on the S-GW and a Policy and Charging Rules Function (PCRF) 
server. 
Supported protocols: