Supported Logical Network Interfaces (Reference Points) - Cisco ASR 5000 series Product Overview

Serving Gateway Overview

Supported Logical Network Interfaces (Reference Points)

The following figure displays the specific network interface between a Serving Gateway and other E-UTRAN network
devices.
Figure 156. S-GW Interfaces in the E-UTRAN/EPC Network
E-UTRAN
EPC
The S-GW provides the following logical network interfaces in support of the E-UTRAN/EPC network:
S4 Interface
This reference point (not shown in the figure above) provides tunneling and management between the S-GW and an
SGSN.
S5/S8 Interface
This reference point provides tunneling (bearer channel) and management (signaling channel) between the S-GW and
the P-GW. The S8 interface is used for roaming scenarios. The S5 interface is used for non-roaming.
Supported protocols:
Transport Layer: UDP, TCP
OL-22938-02
Signaling Interface
Bearer Interface
eNodeB
MME
S11
S1-U
Gxc
S-GW
S5/S8
Cisco ASR 5000 Series Product Overview ▄
Network Deployment(s) ▀
PCRF
P-GW