Cisco ASR 5000 Series User Manual

Serving GPRS Support Node (SGSN) Overview
▀ Network Deployments and Interfaces
▄ Cisco ASR 5000 Series Product Overview
OL-22938-02
GTPv0 and GTPv1, with the capability to auto-negotiate the version to be used with any particular peer
GTP-C (control plane) and GTP-U (user plane)
Transport over ATM/STM-1Optical, Fast Ethernet, and Ethernet 1000 line cards/QGLCs)
One or more Gn/Gp interfaces configured per system context
As well, the SGSN can support the following IEs from later version standards:
IMEI-SV
RAT TYPE
User Location Information
Gr: This is the interface to the HLR. It supports SIGTRAN (M3UA/SCTP/IP) over Ethernet.
Some of the procedures supported by the SGSN on this interface are:
Send Authentication Info
Update Location
Insert Subscriber Data
Delete Subscriber Data
Cancel Location
Purge
Reset
Ready for SM Notification
SIGTRAN based interfaces M3UA/SCTP
Peer connectivity can be through an intermediate SGP or directly depending on whether the peer (HLR,
EIR, SMSC, GMLC) is SIGTRAN enabled or not
SCTP Multi-Homing supported to facilitate network resiliency
M3UA operates in ASP & IPSP client/server and single/double-ended modes
Multiple load shared M3UA ASP instances for high-performance and redundancy
Works over Ethernet (IPoA) interface
Ga: The SGSN uses the Ga interface with GTP Prime (GTPP) to communicate with the charging gateway (CG,
also known as CGF) and/or the GTPP Storage Server (GSS). The interface transport layer is typically UDP
over IP but can be configured as TCP over IP for:
One or more Ga interfaces per system context, and
An interface over Ethernet 10/100 or Ethernet 1000 interfaces
The charging gateway handles buffering and pre-processing of billing records and the GSS provides storage for
Charging Data Records (CDRs). For additional information regarding SGSN charging, refer to the Charging
section.
Gd: This is the interface between the SGSN and the SMS Gateway (SMS-GMSC / SMS-IWMSC) for both 2G
and 3G technologies through multiple interface mediums. Implementation of the Gd interface requires
purchase of an additional license.

Cisco ASR 5000 Series Specifications

General

Brand	Cisco
Model	ASR 5000 Series
Category	Network Router
Language	English