Cisco Cisco ASR 5000
SGSN Service Configuration Procedures
Configuring the S4-SGSN ▀
SGSN Administration Guide, StarOS Release 18 ▄
Configuring the S4-SGSN
The following configuration steps comprise the required and optional tasks for configuring the S4-SGSN to provide an
interface between GPRS (2.5G) / UMTS (3G) networks and EPC (4G) networks via the EPC S4 interface. This is
referred to as an S4-SGSN.
interface between GPRS (2.5G) / UMTS (3G) networks and EPC (4G) networks via the EPC S4 interface. This is
referred to as an S4-SGSN.
Caution:
The S4-SGSN cannot operate until after 2G, 3G or dual access SGSN service is configured. Do not
begin S4-SGSN configuration until one of those services is configured and operational. Refer to the
, or
for details on configuring those services.
Before you begin the configuration procedure, note the following:
Configuration steps 1 through 5 are mandatory for the S4-SGSN to operate properly.
Configuration steps 6 through 15 are optional. They can be used to configure or enable various optional
functionality and features, including:
Bypass DNS resolution for various network elements
Configure GUTI-to-RAI mapping
Configure operator-specific QoS mapping values
Configure the S13’ interface for the Mobile Equipment Identity (MEI) check
Configure the license-enabled Idle Mode Signaling Reduction feature
Configure the Indirect Data Forwarding Tunnel feature
Step 1
Configure, 2G, 3G or Dual Access SGSN service support. Refer to the
Step 2
Configure and associate the EGTP service. The EGTP service is required to support communication between the SGSN
and the EPC SGW over the S4 interface using the GTPv2 protocol. Refer to the
and the EPC SGW over the S4 interface using the GTPv2 protocol. Refer to the
Step 3
Configure and associate the GTPU service. The GTPU service supports the configured EGTP service by enabling the
sending and receiving of GTP bearer packets from the EPC SGW over the S4 intereface. Refer to the
sending and receiving of GTP bearer packets from the EPC SGW over the S4 intereface. Refer to the
Step 4
Configure DNS for APN resolution. Configurables must be set to enable the default DNS client on the SGSN to resolve
EPC PGW and SGW addresses. Refer to the
EPC PGW and SGW addresses. Refer to the
procedure.
Step 5
Configure the S6d Diameter Interface. The S6d interface is used by the SGSN to communicate with the HSS. The HSS
is a master user database that contains all subscription related information, Refer to the
is a master user database that contains all subscription related information, Refer to the
Step 6
Optional. Configure the S13’ (S13 prime) interface. This interface is used to perform Mobile Equipment (ME) identity
check procedure between the SGSN and Equipment Identity Registry. Refer to the
check procedure between the SGSN and Equipment Identity Registry. Refer to the