Cisco Cisco ASR 5000
SGSN Service Configuration Procedures
Dual Access SGSN Service Configuration ▀
SGSN Administration Guide, StarOS Release 18 ▄
Dual Access SGSN Service Configuration
The following configuration steps must be completed to allow the SGSN to operate in both GPRS (2.5G) and UMTS
(3G) networks. This type of co-location is referred to as dual access.
(3G) networks. This type of co-location is referred to as dual access.
To configure dual access requires a combination of steps from both the 2.5G and 3G configuration procedures:
Step 1
Create the contexts needed. Refer to the System Element Configuration Procedures chapter in the System
Administration Guide.
Administration Guide.
Step 2
Create any interfaces needed in the appropriate context refer to the System Element Configuration Procedures chapter in
the System Administration Guide.
the System Administration Guide.
Step a
For IP (broadcast Ethernet) interfaces, refer to Creating and Configuring Ethernet Interfaces and
Ports in the System Administration Guide.
Step b
For ATM interfaces (3G) refer to Creating and Configuring ATM Interfaces and Ports in the
System Administration Guide.
Step c
For Frame Relay interfaces (2.5G) refer to Creating and Configuring Frame Relay Interfaces and
Ports in the System Administration Guide.
Step 3
Configure SS7 routing domains. The SS7 routing domain is a non-standard, proprietary SS7 concept specific to this
platform. SS7 routing domains provide a combined configuration for the SS7 links, linksets, and related parameters for
SS7 connectivity resources for an SGSN service. SS7 routing domain configurations are common to both SIGTRAN
and MTP3-B networks. Use the procedure in
platform. SS7 routing domains provide a combined configuration for the SS7 links, linksets, and related parameters for
SS7 connectivity resources for an SGSN service. SS7 routing domain configurations are common to both SIGTRAN
and MTP3-B networks. Use the procedure in
Step 4
Configure global title translations (GTT). The GTT configuration is used to set rules for GTT and to define the GTT
databases. Follow the procedure in
databases. Follow the procedure in
Step 5
Configure SCCP networks. The SCCP network (layer) provides services to protocol layers higher in the SS7 protocol
stack, for example RANAP and TCAP. The SCCP layer is also responsible for GTT (step 4) and every SS7 routing
domain (step 3) will be associated with an SCCP network. Use the procedure in
stack, for example RANAP and TCAP. The SCCP layer is also responsible for GTT (step 4) and every SS7 routing
domain (step 3) will be associated with an SCCP network. Use the procedure in
Step 6
Configure MAP services. The MAP service configuration is used by the SGSN service to communicate with many of
the nodes in the SS7 network, such as the HLR, EIR, GSM-SCF, GMLC and SMS-GMSC/SMS-IWMSC. Having an
isolated MAP configuration enables different application services to use the MAP service to communicate with other
MAP entities in the network. Use the procedure in
the nodes in the SS7 network, such as the HLR, EIR, GSM-SCF, GMLC and SMS-GMSC/SMS-IWMSC. Having an
isolated MAP configuration enables different application services to use the MAP service to communicate with other
MAP entities in the network. Use the procedure in
Step 7
Configure IuPS services. A set of parameters define the communication path between the SGSN service and radio
network controllers (RNCs) in a UMTS IuPS service. Use the procedure in
network controllers (RNCs) in a UMTS IuPS service. Use the procedure in
Step 8
Configure SGTP services. The SGTP service configures the parameters used for GTP Tunneling. At a minimum,
interfaces for GTP-C and GTP-U must be configured. Use the procedure in
interfaces for GTP-C and GTP-U must be configured. Use the procedure in
Step 9
Configure the GPRS service. All of the parameters needed for the system to perform as a an SGSN in a GPRS network
are configured in the GPRS service. The GPRS service uses other service configurations, such as SGTP (sgtp-service)
and MAP (map-service) to communicate with other network entities and setup communications between the BSS and
the GGSN. Use the procedure in
are configured in the GPRS service. The GPRS service uses other service configurations, such as SGTP (sgtp-service)
and MAP (map-service) to communicate with other network entities and setup communications between the BSS and
the GGSN. Use the procedure in
Step 10 Configure the Network Service Entity Instance. This identifies the NSEI to use and associates it with a Network Service