Cisco Cisco ASR 5000
SGSN in a 2.5G GPRS Network
▀ 2.5G SGSN Configuration Components
▄ SGSN Administration Guide, StarOS Release 18
2.5G SGSN Configuration Components
In order to support 2.5G SGSN functionality, the system must be configured with at least one context for the GPRS
service (2.5G SGSN service). In the example below, the required context has been named “SGSN_Ctx”.
service (2.5G SGSN service). In the example below, the required context has been named “SGSN_Ctx”.
Figure 13. Sample 2.5G SGSN Configuration
The SGSN_Ctx
As indicated, there must be at least one context to contain the service and routing configurations.
Although multiple context can be created, our example configuration uses only one context, named “SGSN_Ctx”, to
contain all of the following configurations:
contain all of the following configurations:
SS7 Routing Domain - SS7 routing is facilitated through the configuration and use of SS7 routing domains. SS7
routing domains group SS7-related configuration parameters. Depending on the SS7 signalling method, an SS7
routing domain may be configured with one of the following:
routing domain may be configured with one of the following:
Linksets - Used for broadband SS7 signalling, linksets are comprised of link ids that specify point
codes for SCCP endpoints. It is important to note that SCCP endpoints are further defined through the