Cisco Cisco ASR 5000
SGSN Service Configuration Procedures
▀ Configuring the S4-SGSN
▄ SGSN Administration Guide, StarOS Release 18
Step 7
Optional. Configure operator-specific QoS mapping between EPC elements and the SGSN. The S4-SGSN
communicates QoS parameters towards the SGW/ PGW and EPC UEs in different formats. Operators must configure
the SGSN quality of service (QoS) parameters as a call-control-profile that will ensure proper QoS mapping between
the S4-SGSN, SGW/PGW and UEs. Refer to the
communicates QoS parameters towards the SGW/ PGW and EPC UEs in different formats. Operators must configure
the SGSN quality of service (QoS) parameters as a call-control-profile that will ensure proper QoS mapping between
the S4-SGSN, SGW/PGW and UEs. Refer to the
Step 8
Optional. Configure the interface type used by the S4-SGSN to communicate with the peer SGSN. Refer to the
Step 9
Optional. Configure Gn interface selection for EPC-capable UEs based on an operator policy. When the EGTP service
is configured, the SGSN, by default, selects the S4 interface for 1) EPC capable UEs and 2) non-EPC capable UEs that
have an EPS subscription only. However, operators have the option to forcefully select the Gn interface for both types
of UEs. Refer to the
is configured, the SGSN, by default, selects the S4 interface for 1) EPC capable UEs and 2) non-EPC capable UEs that
have an EPS subscription only. However, operators have the option to forcefully select the Gn interface for both types
of UEs. Refer to the
Step 10 Optional. Configure a custom MME group ID. For operators who are using LAC ranges between 32768 and 65535 in
UMTS/GPRS deployments, rather than for MMEs in LTE deployments, the SGSN provides a workaround to ensure
backward compatibility. Refer to the
backward compatibility. Refer to the
Step 11 Optional. Configure the S-GW for a RAI. If operators wish to bypass DNS resolution for obtaining the EPC S-GW
address, the S4-SGSN can select a locally configured S-GW by performing a local look-up for the current RAI. Refer to
the
the
Step 12 Optional. Configure a Local PGW Address. For operators who wish to bypass DNS resolving an EPC P-GW address,
the SGSN can be configured with a local P-GW address as part of an APN profile. Refer to the
Step 13 Optional. Configure the peer MME address. If operators wish to bypass DNS to resolve the peer MME address, the
SGSN supports the local configuration of a peer MME address for a given MME group (LAC) and MME code (RAC).
Refer to
Refer to
Step 14 Optional. Configure the Idle Mode Signaling Reduction (ISR) feature. The ISR is a license-enabled feature allows the
UE to roam between LTE and 2G/3G networks while reducing the frequency of TAU and RAU procedures due to the
UE selecting E-UTRAN or UTRAN networks. Refer to the
UE selecting E-UTRAN or UTRAN networks. Refer to the
procedure.
Step 15 Optional. Enable the setup of indirect data forwarding tunnels (IDFT) between the eNodeB and the RNC via the SGW