Cisco Cisco Packet Data Gateway (PDG) Dépliant
MME Service Configuration Mode Commands
policy inter-rat ▀
Cisco ASR 5x00 Command Line Interface Reference ▄
6969
policy inter-rat
Configures inter-RAT policy settings.
Product
MME
Privilege
Administrator
Mode
Exec > Global Configuration > Context Configuration > MME Service
configure > context context_name > mme-service service_name
Entering the above command sequence results in the following prompt:
[context_name]host_name(config-mme-service)#
Syntax
policy inter-rat { ignore-sgsn-context-id | indirect-forwarding-tunnels always | select-
topologic-sgw }
topologic-sgw }
no policy inter-rat { ignore-sgsn-context-id | indirect-forwarding-tunnels | select-
topologic-sgw }
topologic-sgw }
no
Disables the function.
ignore-sgsn-context-id
Configures the MME to ignore any Context-ID mismatch between HSS and HLR and to use the Context-ID
from the HSS to override the Context-ID from the source SGSN. If this option is disabled (default), the MME
will drop the PDN when there is a Context-ID mismatch.
from the HSS to override the Context-ID from the source SGSN. If this option is disabled (default), the MME
will drop the PDN when there is a Context-ID mismatch.
indirect-forwarding-tunnels always
Enables establishment of Indirect Data Forwarding Tunnels (IDFT) for Gn/Gp-based Serving Radio Network
Subsystem (SRNS) relocations. By default, the MME is configured to never establish IDFT.
Subsystem (SRNS) relocations. By default, the MME is configured to never establish IDFT.
select-topologic-sgw interface gn
Configures the MME to select the S-GW based on topological closeness to the P-GW for Gn/Gp handoff
scenarios. Weighted distribution will occur across node pairs in the same degree and same order. By default
this functionality is disabled.
During inter-RAT Gn/Gp based handoffs, the MME does not learn the P-GW host name from the old Gn/Gp
SGSN as part of UE context. Without the P-GW host name, selection of the topologically closest S-GW is not
possible per 3GPP standards. This functionality enables the MME to use a proprietary mechanism for
learning the P-GW host name. For S3 & S10 cases, there is no need to enable this command, as GTPv2
allows the P-GW host name to be communicated to/from S4-SGSN/MME.
This functionality requires the
scenarios. Weighted distribution will occur across node pairs in the same degree and same order. By default
this functionality is disabled.
During inter-RAT Gn/Gp based handoffs, the MME does not learn the P-GW host name from the old Gn/Gp
SGSN as part of UE context. Without the P-GW host name, selection of the topologically closest S-GW is not
possible per 3GPP standards. This functionality enables the MME to use a proprietary mechanism for
learning the P-GW host name. For S3 & S10 cases, there is no need to enable this command, as GTPv2
allows the P-GW host name to be communicated to/from S4-SGSN/MME.
This functionality requires the
gw-selection co-location
or
gw-selection topology
commands to
be enabled in the call-control-profile mode.