Cisco Cisco ASR 5700
SGSN Service Configuration Mode Commands
▀ qos-modification
▄ Command Line Interface Reference, StarOS Release 17
8554
qos-modification
This command provides the operator the flexibility to control RAB setup and negotiations based on the RNC.
Product
SGSN
Privilege
Security Administrator, Administrator
Mode
Exec > Global Configuration > Context Configuration > SGSN Service Configuration
configure > context context_name > sgsn-service service_name
Entering the above command sequence results in the following prompt:
[context_name]host_name(config-sgsn-service)#
Syntax
qos-modification { inform-rnc-before-ue | allow-s4-rab-negotiation [inform-pgw]}
no qos-modification [ inform-rnc-before-ue | allow-s4-rab-negotiation [inform-pgw]]
no
The SGSN uses the default behavior
to inform the UE before the RNC or
to reject PDP Context Activation (in compliance with TS 23.00 section 9.2.2.1A), if the RNC negotiates
QoS in the RAB assignment response when the S4 interface is used for the PDP context.
inform-rnc-before-ue
When this keyword is used the SGSN informs the RNC of new QoS before informing the UE. On execution
of the command with this keyword, the SGSN initiates a RAB assignment to inform the RNC followed by
UPCQ towards the GGSN / Modify towards the UE based on whether or not the RNC downgrades the QoS.
of the command with this keyword, the SGSN initiates a RAB assignment to inform the RNC followed by
UPCQ towards the GGSN / Modify towards the UE based on whether or not the RNC downgrades the QoS.
allow-s4-rab-negotiation
With this keyword used as part of the configuration, if the S4 interface is used for PDP activation then the
SGSN locally accepts what the RNC sends as QoS in the RAB Assigment Response and sends that QoS in
the Activate Response.
This CLI is applicable only for PDP activation. For any other scenario, if the RNC negotiates the QoS then
the SGSN ignores this configuration and locally accepts the change and continues with the call.
SGSN locally accepts what the RNC sends as QoS in the RAB Assigment Response and sends that QoS in
the Activate Response.
This CLI is applicable only for PDP activation. For any other scenario, if the RNC negotiates the QoS then
the SGSN ignores this configuration and locally accepts the change and continues with the call.
inform-pgw
This CLI option is used to enable or disable sending of Modify Bearer Command to the PGW. By default this option is
disabled. When this option is enabled, the S4-SGSN triggers a Modify Bearer Command if QoS is downgraded by the
RNC in RAB Assignment Procedure. To avoid looping of messages between S4-SGSN and PGW, PCRF should be
configured to "NOT" upgrade QoS when RAT-Type is 3G.
disabled. When this option is enabled, the S4-SGSN triggers a Modify Bearer Command if QoS is downgraded by the
RNC in RAB Assignment Procedure. To avoid looping of messages between S4-SGSN and PGW, PCRF should be
configured to "NOT" upgrade QoS when RAT-Type is 3G.