Cisco Cisco ASR 5000
GGSN Service Configuration Mode Commands
gtpc support-earp ▀
Command Line Interface Reference, StarOS Release 18 ▄
5245
gtpc support-earp
Enables Evolved ARP (e-ARP) support for GGSN service on Gn-Gp interface.
Product
GGSN
Privilege
Administrator
Mode
Exec > Global Configuration > Context Configuration > GGSN Service Configuration
Syntax
[ default | no ] gtpc support-earp
no
Ignores E-ARP IE received in CPC/UPC Messages.
default
Sets the E-ARP support behavior to default, or disables the support.
Usage
NRUPC initiated by GGSN/PGW is not responded to by the SGSNs of some vendors where behavior of
SGSN is not compliant to standards. To accommodate SGSN non-compliance, the GGSN/PGW software has
been enhanced with CLI-controlled behavior to suppress sending of the GGSN/PGW-initiated UPC only if
SGSN requested values are less than PCRF authorized bit rates and if the values of the “No QoS Negotiation”
and “Upgrade QoS Supported” flags received in the SGSN-initiated Update Request does not allow
change/upgrade in QoS values in Update Response. By default, this behavior is disabled and it should be
enabled if interoperability issues are seen with the SGSN.
When SGSN informs GGSN that, for a transaction either for Create PDP context Request or Update PDP
Context Request. it(SGSN) does not support QoS-Upgrade and/or QoS-Negotiation, and if GGSN has to
modify(either upgrade or degrade), QoS, then GGSN sends SGSN a response with unchanged QoS. Followed
by the response, GGSN initiates a NRUPC with modified QoS. This is NRUPC for QoS-Change. To honor
common flags suppress NRUPC clis are introduced.
This command suppress NRUPC (for qos-change) sent from GGSN to SGSN under following condition:
SGSN is not compliant to standards. To accommodate SGSN non-compliance, the GGSN/PGW software has
been enhanced with CLI-controlled behavior to suppress sending of the GGSN/PGW-initiated UPC only if
SGSN requested values are less than PCRF authorized bit rates and if the values of the “No QoS Negotiation”
and “Upgrade QoS Supported” flags received in the SGSN-initiated Update Request does not allow
change/upgrade in QoS values in Update Response. By default, this behavior is disabled and it should be
enabled if interoperability issues are seen with the SGSN.
When SGSN informs GGSN that, for a transaction either for Create PDP context Request or Update PDP
Context Request. it(SGSN) does not support QoS-Upgrade and/or QoS-Negotiation, and if GGSN has to
modify(either upgrade or degrade), QoS, then GGSN sends SGSN a response with unchanged QoS. Followed
by the response, GGSN initiates a NRUPC with modified QoS. This is NRUPC for QoS-Change. To honor
common flags suppress NRUPC clis are introduced.
This command suppress NRUPC (for qos-change) sent from GGSN to SGSN under following condition:
When SGSN sends Create PDP Context Request with UQS=0. If Upgrade QoS Supported bit of the
Common Flags IE is set to 0 or the Common Flags IE is absent then the SGSN does not support QoS
upgrade in Response message functionality.
upgrade in Response message functionality.
When SGSN sends Update PDP Context Request with NQN flag = 1.
When SGSN sends Update PDP Context Request QoS Update Support flag = 0
This suppression feature works with a limited functionality as follows:
It works only on MBR and def-eps-qos.
It holds if MBR in CPC/ UPC Request < AMBR authorized by (PCRF/MME).
AMBR is not related to common flags hence no suppression on modification of AMBR.