P-Gw Rel. 8 Gx Interface Support; Introduction - Cisco ASR 5000 Administration Manual

▀ Rel. 8 Gx Interface
Statistics/Information
Information, configuration, and statistics of sessions active in IMS
Authorization service.
Complete information, configuration, and statistics of sessions active in
IMS Authorization service.
Summarized information of sessions active in IMS Authorization
service.
Complete statistics for active charging service sessions.
Information for all rule definitions configured in the service.
Information for all rulebases configured in the system.
Information on all group of ruledefs configured in the system.
Information on policy gate counters and status.

P-GW Rel. 8 Gx Interface Support

Introduction

The Gx reference point is located between the Policy and Charging Rules Function (PCRF) and the Policy and Charging
Enforcement Function (PCEF) on the Packet Data Network (PDN) Gateway (P-GW). The Gx reference point is used for
provisioning and removal of PCC rules from the PCRF to the PCEF and the transmission of traffic plane events from
the PCEF to the PCRF. The Gx reference point can be used for charging control, policy control, or both, by applying
AVPs relevant to the application.
The PCEF is the functional element that encompasses policy enforcement and flow based charging functionality. This
functional entity is located at the P-GW. The main functions include:
 Control over the user plane traffic handling at the gateway and its QoS.
 Service data flow detection and counting, as well as online and offline charging interactions.
 For a service data flow that is under policy control, the PCEF shall allow the service data flow to pass through
the gateway if and only if the corresponding gate is open.
 For a service data flow that is under charging control, the PCEF shall allow the service data flow to pass through
the gateway if and only if there is a corresponding active PCC rule and, for online charging, the OCS has
authorized the applicable credit with that charging key.
 If requested by the PCRF, the PCEF shall report to the PCRF when the status of the related service data flow
changes.
 In case the SDF is tunnelled at the BBERF, the PCEF shall inform the PCRF about the mobility protocol
tunnelling header of the service data flows at IP-CAN session establishment.
▄ Cisco ASR 5000 IP Services Gateway Administration Guide
92
Action to perform
show ims-authorization sessions all
show ims-authorization sessions full
show ims-authorization sessions summary
show active-charging sessions full
show active-charging ruledef all
show active-charging rulebase all
show active-charging group-of-ruledefs
all
show ims-authorization policy-gate {
counters | status }
This command is no longer an option in StarOS release
11.0 and beyond.
Gx Interface Support
OL-27210-02