Managing PCC or ePCC Rules on Routers Running Junos OS and Acting as PCEF
The SRC software acting as PCRF uses the Gx router driver to establish a southbound Gx interface between the SRC software and the MX Series router (that is, Services Control Gateway) acting as PCEF.
The Gx router driver has the following responsibilities:
Manage subscriber sessions signaled by the Services Control Gateway.
Activate or deactivate services as specified by the SAE.
Log out subscribers as specified by the SAE.
Update the SAE with status of new service activations and deactivations.
Notify the SAE when subscribers log out.
The Gx router driver responds to requests from the Services Control Gateway, which signals subscribers logging in and logging out. The driver publishes interface tracking events, performs interface classification to determine any default policies, and initiates SAE subscriber session login and logout processing.
The SRC software provisions static PCC rules, dynamic PCC rules, and dynamic ePCC rules to the Services Control Gateway through the Gx router driver using the PULL or PUSH procedure based on subscriber profile configuration. The PCC and ePCC rules provide the policy control and applicable charging information for a service data flow.
In PUSH procedure (unsolicited provisioning of the rules), the SRC software provisions the rules in the RAR message to the Services Control Gateway without receiving any request from the Services Control Gateway.
In PULL procedure (solicited provisioning of the rules), the SRC software provisions the rules in the CCA message to the Services Control Gateway on receiving a request from the Services Control Gateway.