Subscriber Services: Usage monitoring for subscribers

Junos OS can monitor the volume of traffic and the amount of time that a subscriber uses during a session if that subscriber's policy control rules are controlled by a policy and charging rules function (PCRF) server. The PCRF initiates this monitoring, and devices sends the reports to the PCRF. Monitoring can take place for the entire subscriber session or for only specific data flows and applications. The PCRF provides threshold values to indicate when the Service Control Gateway sends a report to the PCRF, or the PCRF can request a report at any time.