The evaluation of the subscriber monitoring rules happens whenever a new subscriber session is detected (when traffic from a new access IP address is received). The profiles are checked against the subscriber session and a matching rule found, that will specify the rate policy to apply. For efficiency, the profiles are evaluated in the following pre-determined order:

1. Interface
2. VLAN
3. Access

Other profile types cannot be used in subscriber rate rules. For example, Internet profiles and DPI profiles will apply to someof the subscriber applications and not to others. Another example is throughput profile, because the rate rules are evaluated at the start of the subscriber session and the throughput changes continuously.

The decision tree is similar to the tree of subscriber flow rules. It is available in Configuration->Subscriber Monitoring->Rules selecting the tab RULES TREE-VIEW.: