Policer control policies

General Information

Policer control policies allow you to create a control framework, under which policer objects associated with SAPs or subscriber contexts are configured with traffic control parameters. The policer object is applied to the SAP or subscriber context as part of an access ingress policy or access egress policy. The policer control policy is also applied to the SAP or subscriber context. The policer control policy provides the control framework, and policers are associated with the framework by means of arbiters.

When a policer control policy is applied to a SAP or subscriber context, the system creates a parent policer that is bandwidth limited by the policy's maximum bandwidth rate, as defined under the root arbiter. In addition to the root arbiter, the policy may also contain user defined child arbiters that provide bandwidth control for subsets of child policers.

Figure 50-3: Policer association with SAPs and user contexts under policer control hierarchy

A policer is created as part of an access ingress or access egress policy. The policer is configured with a parent arbiter name. When a policy containing a policer is applied to a SAP, the system scans the available arbiters on the SAP. If an arbiter exists with a name that matches the Parent Arbiter parameter on the policer, a policer to arbiter association is established and the policer becomes part of the policer control hierarchy.

In the case of subscriber contexts, the policer control policy is applied to the sub profile used by the subscriber. The system creates a unique policer control hierarchy for each subscriber associated with the sub profile. An access ingress or access egress policy containing a policer is applied to the subscriber SLA profile. The combination of the sub profile and SLA profile at the subscriber level provides the system with the information required to create the policer control hierarchy instance for the subscriber context.

Workflow to configure policer control hierarchy describes the high-level steps to configure a policer control hierarchy.