A scheduler policy can be applied either on a SAP (see Figure: Scheduler policy on SAP and scheduler hierarchy creation) or on a multiservice customer site (a group of SAPs with common origination/termination point) (see Figure: Scheduler policy on customer site and scheduler hierarchy creation). Whenever a scheduler policy is applied, the individual schedulers comprising the policy are created on the object. When the object is an individual SAP, only policers and queues created on that SAP can use the schedulers created by the policy association. When the object is a multiservice customer site, the schedulers are available to any SAPs associated with the site (also see Scheduler policies applied to SAPs).
Queues and policers become associated with schedulers when the parent scheduler name is defined within the policer or queue definition in the SAP QoS policy. The scheduler is used to provide bandwidth to the queue relative to the operating constraints imposed by the scheduler hierarchy.