QoS aspects for subscribers and hosts can be defined statically on a SAP or dynamically using.
ESM, for example, in a VLAN-per-service model, different services belonging to a single subscriber are split over different SAPs, and therefore the overall QoS (such as a scheduler policy) of this subscriber must be assigned using Enhanced Subscriber Management.
QoS parameters are shared among the subscriber profile and SLA profile as follows:
The subscriber profile refers to HQoS ingress and egress scheduler policies which define the overall treatment for hosts of this subscriber when queues are used, or policers managed by HQoS are used at egress. If the subscriber is using policers, the subscriber profile also refers to CFHP ingress and egress policer-control-policies which define the overall treatment for hosts of this subscriber.
The SLA profile refers to specific queue or policer settings for each host (BTV, VoIP, PC) using SAP ingress and SAP egress QoS policies. The SLA profile can also refer to an egress HQoS scheduler policy which defines the scheduling from the queues of the related host.
The primary use of the subscriber profile is to define the ingress and egress scheduler policies and policer control policies used to govern the aggregate SLA for all hosts associated with a subscriber. To be effective, the queues or policers defined in the SLA profile’s QoS policies references a scheduler or arbiter from the scheduler policy or policer-control-policy respectively as their parent.