R3303-HP HSR6800 Routers ACL and QoS Configuration Guide

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Configuring HQoS
HQoS overview
Hierarchical Quality of Service (QoS) uniformly manages traffic and hierarchically schedules traffic by
user, network service, and application. It provides more granular traffic control and quality assurance
services than traditional QoS.
HQoS-capable devices can hierarchically classify and schedule traffic, for example, by both user and
application. HQoS guarantees QoS for advanced users and saves the overall networking costs.
HQoS implementation methods
On HSR6800 routers, you can implement HQoS by nesting QoS policies or applying hierarchical CAR
policies to an interface.
Implementing HQoS through nesting QoS policies
Implement HQoS though nesting QoS policies as follows:
• Configure traffic classes to identify different types of packets.
• Configure traffic behaviors with the corresponding actions to be performed for different classes of
packets.
• Associate classes with behaviors in a QoS policy, and apply the QoS policy, typically, to an
interface.
When packets pass an interface with the QoS policy applied, packets are classified into multiple classes
according to the match criteria, and the actions in the corresponding behaviors are performed for these
classes of packets.
You can reference a QoS policy in a traffic behavior to re-classify the traffic class associated with the
behavior and take action on the re-classified traffic as defined in the policy. The QoS policy referenced
in the traffic behavior is called the ”child QoS policy"; the QoS policy that references the behavior is
called the "parent QoS policy".