H3C Technologies H3C SecPath F1000-E - Manual (Page 509)

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QoS Configuration
Overview
Introduction to QoS
In data communications, Quality of Service (QoS) is the ability of a network to provide differentiated
service guarantees for diversified traffic regarding bandwidth, delay, jitter, and drop rate.
The network resources are always scarce. Wherever there is contention for resources, there is the
demand for QoS to prioritize important traffic flows over trivial traffic flows. When making a QoS scheme,
a network administrator must plan network resources carefully considering the characteristics of various
applications to balance the interests of diversified users and fully utilize network resources.
The following part introduces the QoS service models, and some mature QoS techniques in wide use.
Appropriately using these techniques in specific environments, you can improve QoS effectively.
QoS Policy
In the web interface, you can implement QoS by applying QoS policies to interfaces. With QoS policies,
you can configure QoS flexibly.
Before configuring a QoS policy, be familiar with these concepts: class, traffic behavior, and policy.
Class
Classes are used to classify traffic.
A class is identified by a class name and contains match criteria for traffic identification. The relationship
between the criteria is AND or OR.
• AND: A packet is considered belonging to a class only when the packet matches all the criteria in
the class.
• OR: A packet is considered belonging to a class if it matches any of the criteria in the class.
A match criterion in a class can be any of the following:
• Access control list (ACL)
• Protocol group
• Source MAC address
• Destination MAC address
• Customer network 802.1p priority
Traffic behavior
A traffic behavior defines a set of QoS actions to take on packets. You can configure the following
actions in a traffic behavior:
• Traffic policing: Regulates the specifications of matched traffic. For more information, see Traffic
Policing .