Ipswitch WhatsUp Gold User Guide - Ipswitch Documentation Server

Ipswitch WhatsUp Gold User Guide
About CBQoS
Class-based quality of service (CBQoS) is the ability of a network to provide improved services
to identified classes of network traffic. These services include supporting dedicated
bandwidth, improving loss characteristics, managing network congestion, traffic shaping and
setting traffic priorities. CBQoS involves two major components, traffic classes, and traffic
policies.
Traffic classes
In the classification of network traffic, a traffic descriptor categorizes a packet as belonging to
a group or class. By classifying network traffic, you can divide it into multiple priority levels or
classes of service. Traffic classes are created using the class-map command which maps
protocols and applications to a particular class.
Traffic policies
A traffic policy provides the mapping between the classes and the network controls used to
provide the traffic priority, bandwidth guarantee, traffic shaping and other services available
to traffic classes. Traffic policies are created using the policy-map command and are
assigned to a particular interface using the service-policy command.
Configuring CBQoS on a Cisco device
To configure class-based QoS (CBQoS) on a Cisco device, perform the following tasks:
Create the traffic classes using the class-map command
Create the traffic policy using the policy-map command
Attach the traffic policy to an interface using the service-policy command.
Note: The following procedures illustrate how to create a traffic class, how to create a traffic
policy and how to attach the policy to an interface. The specific commands used to illustrate
how these steps may be accomplished on a Cisco router are only for the purposes of this
example. For more detailed information on how to implement QoS for your network, see
Creating a Traffic Policy in the Cisco IOS Quality of Service Solutions Configuration Guide
(http://www.cisco.com/en/US/docs/ios/12_2/qos/configuration/guide/fqos_c.html).
To create a traffic class:
1 Enable the privileged EXEC mode and enter the global configuration mode.
Router> enable
Router# configure terminal
984