Benefits Of Quality Of Service Features; Restrictions And Limitations For Quality Of Service; Modular Qos Command-Line Interface - Cisco 10000 Series Configuration Manual

Benefits of Quality of Service Features

Benefits of Quality of Service Features
Quality of service (QoS) features enable you to create differentiated services on your network that you
can use to:
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Restrictions and Limitations for Quality of Service

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Note

Modular QoS Command-Line Interface

To configure QoS features, use the modular quality of service command-line interface (MQC).
For Frame Relay, you can configure QoS features using the:
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Note The router does not support interface-based, legacy QoS commands such as the rate-limit and
traffic-shape interface configuration commands. For information on these commands, see
"Configuring Frame Relay QoS Using Frame Relay Legacy Commands"
The following apply when you configure QoS on Frame Relay:
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Cisco 10000 Series Router Quality of Service Configuration Guide
1-2
Give preferential treatment to different classes of network traffic
Ensure sufficient bandwidth to meet average network loads
Determine the network response during times of congestion
Classify traffic so that different applications or traffic classes receive treatment in accordance with
defined requirements
Ensure adequate resources are allocated so that the network delivers the performance the customer
requires
The ability to apply a QoS feature to an interface does not imply support for all QoS features on the
interface.
The router does not have a limit on the number of interfaces that can have a QoS policy.
Trunk interfaces require multiple flows to achieve line-rate performance at packet sizes smaller than
250 bytes.
A service-policy should not be attached to an interface that has an IP interface session.
A flow consists of IP packets with the same source and destination addresses.
MQC, applied on the physical interface
MQC, applied on point-to-point Frame Relay subinterfaces (Release 12.0(19)SL or later)
Frame Relay QoS command-line interface (CLI)
When you apply a service policy on the physical interface instead of on the individual subinterfaces,
the aggregate traffic from all PVCs is subject to the service policy. This allows you to apply QoS
policies independently of PVCs.
When you apply a service policy on a Frame Relay point-to-point subinterface, only the subinterface
traffic is subject to the service policy.
Chapter 1 Quality of Service Overview
Appendix A,
OL-7433-09