Information About Modular Quality Of Service On Cisco Asr 9000 Series Routers; Benefits Of Cisco Asr 9000 Series Router Qos Features; Qos Techniques On Cisco Asr 9000 Series Routers; Packet Classification Congestion Management Congestion Avoidance - Cisco ASR 9000 Series Configuration Manual

Information About Modular Quality of Service on Cisco ASR 9000 Series Routers

Information About Modular Quality of Service on
Cisco ASR 9000 Series Routers
Before configuring modular QoS on your network, you should understand the following concepts:
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Benefits of Cisco ASR 9000 Series Router QoS Features

Cisco IOS XR QoS features enable networks to control and predictably service a variety of networked
applications and traffic types. Implementing Cisco IOS XR QoS in your network promotes the following
benefits:
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QoS Techniques on Cisco ASR 9000 Series Routers

QoS on Cisco IOS XR software relies on the following techniques to provide for end-to-end QoS
delivery across a heterogeneous network:
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Before implementing the QoS features for these techniques, you should identify and evaluate the traffic
characteristics of your network because not all techniques are appropriate for your network environment.
Cisco ASR 9000 Series Aggregation Services Router Modular Quality of Service Configuration Guide
QC-2
D r a f t — C i s c o C o n f i d e n t i a l
Benefits of Cisco ASR 9000 Series Router QoS Features, page 2
QoS Techniques on Cisco ASR 9000 Series Routers, page 2
Differentiated Service Model for Cisco IOS XR Software, page 4
Access Node Control Protocol, page 4
Control over resources. You have control over which resources (bandwidth, equipment, wide-area
facilities, and so on) are being used. For example, you can limit bandwidth consumed over a
backbone link by FTP transfers or give priority to an important database access.
Tailored services. If you are an Internet Service Provider (ISP), the control and visibility provided
by QoS enables you to offer carefully tailored grades of service differentiation to your customers.
Coexistence of mission-critical applications. Cisco IOS XR QoS features make certain of the
following conditions:
– That your WAN is used efficiently by mission-critical applications that are most important to
your business.
– That bandwidth and minimum delays required by time-sensitive multimedia and voice
applications are available.
That other applications using the link get their fair service without interfering with
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mission-critical traffic.
Packet classification
Congestion management
Congestion avoidance
Modular Quality of Service Overview on Cisco ASR 9000 Series Routers
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