Cisco ASR 9000 Series Aggregation Services Router Modular Quality of Service Configuration Guide, Release 4.1
Preface
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Table Of Contents

Preface

Changes to This Document

Obtaining Documentation and Submitting a Service Request


Preface


This document describes the Cisco IOS XR Quality of Service (QoS) feature for prioritizing traffic flow and providing preferential forwarding for higher-priority packets. The QoS techniques described include allocating bandwidth, improving loss characteristics, avoiding and managing network congestion, metering network traffic, and setting traffic-flow priorities across the network.

For QoS command descriptions, usage guidelines, and examples, refer to the Cisco ASR 9000 Series Aggregation Services Routers Modular Quality of Service Command Reference.

The preface contains the following sections:

Changes to This Document

Obtaining Documentation and Submitting a Service Request

Changes to This Document

The following table lists the technical changes made to this document.

Table 1 Changes to This Document in Cisco IOS XR 4.1

Revision
Date
Change Summary

OL-24691-01

April, 2011

In the "Configuring Modular QoS Congestion Management" module, added the following feature:

2-rate 3-color (2R3C) policer—This feature includes the conform-color and exceed-color commands. it is applicable to the SIP 700 line cards, ingress side.

In the "Modular QoS Deployment Scenarios" module, added the following feature:

VPLS and VPWS QoS


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