Alcatel-Lucent 7950 Quality Of Service Manual

Alcatel-Lucent 7950

EXTENSIBLE ROUTING SYSTEM | RELEASE 13.0.R1

QUALITY OF SERVICE GUIDE

Alcatel-Lucent – Proprietary & Confidential

Contains proprietary/trade secret information which is the property of Alcatel-Lucent. Not to be made available

to, or copied or used by anyone who is not an employee of Alcatel-Lucent except when there is a valid non-

disclosure agreement in place which covers such information and contains appropriate non-disclosure and

limited use obligations.

All specifications, procedures, and information in this document are subject to change and revision at any time

without notice. The information contained herein is believed to be accurate as of the date of publication. Alcatel-

Lucent provides no warranty, express or implied, regarding its contents. Users are fully responsible for application

or use of the documentation.

Alcatel, Lucent, Alcatel-Lucent and the Alcatel-Lucent logo are trademarks of Alcatel-Lucent. All other trademarks

are the property of their respective owners.

Disclaimers

Alcatel-Lucent products are intended for commercial uses. Without the appropriate network design engineering,

they must not be sold, licensed or otherwise distributed for use in any hazardous environments requiring fail-safe

performance, such as in the operation of nuclear facilities, aircraft navigation or communication systems, air traffic

control, direct life-support machines, or weapons systems, in which the failure of products could lead directly to

death, personal injury, or severe physical or environmental damage. The customer hereby agrees that the use, sale,

license or other distribution of the products for any such application without the prior written consent of

Alcatel-Lucent, shall be at the customer's sole risk. The customer hereby agrees to defend and hold Alcatel-Lucent

harmless from any claims for loss, cost, damage, expense or liability that may arise out of or in connection with the

use, sale, license or other distribution of the products in such applications.

This document may contain information regarding the use and installation of non-Alcatel-Lucent products. Please

note that this information is provided as a courtesy to assist you. While Alcatel-Lucent tries to ensure that this

information accurately reflects information provided by the supplier, please refer to the materials provided with any

non-Alcatel-Lucent product and contact the supplier for confirmation. Alcatel-Lucent assumes no responsibility or

liability for incorrect or incomplete information provided about non-Alcatel-Lucent products.

However, this does not constitute a representation or warranty. The warranties provided for Alcatel-Lucent products,

if any, are set forth in contractual documentation entered into by Alcatel-Lucent and its customers.

This document was originally written in English. If there is any conflict or inconsistency between the English

version and any other version of a document, the English version shall prevail.

7950 XRS Quality of Service Guide Page 3

Table of Contents

Preface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13

About This Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13

Audience . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13

List of Technical Publications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14

Technical Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15

Getting Started

In This Chapter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17

Alcatel-Lucent Services Configuration Process. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18

QoS Policies

In This Chapter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19

QoS Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20

QoS Policies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21

Service and Network QoS Policies. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24

Network QoS Policies. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25

Network Queue QoS Policies. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27

Queue Parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30

Service Ingress QoS Policies. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38

Egress Forwarding Class Override . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44

Service Egress QoS Policies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44

Policy Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .52

Scheduler Policies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54

Forwarding Classes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .64

High-Priority Classes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .65

Assured Classes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .65

Best-Effort Classes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .66

QoS Policy Entities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .67

Frequently Used QoS Terms. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .68

Configuration Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .72

Network QoS Policies

In This Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .73

Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .74

Normal QoS Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .74

DSCP Marking CPU Generated Traffic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .75

Default DSCP Mapping Table. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .76

Basic Configurations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .77

Create a Network QoS Policy. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .77

Default Network Policy Values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .78

Service Management Tasks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .79

Deleting QoS Policies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .79

Remove a Policy from the QoS Configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .80

Copying and Overwriting Network Policies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .80

Editing QoS Policies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .81

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Table of Contents

Network Queue QoS Policies

In This Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .83

Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .84

Basic Configurations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .85

Create a Network Queue QoS Policy. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .85

Applying Network Queue Policies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .88

Ethernet Ports. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .88

Default Network Queue Policy Values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .89

Network Ingress IP Match Criteria . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .91

Network Ingress IPv6 Match Criteria . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .92

Service Management Tasks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .93

Deleting QoS Policies. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .93

Copying and Overwriting QoS Policies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .94

Editing QoS Policies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .95

Network Queue QoS Policy Command Reference. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .97

Command Hierarchies. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .97

Network QoS Policy Command Reference. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .105

Command Hierarchies. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .105

Service Egress and Ingress QoS Policies

In This Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .131

Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .132

Egress SAP Forwarding Class and Forwarding Profile Overrides . . . . . . . . . . . . . . . . . . . . . . . . . . .133

SAP Egress QoS Policy Modifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .133

Hardware Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .133

DEI Egress Remarking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .134

DEI in IEEE 802.1ad . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .135

DEI in IEEE 802.1ah . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .135

IEEE 802.1ad Use Case . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .136

IEEE 802.1ah Use Case . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .137

Egress FC-Based Remarking. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .137

Implementation Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .139

Default Service Egress and Egress Policy Values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .141

SAP Egress Policy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .141

Default SAP Ingress Policy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .142

Basic Configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .144

Create Service Egress and Ingress QoS Policies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .144

Service Egress QoS Policy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .145

Service Ingress QoS Policy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .149

Applying Service Ingress and Egress Policies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .158

Service Management Tasks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .159

Deleting QoS Policies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .159

Remove a QoS Policy from Service SAP(s). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .159

Copying and Overwriting QoS Policies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .160

Remove a Policy from the QoS Configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .161

Editing QoS Policies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .161

Queue Depth Monitoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .161

Service SAP QoS Policy Command Reference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .165

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Table of Contents

Command Hierarchies. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .165

Queue Sharing and Redirection

In This Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .305

Queue Sharing and Redirection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .306

Supported Platforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .306

Queue Group Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .307

Access SAP Queue Group Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .307

Network Port Queue Groups for IP Interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .308

Pseudowire Shaping for Layer 2 and Layer 3 Services . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .309

QoS on Ingress Bindings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .311

Queue Group Templates and Port Queue Groups . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .313

Queue Group Templates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .313

Port Queue Groups . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .313

Forwarding Plane Queue Groups. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .315

Redirection Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .316

Access SAP Forwarding Class Based Redirection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .317

Ingress and Egress SAP Forwarding Class Redirection Association Rules. . . . . . . . . . . . . . . . . .320

Access Queue Group Statistics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .324

Network IP Interface Forwarding Class-Based Redirection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .325

Egress Network Forwarding Class Redirection Association Rules . . . . . . . . . . . . . . . . . . . . . . . .325

Egress Network IP Interface Statistics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .327

Separate Ingress IPv4 and IPv6 Statistics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .327

Ingress PW Shaping Using Spoke-SDP Forwarding Class-Based Redirection . . . . . . . . . . . . . . .328

Egress PW Shaping using Spoke-SDP Forwarding Class-Based Redirection . . . . . . . . . . . . . . .333

Ingress Per SAP Statistics with Ingress Queue Groups. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .338

Ingress and Egress PW Statistics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .340

Queue Group Behavior on LAG . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .341

Queue Group Queue Instantiation Per Link . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .341

Per Link Queue Group Queue Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .341

Adding a Queue Group to an Existing LAG . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .341

Removing a Queue Group from a LAG . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .341

Adding a Port to a LAG . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .342

Basic Configurations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .344

Configuring an Ingress Queue Group Template. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .344

Configuring Egress Queue Group Template . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .345

Applying Ingress Queue Group to SAP Ingress Policy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .346

Applying Egress Queue Group to SAP Egress Policy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .347

SAP-based Egress Queue Re-direction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .348

Configuring Queue Group on Ethernet Access Ingress Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . .350

Configuring Overrides . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .352

Configuring Queue Group on Ethernet Access Egress Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . .353

Configuring Queue Group for Network Egress Traffic on Port . . . . . . . . . . . . . . . . . . . . . . . . . . . .354

Configuring Queue Group for Network Ingress Traffic on Forwarding Plane. . . . . . . . . . . . . . . . .355

Using Queue Groups to Police Ingress/Egress Traffic on Network Interface. . . . . . . . . . . . . . . . .356

Configuring Ingress/Egress PW Shaping Using Spoke-SDP Forwarding Class-Based

Redirection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .358

Specifying QoS Policies on Service SAPs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .361

QoS Queue Group Template Command Reference. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .363

Command Hierarchies. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .363

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Shared-Queue QoS Policy Command Reference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .429

Command Hierarchies. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .429

Configuration Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .429

QoS Scheduler Policies

In This Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .441

Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .442

Scheduler Policies. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .442

Egress Port-Based Schedulers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .442

Service/ Egress Port Bandwidth Allocation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .444

Service or Scheduler Child to Port Scheduler Parent . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .446

Frame and Packet-Based Bandwidth Allocation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .450

Queue Parental Association Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .452

Service or-Level Scheduler Parental Association Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .452

Network Queue Parent Scheduler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .453

Foster Parent Behavior for Orphaned Queues and Schedulers. . . . . . . . . . . . . . . . . . . . . . . . . . .454

Frame-Based Accounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .455

Operational Modifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .455

Existing Egress Port Based Virtual Scheduling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .456

Queue Behavior Modifications for Frame Based Accounting. . . . . . . . . . . . . . . . . . . . . . . . . . . . .456

Virtual Scheduler Rate and Queue Rate Parameter Interpretation . . . . . . . . . . . . . . . . . . . . . . . .456

Virtual Scheduling Unused Bandwidth Distribution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .458

Default Unused Bandwidth Distribution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .458

Limit Unused Bandwidth. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .458

Configuring Port Scheduler Policies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .461

Port Scheduler Structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .461

Special Orphan Queue and Scheduler Behavior . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .461

Packet to Frame Bandwidth Conversion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .461

Aggregate Rate Limits for Directly Attached Queues. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .463

SAP Egress QoS Policy Queue Parenting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .463

Network Queue QoS Policy Queue Parenting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .463

Egress Port Scheduler Overrides. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .464

Weighted Scheduler Group in a Port Scheduler Policy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .464

Basic Configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .465

Create a QoS Scheduler Policy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .465

Applying Scheduler Policies. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .467

Creating a QoS Port Scheduler Policy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .469

Configuring Port Parent Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .470

Configuring Distributed LAG Rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .472

Service Management Tasks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .484

Deleting QoS Policies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .484

Removing a QoS Policy from a Customer Multi-Service Site. . . . . . . . . . . . . . . . . . . . . . . . . . . . .484

Removing a QoS Policy from SAP(s). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .485

Removing a Policy from the QoS Configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .485

Copying and Overwriting Scheduler Policies. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .486

Editing QoS Policies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .488

QoS Scheduler Policy Command Reference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .489

Command Hierarchies. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .489

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Slope QoS Policies

In This Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .521

Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .522

Basic Configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .523

Create a Slope QoS Policy. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .523

Applying Slope Policies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .525

Default Slope Policy Values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .526

Deleting QoS Policies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .527

Copying and Overwriting QoS Policies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .529

Editing QoS Policies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .531

Slope QoS Policy Command Reference. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .533

Command Hierarchies. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .533

Advanced QoS Policies

In This Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .545

Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .546

Basic Configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .547

Create an Advanced QoS Policy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .547

Applying Advanced Policies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .548

Default Advanced Policy Values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .549

Deleting QoS Policies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .550

Copying and Overwriting Advanced Policies. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .551

Editing Advanced Policies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .551

Advanced QoS Policy Command Reference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .553

Command Hierarchies. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .553

Class Fair Hierarchical Policing (CFHP)

In This Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .569

Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .570

Parent Policer Priority and Unfair Sensitive Discard Thresholds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .572

CFHP Ingress and Egress Use Cases . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .574

Post-CFHP Queuing and Scheduling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .575

Ingress CFHP Queuing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .575

Egress CFHP Queuing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .576

CFHP Policer Control Policy. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .577

Policer Control Policy Root Arbiter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .577

Tier 1 and Tier 2 Explicit Arbiters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .578

Explicit Arbiter Rate Limits. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .578

CFHP Child Policer Definition and Creation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .579

Policer Enabled SAP QoS Policy Applicability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .580

Child Policer Parent Association. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .581

Profile Capped Policers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .582

Policer Interaction with Initial Profile, Discard Eligibility, and Ingress Priority. . . . . . . . . . . . . . . . . . . . . .584

Ingress ‘Undefined’ Initial Profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .585

Ingress Explicitly ‘In-Profile’ State Packet Handling without Profile-Capped Mode. . . . . . . . . . . . . . .586

Ingress Explicitly ‘In-Profile’ State Packet Handling with Profile-Capped Mode . . . . . . . . . . . . . . . . .586

Ingress Explicit ‘Out-of-Profile’ State Packet Handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .586

Egress Explicit Profile Reclassification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .589

Preserving Out of Profile State at Egress Policer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .589

Egress Policer CIR Packet Handling without Profile Capped Mode . . . . . . . . . . . . . . . . . . . . . . . . . .589

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Egress Policer CIR Packet Handling with Profile Capped Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . .589

Ingress Child Policer Stat-Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .592

Egress Child Policer Stat-Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .595

Profile Preferred Mode Root Policers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .596

Interaction Between Profile Preferred and Profile Capped Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . .597

Class Fair Hierarchical Policing (CFHP) Policy

Command Reference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .599

Command Hierarchies. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .599

Standards and Protocol Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .603

7950 XRS Quality of Service Guide Page 9

List of Tables

Table 1: Configuration Process . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18

QoS Policies

Table 2: QoS Policy Types and Descriptions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23

Table 3: Default Network QoS Policy Egress Marking. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26

Table 4: Default Network QoS Policy DSCP to Forwarding Class Mappings . . . . . . . . . . . . . . . . . . . . . . . . .26

Table 5: Default Network Queue Policy Definition. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28

Table 6: Forwarding Class and Enqueuing Priority Classification Hierarchy Based on Rule Type . . . . . . . . .40

Table 7: Service Ingress QoS Policy IP Match Criteria . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42

Table 8: Service Ingress QoS Policy MAC Match Criteria. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42

Table 9: MAC Match Ethernet Frame Types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42

Table 10: MAC Match Criteria Frame Type Dependencies. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .43

Table 11: Default Service Ingress Policy ID 1 Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .43

Table 12: TAF Impact on Shared Buffer Average Utilization Calculation . . . . . . . . . . . . . . . . . . . . . . . . . . . .50

Table 13: Default Slope Policy Definition. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .52

Table 14: Default Slope Policy Definition. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .53

Table 15: Supported Scheduler Policies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .56

Table 16: Forwarding Class Scheduler Mapping. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .58

Table 17: Forwarding Classes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .64

Network QoS Policies

Table 18: Network Policy Defaults. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .78

Network Queue QoS Policies

Table 19: Network Queue Labels and Descriptions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .104

Table 20: Show QoS Network Output Fields . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .129

Service Egress and Ingress QoS Policies

Table 21: Classification to and (Re-)Marking from PHB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .139

Table 22: SAP Egress Policy Defaults. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .141

Table 23: SAP Ingress Policy Defaults . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .142

Table 24: Out-remark command effect . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .221

Table 25: IP Protocol Names. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .236

Table 26: Default FC HSMDA Queue ID Mappings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .240

Table 27: Ingress HSMDA Queue Mapping Behavior Based on Forwarding Type . . . . . . . . . . . . . . . . . . . .240

Queue Sharing and Redirection

Table 28: Show QoS Shared Queue Output Fields. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .440

QoS Scheduler Policies

Table 29: Show QoS Scheduler-Policy Output Fields . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .509

Table 30: Show QoS Schedule-Hierarchy Port Output Fields. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .512

Table 31: Show QoS Scheduler-Hierarchy SAP Output Fields . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .513

Table 32: Show QoS Scheduler-Stats Customer Output Fields . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .514

Page 10 7950 XRS Quality of Service Guide

List of Tables

Table 33: Show QoS Scheduler-Stats SAP Output Fields. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .514

Slope QoS Policies

Table 34: Slope Policy Defaults. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .526

Table 35: Show QoS Slope Policy Output Fields. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .543

Advanced QoS Policies

Table 36: Advanced Policy Parameter Defaults . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .549

Class Fair Hierarchical Policing (CFHP)

Table 37: Effect of Profile-Capped Mode on CIR Output. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .583

7950 XRS Quality of Service Guide Page 11

List of Figures

QoS Policies

Figure 1: Traffic Queuing Model for 3 Queues and 3 Classes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40

Figure 2: Egress Forwarding CLass Override . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44

Figure 3: RED Slope Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48

Figure 4: Virtual Scheduler Internal Bandwidth Allocation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55

Figure 5: Hierarchical Scheduler and Queue Association . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .60

Figure 6: Scheduler Policy on SAP and Scheduler Hierarchy Creation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .61

Figure 7: Scheduler Policy on Customer Site and Scheduler Hierarchy Creation. . . . . . . . . . . . . . . . . . . . . .62

Network QoS Policies

Network Queue QoS Policies

Service Egress and Ingress QoS Policies

Figure 8: DE Bit in the 802.1ad S-TAG . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .135

Figure 9: DE Aware 802.1ad Access Network. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .136

Figure 10: DE Aware PBB Topology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .137

Figure 11: DEI Processing Ingress into the PE1 SAP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .139

Figure 12: Egress SAP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .148

Figure 13: Ingress Criteria Classification Directly to Policer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .155

Queue Sharing and Redirection

Figure 14: Ingress QoS Control on VPRN Bindings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .311

QoS Scheduler Policies

Figure 15: Port Level Virtual Scheduler Bandwidth Allocation Based on Priority and CIR . . . . . . . . . . . . . .445

Figure 16: Two Scheduler Policy Model for Access Ports. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .446

Figure 17: Schedulers on SAP or Multi-Service Site Receive Bandwidth From Port Priority Levels. . . . . . .447

Figure 18: Direct Service or Association to Port Scheduler Model. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .449

Figure 19: Port Bandwidth Distribution for Service and Port Scheduler Hierarchies . . . . . . . . . . . . . . . . . . .451

Figure 20: Port Bandwidth Distribution for Direct Queue to Port Scheduler Hierarchy . . . . . . . . . . . . . . . . .451

Figure 21: Bandwidth Distribution on Network Port with Port-Based Scheduling . . . . . . . . . . . . . . . . . . . . .453

Figure 22: Limit Unused Bandwidth Example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .460

Figure 23: Resulting Bandwidth Distribution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .460

Slope QoS Policies

Advanced QoS Policies

Class Fair Hierarchical Policing (CFHP)

Figure 24: Policer Bucket Rate and Packet Flow Interaction with Bucket Depth. . . . . . . . . . . . . . . . . . . . . .573

Figure 25: Parent Policer Bucket and Priority Thresholds. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .573

Figure 26: Ingress Policer Threshold Determination and Output Behavior . . . . . . . . . . . . . . . . . . . . . . . . . .588

Figure 27: Egress Policer Threshold Determination and Output Behavior . . . . . . . . . . . . . . . . . . . . . . . . . .591

Page 12 7950 XRS Quality of Service Guide

List of Figures

7950 XRS Quality of Service Guide Page 13

Preface

About This Guide

This guide describes the Quality of Service (QoS) provided by the routers and presents examples

to configure and implement various protocols and services.

This guide is organized into functional chapters and provides concepts and descriptions of the

implementation flow, as well as Command Line Interface (CLI) syntax and command usage.

Audience

This guide is intended for network administrators who are responsible for configuring the routers.

It is assumed that the network administrators have an understanding of networking principles and

configurations. Concepts described in this guide include the following:

•CLI concepts

• Quality of Service (QoS) policies and profiles

Preface

Page 14 7950 XRS Quality of Service Guide

List of Technical Publications

The documentation set is composed of the following guides:

•

This guide describes basic system configurations and operations.

•

This guide describes system security and access configurations as well as event logging

and accounting logs.

•

This guide describes logical IP routing interfaces and associated attributes such as an IP

address, as well as IP and MAC-based filtering, and VRRP and Cflowd.

•

This guide provides an overview of routing concepts and provides configuration examples

for RIP, OSPF, IS-IS, BGP, and route policies.

• Services Overview Guide

This guide describes how to configure service parameters such as service distribution

points (SDPs), customer information, and user services.

• Layer 2 Services and EVPN Guide

This guide describes Virtual Leased Lines (VLL), Virtual Private LAN Service (VPLS),

Provider Backbone Bridging (PBB), and Ethernet VPN (EVPN).

• Layer 3 Services Guide

This guide describes Internet Enhanced Services (IES) and Virtual Private Routed

Network (VPRN) services.

• Versatile Service Module Guide

This guide describes how to configure service parameters for the Versatile Service Module

(VSM).

•

This guide describes how to configure features such as service mirroring and Operations,

Administration and Management (OAM) tools.

•

This guide describes how to configure Quality of Service (QoS) policy management.

Preface

7950 XRS Quality of Service Guide Page 15

Technical Support

If you purchased a service agreement for your router and related products from a distributor or

authorized reseller, contact the technical support staff for that distributor or reseller for assistance.

If you purchased an Alcatel-Lucent service agreement, follow this link to contact an Alcatel-

Lucent support representative and to access product manuals and documentation updates:

http://support.alcatel-lucent.com

Preface

Page 16 7950 XRS Quality of Service Guide

7950 XRS Quality of Service Guide Page 17

Getting Started

In This Chapter

This chapter provides process flow information to configure Quality of Service (QoS) policies and

provision services.

In This Chapter

Page 18 7950 XRS Quality of Service Guide

Alcatel-Lucent Services Configuration Process

Table 1 lists the tasks necessary to configure and apply QoS policies. This guide is presented in an

overall logical configuration flow. Each section describes a software area and provides CLI syntax

and command usage to configure parameters for a functional area.

Note: In SR OS 12.0.R4 any function that displays an IPv6 address or prefix changes to reflect

rules described in RFC 5952, A Recommendation for IPv6 Address Text Representation.

Specifically, hexadecimal letters in IPv6 addresses are now represented in lowercase, and the

correct compression of all leading zeros is displayed. This changes visible display output

compared to previous SR OS releases. Previous SR OS behavior can cause issues with operator

scripts that use standard IPv6 address expressions and with libraries that have standard IPv6

parsing as per RFC 5952 rules. See the section on IPv6 Addresses in the Router Configuration

Guide for more information.

Table 1: Configuration Process

Area Task Chapter

Policy configuration Configuring QoS Policies

• Network Network QoS Policies on page 73

• Network queue Network Queue QoS Policies on page 83

• SAP ingress Service Egress and Ingress QoS Policies on page 131

• Slope Slope QoS Policies on page 521

Reference • List of IEEE, IETF, and

other proprietary entities

Standards and Protocol Support on page 651

7950 XRS Quality of Service Guide Page 19

QoS Policies

In This Chapter

This chapter provides information about Quality of Service (QoS) policy

management.

Topics in this chapter include:

• QoS Overview on page 20

• Service and Network QoS Policies on page 24

→ Network QoS Policies on page 25

→ Network Queue QoS Policies on page 27

→ Service Ingress QoS Policies on page 38

→ Service Egress QoS Policies on page 44

→ Queue Parameters on page 30

• QoS Policies on page 21

• Scheduler Policies on page 54

• QoS Policy Entities on page 67

• Configuration Notes on page 72

In This Chapter

Page 20 7950 XRS Quality of Service Guide

QoS Overview

Routers are designed with Quality of Service (QoS) mechanisms on both ingress and egress to

support multiple customers and multiple services per physical interface. The router has an

extensive and flexible capabilities to classify, police, shape and mark traffic.

In the Alcatel-Lucent service router’s service model, a service is provisioned on the provider-edge

(PE) equipment. Service data is encapsulated and then sent in a service tunnel to the far-end

Alcatel-Lucent service router where the service data is delivered.

The operational theory of a service tunnel is that the encapsulation of the data between the two

Alcatel Lucent service routers (such as the 7950 XRS, 7750 SR, 7710 SR, 7750 SR MG and 7450

ESS) appear like a Layer 2 path to the service data although it is really traversing an IP or IP/

MPLS core. The tunnel from one edge device to the other edge device is provisioned with an

encapsulation and the services are mapped to the tunnel that most appropriately supports the

service needs.

The router supports eight forwarding classes internally named: Network-Control, High-1,

Expedited, High-2, Low-1, Assured, Low-2 and Best-Effort. The forwarding classes are discussed

in more detail in Forwarding Classes on page 64.

Router use QoS policies to control how QoS is handled at distinct points in the service delivery

model within the device. There are different types of QoS policies that cater to the different QoS

needs at each point in the service delivery model. QoS policies are defined in a global context in

the router and only take effect when the policy is applied to a relevant entity.

QoS policies are uniquely identified with a policy ID number or name. Policy ID 1 or Policy ID

“default” is reserved for the default policy which is used if no policy is explicitly applied.

The QoS policies within the router can be divided into three main types:

• QoS policies are used for classification, defining and queuing attributes and marking.

• Scheduler policies determine how queues are scheduled.

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