Alcatel-Lucent 7950 Quality Of Service Manual

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Alcatel-Lucent 7950
EXTENSIBLE ROUTING SYSTEM | RELEASE 13.0.R1
QUALITY OF SERVICE GUIDE
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.
Copyright 2015 © Alcatel-Lucent. All rights reserved.
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.
Copyright 2015 Alcatel-Lucent.
All rights reserved.
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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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
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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.
/