Deployment Guide

Table Of Contents
Implementation Information......................................................................................................................................... 640
Configure Per-VLAN Spanning Tree Plus..................................................................................................................641
Enabling PVST+............................................................................................................................................................... 641
Disabling PVST+...............................................................................................................................................................641
Influencing PVST+ Root Selection............................................................................................................................. 642
Modifying Global PVST+ Parameters........................................................................................................................ 643
Modifying Interface PVST+ Parameters................................................................................................................... 643
Configuring an EdgePort...............................................................................................................................................644
PVST+ in Multi-Vendor Networks.............................................................................................................................. 645
Enabling PVST+ Extend System ID............................................................................................................................ 645
PVST+ Sample Configurations.................................................................................................................................... 646
Chapter 43: Quality of Service (QoS)........................................................................................ 648
Implementation Information......................................................................................................................................... 650
Port-Based QoS Configurations..................................................................................................................................650
Setting dot1p Priorities for Incoming Traffic......................................................................................................650
Honoring dot1p Priorities on Ingress Traffic....................................................................................................... 651
Configuring Port-Based Rate Policing..................................................................................................................651
Configuring Port-Based Rate Shaping.................................................................................................................652
Policy-Based QoS Configurations...............................................................................................................................653
Classify Traffic...........................................................................................................................................................653
Create a QoS Policy................................................................................................................................................. 656
Create Policy Maps.................................................................................................................................................. 658
DSCP Color Maps............................................................................................................................................................661
Creating a DSCP Color Map................................................................................................................................... 661
Displaying DSCP Color Maps................................................................................................................................. 662
Displaying a DSCP Color Policy Configuration ..................................................................................................662
Enabling QoS Rate Adjustment................................................................................................................................... 663
Enabling Strict-Priority Queueing............................................................................................................................... 663
Weighted Random Early Detection.............................................................................................................................663
Creating WRED Profiles.......................................................................................................................................... 664
Applying a WRED Profile to Traffic...................................................................................................................... 664
Displaying Default and Configured WRED Profiles........................................................................................... 665
Displaying WRED Drop Statistics..........................................................................................................................665
Displaying egressqueue Statistics...................................................................................................................... 665
Pre-Calculating Available QoS CAM Space..............................................................................................................666
Configuring Weights and ECN for WRED ................................................................................................................667
Configuring WRED and ECN Attributes.................................................................................................................... 668
Guidelines for Configuring ECN for Classifying and Color-Marking Packets...................................................669
Sample configuration to mark non-ecn packets as yellow with Multiple traffic class..........................669
Classifying Incoming Packets Using ECN and Color-Marking........................................................................670
Sample configuration to mark non-ecn packets as yellow with single traffic class...............................671
Applying Layer 2 Match Criteria on a Layer 3 Interface........................................................................................672
Applying DSCP and VLAN Match Criteria on a Service Queue........................................................................... 673
Classifying Incoming Packets Using ECN and Color-Marking..............................................................................673
Guidelines for Configuring ECN for Classifying and Color-Marking Packets...................................................675
Sample configuration to mark non-ecn packets as yellow with Multiple traffic class................................676
Sample configuration to mark non-ecn packets as yellow with single traffic class....................................676
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