White Papers

Table Of Contents
Inspecting the Private VLAN Configuration............................................................................................................. 708
Chapter 43: Per-VLAN Spanning Tree Plus (PVST+).................................................................. 710
Protocol Overview...........................................................................................................................................................710
Implementation Information........................................................................................................................................... 711
Configure Per-VLAN Spanning Tree Plus.................................................................................................................. 712
Enabling PVST+................................................................................................................................................................712
Disabling PVST+...............................................................................................................................................................712
Influencing PVST+ Root Selection.............................................................................................................................. 713
Modifying Global PVST+ Parameters......................................................................................................................... 714
Modifying Interface PVST+ Parameters.................................................................................................................... 714
Configuring an EdgePort................................................................................................................................................715
PVST+ in Multi-Vendor Networks............................................................................................................................... 716
Enabling PVST+ Extend System ID............................................................................................................................. 716
PVST+ Sample Configurations..................................................................................................................................... 717
Chapter 44: Quality of Service (QoS)......................................................................................... 719
Implementation Information.......................................................................................................................................... 721
Port-Based QoS Configurations...................................................................................................................................721
Setting dot1p Priorities for Incoming Traffic.......................................................................................................721
Honoring dot1p Priorities on Ingress Traffic....................................................................................................... 722
Configuring Port-Based Rate Policing................................................................................................................. 722
Configuring Port-Based Rate Shaping................................................................................................................. 723
Policy-Based QoS Configurations............................................................................................................................... 724
Classify Traffic........................................................................................................................................................... 724
Create a QoS Policy..................................................................................................................................................727
Create Policy Maps...................................................................................................................................................729
DSCP Color Maps........................................................................................................................................................... 732
Creating a DSCP Color Map................................................................................................................................... 732
Displaying DSCP Color Maps..................................................................................................................................733
Displaying a DSCP Color Policy Configuration ..................................................................................................734
Enabling QoS Rate Adjustment....................................................................................................................................734
Enabling Strict-Priority Queueing............................................................................................................................... 735
Weighted Random Early Detection.............................................................................................................................735
Creating WRED Profiles...........................................................................................................................................736
Applying a WRED Profile to Traffic.......................................................................................................................736
Displaying Default and Configured WRED Profiles........................................................................................... 736
Displaying WRED Drop Statistics...........................................................................................................................737
Displaying egressqueue Statistics.......................................................................................................................737
Pre-Calculating Available QoS CAM Space.............................................................................................................. 737
Configuring Weights and ECN for WRED ................................................................................................................ 738
Configuring WRED and ECN Attributes.................................................................................................................... 739
Guidelines for Configuring ECN for Classifying and Color-Marking Packets................................................... 740
Sample configuration to mark non-ecn packets as yellow with Multiple traffic class...........................741
Classifying Incoming Packets Using ECN and Color-Marking.........................................................................741
Sample configuration to mark non-ecn packets as yellow with single traffic class.............................. 742
Applying Layer 2 Match Criteria on a Layer 3 Interface........................................................................................744
Applying DSCP and VLAN Match Criteria on a Service Queue........................................................................... 744
Classifying Incoming Packets Using ECN and Color-Marking..............................................................................745
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