Administrator Guide

Inspecting the Private VLAN Configuration...................................................................................................................675
43 Per-VLAN Spanning Tree Plus (PVST+).................................................................................... 677
Protocol Overview.............................................................................................................................................................677
Implementation Information............................................................................................................................................. 678
Configure Per-VLAN Spanning Tree Plus...................................................................................................................... 678
Enabling PVST+.................................................................................................................................................................678
Disabling PVST+................................................................................................................................................................ 678
Influencing PVST+ Root Selection..................................................................................................................................679
Modifying Global PVST+ Parameters.............................................................................................................................680
Modifying Interface PVST+ Parameters.........................................................................................................................681
Configuring an EdgePort...................................................................................................................................................681
PVST+ in Multi-Vendor Networks.................................................................................................................................. 682
Enabling PVST+ Extend System ID................................................................................................................................ 682
PVST+ Sample Configurations........................................................................................................................................683
44 Quality of Service (QoS)......................................................................................................... 685
Implementation Information............................................................................................................................................. 687
Port-Based QoS Configurations......................................................................................................................................687
Setting dot1p Priorities for Incoming Traffic............................................................................................................687
Honoring dot1p Priorities on Ingress Traffic.............................................................................................................688
Configuring Port-Based Rate Policing......................................................................................................................688
Configuring Port-Based Rate Shaping..................................................................................................................... 688
Policy-Based QoS Configurations...................................................................................................................................689
Classify Traffic.............................................................................................................................................................689
Create a QoS Policy....................................................................................................................................................692
Create Policy Maps.....................................................................................................................................................694
DSCP Color Maps............................................................................................................................................................. 697
Creating a DSCP Color Map...................................................................................................................................... 697
Displaying DSCP Color Maps.....................................................................................................................................698
Displaying a DSCP Color Policy Configuration ....................................................................................................... 698
Enabling QoS Rate Adjustment.......................................................................................................................................699
Enabling Strict-Priority Queueing....................................................................................................................................699
Weighted Random Early Detection.................................................................................................................................699
Creating WRED Profiles............................................................................................................................................. 700
Applying a WRED Profile to Traffic...........................................................................................................................700
Displaying Default and Configured WRED Profiles.................................................................................................. 701
Displaying WRED Drop Statistics............................................................................................................................... 701
Displaying egress–queue Statistics............................................................................................................................701
Pre-Calculating Available QoS CAM Space....................................................................................................................701
Configuring Weights and ECN for WRED .....................................................................................................................702
Configuring WRED and ECN Attributes.........................................................................................................................704
Guidelines for Configuring ECN for Classifying and Color-Marking Packets............................................................ 704
Sample configuration to mark non-ecn packets as “yellow” with Multiple traffic class.................................... 705
Classifying Incoming Packets Using ECN and Color-Marking...............................................................................705
Sample configuration to mark non-ecn packets as “yellow” with single traffic class.........................................707
Applying Layer 2 Match Criteria on a Layer 3 Interface...............................................................................................708
Applying DSCP and VLAN Match Criteria on a Service Queue.................................................................................. 708
Classifying Incoming Packets Using ECN and Color-Marking.....................................................................................709
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