Concept Guide

Private VLAN Conguration Example.........................................................................................................................680
Inspecting the Private VLAN Conguration................................................................................................................681
42 Per-VLAN Spanning Tree Plus (PVST+)................................................................................................... 683
Protocol Overview.........................................................................................................................................................683
Implementation Information..........................................................................................................................................684
Congure Per-VLAN Spanning Tree Plus................................................................................................................... 684
Related Conguration Tasks...................................................................................................................................684
Enabling PVST+............................................................................................................................................................. 684
Disabling PVST+.............................................................................................................................................................685
Inuencing PVST+ Root Selection.............................................................................................................................. 685
Modifying Global PVST+ Parameters.......................................................................................................................... 687
Modifying Interface PVST+ Parameters..................................................................................................................... 688
Conguring an EdgePort.............................................................................................................................................. 689
PVST+ in Multi-Vendor Networks............................................................................................................................... 689
Enabling PVST+ Extend System ID............................................................................................................................. 689
PVST+ Sample Congurations.....................................................................................................................................690
43 Quality of Service (QoS)..........................................................................................................................693
Implementation Information......................................................................................................................................... 695
Port-Based QoS Congurations.................................................................................................................................. 695
Setting dot1p Priorities for Incoming Trac.........................................................................................................695
Honoring dot1p Priorities on Ingress Trac..........................................................................................................696
Conguring Port-Based Rate Policing...................................................................................................................697
Conguring Port-Based Rate Shaping.................................................................................................................. 697
Policy-Based QoS Congurations................................................................................................................................698
Classify Trac..........................................................................................................................................................698
Create a QoS Policy..................................................................................................................................................701
Create Policy Maps..................................................................................................................................................704
DSCP Color Maps..........................................................................................................................................................707
Creating a DSCP Color Map...................................................................................................................................707
Displaying DSCP Color Maps................................................................................................................................. 708
Displaying a DSCP Color Policy Conguration ....................................................................................................709
Enabling QoS Rate Adjustment....................................................................................................................................709
Enabling Strict-Priority Queueing.................................................................................................................................710
Weighted Random Early Detection.............................................................................................................................. 710
Creating WRED Proles............................................................................................................................................711
Applying a WRED Prole to Trac.........................................................................................................................712
Displaying Default and Congured WRED Proles...............................................................................................712
Displaying WRED Drop Statistics............................................................................................................................712
Displaying egress–queue Statistics........................................................................................................................ 713
Pre-Calculating Available QoS CAM Space.................................................................................................................713
Conguring Weights and ECN for WRED .................................................................................................................. 714
Global Service Pools With WRED and ECN Settings.......................................................................................... 715
Conguring WRED and ECN Attributes...................................................................................................................... 716
Guidelines for Conguring ECN for Classifying and Color-Marking Packets..........................................................716
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