Concept Guide

Creating an Isolated VLAN......................................................................................................................................770
Private VLAN Conguration Example..........................................................................................................................772
Inspecting the Private VLAN Conguration................................................................................................................773
44 Per-VLAN Spanning Tree Plus (PVST+)....................................................................................................775
Protocol Overview......................................................................................................................................................... 775
Implementation Information..........................................................................................................................................776
Congure Per-VLAN Spanning Tree Plus....................................................................................................................776
Related Conguration Tasks................................................................................................................................... 776
Enabling PVST+..............................................................................................................................................................776
Disabling PVST+............................................................................................................................................................. 777
Inuencing PVST+ Root Selection............................................................................................................................... 777
Modifying Global PVST+ Parameters.......................................................................................................................... 779
Modifying Interface PVST+ Parameters..................................................................................................................... 780
Conguring an EdgePort............................................................................................................................................... 781
PVST+ in Multi-Vendor Networks................................................................................................................................ 781
Enabling PVST+ Extend System ID.............................................................................................................................. 781
PVST+ Sample Congurations..................................................................................................................................... 782
45 Quality of Service (QoS)..........................................................................................................................785
Implementation Information.......................................................................................................................................... 787
Port-Based QoS Congurations...................................................................................................................................787
Setting dot1p Priorities for Incoming Trac..........................................................................................................787
Honoring dot1p Priorities on Ingress Trac..........................................................................................................788
Conguring Port-Based Rate Policing...................................................................................................................789
Conguring Port-Based Rate Shaping..................................................................................................................789
Policy-Based QoS Congurations................................................................................................................................790
Classify Trac..........................................................................................................................................................790
Create a QoS Policy.................................................................................................................................................794
Create Policy Maps..................................................................................................................................................796
DSCP Color Maps......................................................................................................................................................... 800
Creating a DSCP Color Map.................................................................................................................................. 800
Displaying DSCP Color Maps..................................................................................................................................801
Displaying a DSCP Color Policy Conguration .....................................................................................................801
Enabling QoS Rate Adjustment....................................................................................................................................802
Enabling Strict-Priority Queueing................................................................................................................................ 802
Weighted Random Early Detection..............................................................................................................................803
Creating WRED Proles..........................................................................................................................................804
Applying a WRED Prole to Trac........................................................................................................................804
Displaying Default and Congured WRED Proles..............................................................................................804
Displaying WRED Drop Statistics...........................................................................................................................804
Displaying egress–queue Statistics.......................................................................................................................805
Pre-Calculating Available QoS CAM Space................................................................................................................805
Conguring Weights and ECN for WRED ................................................................................................................. 806
Global Service Pools With WRED and ECN Settings..........................................................................................806
Conguring WRED and ECN Attributes......................................................................................................................807
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