Users Guide

Creating a Primary VLAN........................................................................................................................................ 651
Creating a Community VLAN.................................................................................................................................652
Creating an Isolated VLAN..................................................................................................................................... 652
Private VLAN Conguration Example.........................................................................................................................654
Inspecting the Private VLAN Conguration...............................................................................................................655
41 Per-VLAN Spanning Tree Plus (PVST+).................................................................................................... 657
Protocol Overview......................................................................................................................................................... 657
Implementation Information......................................................................................................................................... 658
Congure Per-VLAN Spanning Tree Plus................................................................................................................... 659
Related Conguration Tasks...................................................................................................................................659
Enabling PVST+............................................................................................................................................................. 659
Disabling PVST+.............................................................................................................................................................659
Inuencing PVST+ Root Selection.............................................................................................................................. 660
Modifying Global PVST+ Parameters...........................................................................................................................661
Modifying Interface PVST+ Parameters..................................................................................................................... 662
Conguring an EdgePort.............................................................................................................................................. 663
PVST+ in Multi-Vendor Networks............................................................................................................................... 663
Enabling PVST+ Extend System ID............................................................................................................................. 663
PVST+ Sample Congurations.....................................................................................................................................664
42 Quality of Service (QoS)..........................................................................................................................667
Implementation Information......................................................................................................................................... 669
Port-Based QoS Congurations.................................................................................................................................. 669
Setting dot1p Priorities for Incoming Trac.........................................................................................................669
Honoring dot1p Priorities on Ingress Trac..........................................................................................................670
Conguring Port-Based Rate Policing...................................................................................................................670
Conguring Port-Based Rate Shaping...................................................................................................................671
Policy-Based QoS Congurations................................................................................................................................672
Classify Trac.......................................................................................................................................................... 672
Create a QoS Policy.................................................................................................................................................676
Create Policy Maps..................................................................................................................................................678
DSCP Color Maps.................................................................................................................................................... 681
Enabling QoS Rate Adjustment....................................................................................................................................683
Enabling Strict-Priority Queueing................................................................................................................................ 684
Weighted Random Early Detection..............................................................................................................................684
Creating WRED Proles..........................................................................................................................................686
Applying a WRED Prole to Trac........................................................................................................................686
Displaying Default and Congured WRED Proles.............................................................................................. 687
Displaying WRED Drop Statistics...........................................................................................................................687
Displaying egress-queue Statistics........................................................................................................................ 688
Pre-Calculating Available QoS CAM Space................................................................................................................688
Conguring Weights and ECN for WRED ................................................................................................................. 689
Global Service Pools With WRED and ECN Settings..........................................................................................689
Conguring WRED and ECN Attributes..................................................................................................................... 690
Guidelines for Conguring ECN for Classifying and Color-Marking Packets..........................................................691
Sample conguration to mark non-ecn packets as “yellow” with Multiple trac class.................................. 691
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