Reference Guide

Creating an Isolated VLAN.......................................................................................................... 722
Private VLAN Configuration Example...............................................................................................723
Inspecting the Private VLAN Configuration..................................................................................... 724
41 Per-VLAN Spanning Tree Plus (PVST+)......................................................... 727
Protocol Overview............................................................................................................................ 727
Implementation Information............................................................................................................728
Configure Per-VLAN Spanning Tree Plus........................................................................................ 728
Related Configuration Tasks.......................................................................................................728
Enabling PVST+.................................................................................................................................729
Disabling PVST+................................................................................................................................729
Influencing PVST+ Root Selection................................................................................................... 729
Modifying Global PVST+ Parameters................................................................................................731
Modifying Interface PVST+ Parameters........................................................................................... 732
Configuring an EdgePort.................................................................................................................. 733
PVST+ in Multi-Vendor Networks.................................................................................................... 734
Enabling PVST+ Extend System ID...................................................................................................734
PVST+ Sample Configurations......................................................................................................... 735
42 Quality of Service (QoS)....................................................................................737
Implementation Information............................................................................................................ 739
Port-Based QoS Configurations.......................................................................................................739
Setting dot1p Priorities for Incoming Traffic..............................................................................740
Honoring dot1p Priorities on Ingress Traffic..............................................................................740
Configuring Port-Based Rate Policing........................................................................................741
Configuring Port-Based Rate Shaping........................................................................................741
Policy-Based QoS Configurations....................................................................................................742
Classify Traffic............................................................................................................................. 742
Create a QoS Policy....................................................................................................................746
Create Policy Maps..................................................................................................................... 749
DSCP Color Maps........................................................................................................................752
Enabling QoS Rate Adjustment........................................................................................................ 755
Enabling Strict-Priority Queueing.................................................................................................... 755
Weighted Random Early Detection..................................................................................................756
Creating WRED Profiles...............................................................................................................757
Applying a WRED Profile to Traffic............................................................................................. 757
Displaying Default and Configured WRED Profiles....................................................................757
Displaying WRED Drop Statistics................................................................................................ 758
Pre-Calculating Available QoS CAM Space..................................................................................... 758
Configuring Weights and ECN for WRED ....................................................................................... 759
Global Service Pools With WRED and ECN Settings................................................................. 760
Configuring WRED and ECN Attributes............................................................................................761