Reference Guide

37 Per-VLAN Spanning Tree Plus (PVST+)...................................................... 674
Protocol Overview............................................................................................................................674
Implementation Information............................................................................................................ 675
Configure Per-VLAN Spanning Tree Plus........................................................................................ 675
Related Configuration Tasks.......................................................................................................675
Enabling PVST+.................................................................................................................................675
Disabling PVST+................................................................................................................................676
Influencing PVST+ Root Selection...................................................................................................676
Modifying Global PVST+ Parameters...............................................................................................678
Modifying Interface PVST+ Parameters...........................................................................................679
Configuring an EdgePort................................................................................................................. 680
PVST+ in Multi-Vendor Networks....................................................................................................680
Enabling PVST+ Extend System ID...................................................................................................681
PVST+ Sample Configurations.........................................................................................................682
38 Quality of Service (QoS)............................................................................... 684
Implementation Information............................................................................................................686
Port-Based QoS Configurations...................................................................................................... 686
Setting dot1p Priorities for Incoming Traffic..............................................................................687
Honoring dot1p Priorities on Ingress Traffic..............................................................................687
Configuring Port-Based Rate Policing.......................................................................................688
Configuring Port-Based Rate Shaping.......................................................................................689
Policy-Based QoS Configurations...................................................................................................690
Classify Traffic.............................................................................................................................690
Dot1p to Queue Mapping Requirement.................................................................................... 694
Create a QoS Policy....................................................................................................................695
DSCP Color Maps........................................................................................................................697
Create Policy Maps..................................................................................................................... 699
Enabling QoS Rate Adjustment........................................................................................................ 703
Enabling Strict-Priority Queueing.................................................................................................... 703
Queue Classification Requirements for PFC Functionality.............................................................704
Support for marking dot1p value in L3 Input Qos Policy................................................................704
Weighted Random Early Detection..................................................................................................705
Creating WRED Profiles.............................................................................................................. 706
Applying a WRED Profile to Traffic.............................................................................................706
Displaying Default and Configured WRED Profiles....................................................................707
Displaying WRED Drop Statistics................................................................................................ 707
Displaying egress-queue Statistics.............................................................................................707
Pre-Calculating Available QoS CAM Space..................................................................................... 707
Specifying Policy-Based Rate Shaping in Packets Per Second.......................................................709
Configuring Policy-Based Rate Shaping..........................................................................................709
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