Configure Per-VLAN Spanning Tree Plus........................................................................................ 685
Related Configuration Tasks...................................................................................................... 685
Enabling PVST+.................................................................................................................................685
Disabling PVST+............................................................................................................................... 686
Influencing PVST+ Root Selection...................................................................................................686
Modifying Global PVST+ Parameters...............................................................................................688
Modifying Interface PVST+ Parameters...........................................................................................689
Configuring an EdgePort................................................................................................................. 690
PVST+ in Multi-Vendor Networks.................................................................................................... 691
Enabling PVST+ Extend System ID...................................................................................................691
PVST+ Sample Configurations.........................................................................................................692
37 Quality of Service (QoS)................................................................................694
Implementation Information............................................................................................................696
Port-Based QoS Configurations...................................................................................................... 696
Setting dot1p Priorities for Incoming Traffic..............................................................................697
Honoring dot1p Priorities on Ingress Traffic..............................................................................697
Configuring Port-Based Rate Policing.......................................................................................698
Configuring Port-Based Rate Shaping.......................................................................................698
Policy-Based QoS Configurations................................................................................................... 699
Classify Traffic.............................................................................................................................700
Dot1p to Queue Mapping Requirement.....................................................................................703
Create a QoS Policy....................................................................................................................704
DSCP Color Maps....................................................................................................................... 706
Create Policy Maps..................................................................................................................... 708
Enabling QoS Rate Adjustment.........................................................................................................712
Enabling Strict-Priority Queueing.....................................................................................................713
Queue Classification Requirements for PFC Functionality..............................................................713
Support for marking dot1p value in L3 Input Qos Policy.................................................................714
Weighted Random Early Detection.................................................................................................. 714
Creating WRED Profiles...............................................................................................................715
Applying a WRED Profile to Traffic............................................................................................. 716
Displaying Default and Configured WRED Profiles....................................................................716
Displaying WRED Drop Statistics................................................................................................ 716
Pre-Calculating Available QoS CAM Space......................................................................................716
Specifying Policy-Based Rate Shaping in Packets Per Second........................................................717
Configuring Policy-Based Rate Shaping.......................................................................................... 718
Configuring Weights and ECN for WRED ........................................................................................719
Global Service Pools With WRED and ECN Settings................................................................. 720
Configuring WRED and ECN Attributes............................................................................................721
Guidelines for Configuring ECN for Classifying and Color-Marking Packets................................ 722
Sample configuration to mark non-ecn packets as “yellow” with Multiple traffic class.......... 723
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