White Papers

Table Of Contents
Enabling PVST+...............................................................................................................................................................686
Disabling PVST+..............................................................................................................................................................686
Influencing PVST+ Root Selection..............................................................................................................................687
Modifying Global PVST+ Parameters........................................................................................................................ 688
Modifying Interface PVST+ Parameters................................................................................................................... 688
Configuring an EdgePort...............................................................................................................................................689
PVST+ in Multi-Vendor Networks.............................................................................................................................. 690
Enabling PVST+ Extend System ID............................................................................................................................ 690
PVST+ Sample Configurations.....................................................................................................................................691
Chapter 42: Quality of Service (QoS)........................................................................................ 693
Implementation Information......................................................................................................................................... 695
Port-Based QoS Configurations..................................................................................................................................695
Setting dot1p Priorities for Incoming Traffic......................................................................................................695
Honoring dot1p Priorities on Ingress Traffic.......................................................................................................696
Configuring Port-Based Rate Policing................................................................................................................. 696
Configuring Port-Based Rate Shaping.................................................................................................................696
Policy-Based QoS Configurations............................................................................................................................... 697
Classify Traffic...........................................................................................................................................................698
Dot1p to Queue Mapping Requirement................................................................................................................700
Create a QoS Policy.................................................................................................................................................. 701
DSCP Color Maps..................................................................................................................................................... 703
Create Policy Maps...................................................................................................................................................705
Enabling QoS Rate Adjustment................................................................................................................................... 708
Enabling Strict-Priority Queueing............................................................................................................................... 709
Queue Classification Requirements for PFC Functionality................................................................................... 709
Support for marking dot1p value in L3 Input Qos Policy....................................................................................... 709
Weighted Random Early Detection..............................................................................................................................710
Enabling and Disabling WRED Globally.................................................................................................................. 711
Creating WRED Profiles............................................................................................................................................ 711
Applying a WRED Profile to Traffic........................................................................................................................ 711
Displaying Default and Configured WRED Profiles............................................................................................. 711
Displaying WRED Drop Statistics............................................................................................................................711
Displaying egressqueue Statistics....................................................................................................................... 712
Pre-Calculating Available QoS CAM Space............................................................................................................... 712
Specifying Policy-Based Rate Shaping in Packets Per Second............................................................................713
Configuring Policy-Based Rate Shaping.....................................................................................................................714
Configuring Weights and ECN for WRED .................................................................................................................714
Configuring WRED and ECN Attributes..................................................................................................................... 716
Guidelines for Configuring ECN for Classifying and Color-Marking Packets....................................................716
Sample configuration to mark non-ecn packets as yellow with Multiple traffic class...........................717
Classifying Incoming Packets Using ECN and Color-Marking.........................................................................717
Sample configuration to mark non-ecn packets as yellow with single traffic class...............................719
Applying Layer 2 Match Criteria on a Layer 3 Interface........................................................................................720
Managing Hardware Buffer Statistics..................................................................................................................720
Enabling Buffer Statistics Tracking ............................................................................................................................721
Chapter 43: Routing Information Protocol (RIP)........................................................................723
Protocol Overview.......................................................................................................................................................... 723
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