Setup Guide

Table Of Contents
Enabling PVST+.................................................................................................................................................................654
Disabling PVST+................................................................................................................................................................654
Influencing PVST+ Root Selection................................................................................................................................. 655
Modifying Global PVST+ Parameters.............................................................................................................................656
Modifying Interface PVST+ Parameters........................................................................................................................657
Configuring an EdgePort..................................................................................................................................................657
PVST+ in Multi-Vendor Networks..................................................................................................................................658
Enabling PVST+ Extend System ID................................................................................................................................ 658
PVST+ Sample Configurations........................................................................................................................................659
42 Quality of Service (QoS).......................................................................................................... 661
Implementation Information.............................................................................................................................................663
Port-Based QoS Configurations......................................................................................................................................663
Setting dot1p Priorities for Incoming Traffic............................................................................................................663
Honoring dot1p Priorities on Ingress Traffic.............................................................................................................664
Configuring Port-Based Rate Policing......................................................................................................................664
Configuring Port-Based Rate Shaping..................................................................................................................... 664
Policy-Based QoS Configurations...................................................................................................................................665
Classify Traffic.............................................................................................................................................................665
Dot1p to Queue Mapping Requirement....................................................................................................................668
Create a QoS Policy....................................................................................................................................................669
DSCP Color Maps........................................................................................................................................................ 671
Create Policy Maps..................................................................................................................................................... 672
Enabling QoS Rate Adjustment....................................................................................................................................... 675
Enabling Strict-Priority Queueing....................................................................................................................................676
Queue Classification Requirements for PFC Functionality.......................................................................................... 676
Support for marking dot1p value in L3 Input Qos Policy.............................................................................................. 676
Weighted Random Early Detection................................................................................................................................. 677
Enabling and Disabling WRED Globally..................................................................................................................... 678
Creating WRED Profiles..............................................................................................................................................678
Applying a WRED Profile to Traffic...........................................................................................................................678
Displaying Default and Configured WRED Profiles................................................................................................. 678
Displaying WRED Drop Statistics.............................................................................................................................. 678
Displaying egress–queue Statistics...........................................................................................................................679
Pre-Calculating Available QoS CAM Space................................................................................................................... 679
Specifying Policy-Based Rate Shaping in Packets Per Second..................................................................................680
Configuring Policy-Based Rate Shaping......................................................................................................................... 681
Configuring Weights and ECN for WRED ..................................................................................................................... 681
Configuring WRED and ECN Attributes.........................................................................................................................682
Guidelines for Configuring ECN for Classifying and Color-Marking Packets............................................................ 683
Sample configuration to mark non-ecn packets as “yellow” with Multiple traffic class.................................... 683
Classifying Incoming Packets Using ECN and Color-Marking...............................................................................684
Sample configuration to mark non-ecn packets as “yellow” with single traffic class........................................ 685
Applying Layer 2 Match Criteria on a Layer 3 Interface.............................................................................................. 686
Managing Hardware Buffer Statistics...................................................................................................................... 687
Enabling Buffer Statistics Tracking ................................................................................................................................687
43 Routing Information Protocol (RIP)..........................................................................................689
Protocol Overview............................................................................................................................................................ 689
Contents
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