Administrator Guide

Modifying Global PVST+ Parameters...........................................................................................................................713
Modifying Interface PVST+ Parameters...................................................................................................................... 714
Conguring an EdgePort............................................................................................................................................... 715
PVST+ in Multi-Vendor Networks................................................................................................................................ 715
Enabling PVST+ Extend System ID.............................................................................................................................. 715
PVST+ Sample Congurations......................................................................................................................................716
42 Quality of Service (QoS).......................................................................................................................... 719
Implementation Information...........................................................................................................................................721
Port-Based QoS Congurations................................................................................................................................... 721
Setting dot1p Priorities for Incoming Trac.......................................................................................................... 721
Honoring dot1p Priorities on Ingress Trac..........................................................................................................722
Conguring Port-Based Rate Policing...................................................................................................................723
Conguring Port-Based Rate Shaping.................................................................................................................. 723
Policy-Based QoS Congurations................................................................................................................................724
Classify Trac.......................................................................................................................................................... 724
Create a QoS Policy.................................................................................................................................................728
Create Policy Maps..................................................................................................................................................730
DSCP Color Maps..........................................................................................................................................................734
Creating a DSCP Color Map...................................................................................................................................734
Displaying DSCP Color Maps................................................................................................................................. 735
Displaying a DSCP Color Policy Conguration .................................................................................................... 735
Enabling QoS Rate Adjustment....................................................................................................................................736
Enabling Strict-Priority Queueing................................................................................................................................ 736
Weighted Random Early Detection.............................................................................................................................. 737
Creating WRED Proles.......................................................................................................................................... 738
Applying a WRED Prole to Trac........................................................................................................................ 738
Displaying Default and Congured WRED Proles.............................................................................................. 738
Displaying WRED Drop Statistics...........................................................................................................................739
Displaying egress–queue Statistics....................................................................................................................... 739
Pre-Calculating Available QoS CAM Space................................................................................................................ 739
Conguring Weights and ECN for WRED ..................................................................................................................740
Global Service Pools With WRED and ECN Settings...........................................................................................741
Conguring WRED and ECN Attributes......................................................................................................................742
Guidelines for Conguring ECN for Classifying and Color-Marking Packets......................................................... 742
Sample conguration to mark non-ecn packets as “yellow” with Multiple trac class..................................743
Classifying Incoming Packets Using ECN and Color-Marking............................................................................743
Sample conguration to mark non-ecn packets as “yellow” with single trac class......................................745
Applying Layer 2 Match Criteria on a Layer 3 Interface............................................................................................746
Applying DSCP and VLAN Match Criteria on a Service Queue............................................................................... 747
Classifying Incoming Packets Using ECN and Color-Marking..................................................................................748
Guidelines for Conguring ECN for Classifying and Color-Marking Packets......................................................... 749
Sample conguration to mark non-ecn packets as “yellow” with Multiple trac class........................................750
Sample conguration to mark non-ecn packets as “yellow” with single trac class............................................750
Enabling Buer Statistics Tracking ..............................................................................................................................751
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