Users Guide

Modifying Global PVST+ Parameters..........................................................................................................................709
Modifying Interface PVST+ Parameters......................................................................................................................710
Conguring an EdgePort................................................................................................................................................711
PVST+ in Multi-Vendor Networks................................................................................................................................. 711
Enabling PVST+ Extend System ID...............................................................................................................................711
PVST+ Sample Congurations......................................................................................................................................712
42 Quality of Service (QoS).......................................................................................................................... 715
Implementation Information...........................................................................................................................................717
Port-Based QoS Congurations................................................................................................................................... 717
Setting dot1p Priorities for Incoming Trac.......................................................................................................... 717
Honoring dot1p Priorities on Ingress Trac...........................................................................................................718
Conguring Port-Based Rate Policing................................................................................................................... 719
Conguring Port-Based Rate Shaping...................................................................................................................719
Policy-Based QoS Congurations................................................................................................................................720
Classify Trac.......................................................................................................................................................... 720
Create a QoS Policy.................................................................................................................................................724
Create Policy Maps..................................................................................................................................................726
DSCP Color Maps..........................................................................................................................................................730
Creating a DSCP Color Map...................................................................................................................................730
Displaying DSCP Color Maps.................................................................................................................................. 731
Displaying a DSCP Color Policy Conguration .....................................................................................................731
Enabling QoS Rate Adjustment....................................................................................................................................732
Enabling Strict-Priority Queueing................................................................................................................................ 732
Weighted Random Early Detection..............................................................................................................................733
Creating WRED Proles.......................................................................................................................................... 734
Applying a WRED Prole to Trac........................................................................................................................ 734
Displaying Default and Congured WRED Proles.............................................................................................. 734
Displaying WRED Drop Statistics...........................................................................................................................735
Displaying egress–queue Statistics....................................................................................................................... 735
Pre-Calculating Available QoS CAM Space................................................................................................................ 735
Conguring Weights and ECN for WRED ..................................................................................................................736
Global Service Pools With WRED and ECN Settings.......................................................................................... 737
Conguring WRED and ECN Attributes......................................................................................................................738
Guidelines for Conguring ECN for Classifying and Color-Marking Packets......................................................... 738
Sample conguration to mark non-ecn packets as “yellow” with Multiple trac class..................................739
Classifying Incoming Packets Using ECN and Color-Marking............................................................................739
Sample conguration to mark non-ecn packets as “yellow” with single trac class.......................................741
Applying Layer 2 Match Criteria on a Layer 3 Interface............................................................................................ 742
Applying DSCP and VLAN Match Criteria on a Service Queue............................................................................... 743
Classifying Incoming Packets Using ECN and Color-Marking..................................................................................744
Guidelines for Conguring ECN for Classifying and Color-Marking Packets......................................................... 745
Sample conguration to mark non-ecn packets as “yellow” with Multiple trac class........................................746
Sample conguration to mark non-ecn packets as “yellow” with single trac class............................................746
Enabling Buer Statistics Tracking ............................................................................................................................. 747
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