Administrator Guide

Modifying Global PVST+ Parameters...........................................................................................................................701
Modifying Interface PVST+ Parameters..................................................................................................................... 702
Conguring an EdgePort.............................................................................................................................................. 703
PVST+ in Multi-Vendor Networks................................................................................................................................703
Enabling PVST+ Extend System ID............................................................................................................................. 703
PVST+ Sample Congurations.....................................................................................................................................704
42 Quality of Service (QoS)..........................................................................................................................707
Implementation Information..........................................................................................................................................709
Port-Based QoS Congurations.................................................................................................................................. 709
Setting dot1p Priorities for Incoming Trac......................................................................................................... 709
Honoring dot1p Priorities on Ingress Trac...........................................................................................................710
Conguring Port-Based Rate Policing.................................................................................................................... 711
Conguring Port-Based Rate Shaping....................................................................................................................711
Policy-Based QoS Congurations.................................................................................................................................712
Classify Trac...........................................................................................................................................................712
Create a QoS Policy................................................................................................................................................. 716
Create Policy Maps...................................................................................................................................................718
DSCP Color Maps..........................................................................................................................................................722
Creating a DSCP Color Map...................................................................................................................................722
Displaying DSCP Color Maps..................................................................................................................................723
Displaying a DSCP Color Policy Conguration .................................................................................................... 723
Enabling QoS Rate Adjustment....................................................................................................................................724
Enabling Strict-Priority Queueing................................................................................................................................ 725
Weighted Random Early Detection..............................................................................................................................725
Creating WRED Proles.......................................................................................................................................... 726
Applying a WRED Prole to Trac.........................................................................................................................727
Displaying Default and Congured WRED Proles...............................................................................................727
Displaying WRED Drop Statistics........................................................................................................................... 727
Displaying egress–queue Statistics....................................................................................................................... 728
Pre-Calculating Available QoS CAM Space................................................................................................................ 728
Conguring Weights and ECN for WRED ..................................................................................................................729
Global Service Pools With WRED and ECN Settings..........................................................................................730
Conguring WRED and ECN Attributes...................................................................................................................... 731
Guidelines for Conguring ECN for Classifying and Color-Marking Packets..........................................................731
Sample conguration to mark non-ecn packets as “yellow” with Multiple trac class..................................732
Classifying Incoming Packets Using ECN and Color-Marking............................................................................732
Sample conguration to mark non-ecn packets as “yellow” with single trac class......................................734
Applying Layer 2 Match Criteria on a Layer 3 Interface............................................................................................735
Applying DSCP and VLAN Match Criteria on a Service Queue...............................................................................736
Classifying Incoming Packets Using ECN and Color-Marking..................................................................................737
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
Sample conguration to mark non-ecn packets as “yellow” with single trac class............................................739
Enabling Buer Statistics Tracking ............................................................................................................................. 740
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