Users Guide

Disabling PVST+.............................................................................................................................................................768
Inuencing PVST+ Root Selection...............................................................................................................................768
Modifying Global PVST+ Parameters.......................................................................................................................... 770
Modifying Interface PVST+ Parameters...................................................................................................................... 771
Conguring an EdgePort...............................................................................................................................................772
PVST+ in Multi-Vendor Networks................................................................................................................................772
Enabling PVST+ Extend System ID..............................................................................................................................772
PVST+ Sample Congurations..................................................................................................................................... 773
45 Quality of Service (QoS)..........................................................................................................................776
Implementation Information..........................................................................................................................................778
Port-Based QoS Congurations...................................................................................................................................778
Setting dot1p Priorities for Incoming Trac......................................................................................................... 778
Honoring dot1p Priorities on Ingress Trac..........................................................................................................779
Conguring Port-Based Rate Policing...................................................................................................................780
Conguring Port-Based Rate Shaping..................................................................................................................780
Policy-Based QoS Congurations.................................................................................................................................781
Classify Trac...........................................................................................................................................................781
Create a QoS Policy.................................................................................................................................................785
Create Policy Maps.................................................................................................................................................. 787
DSCP Color Maps...........................................................................................................................................................791
Creating a DSCP Color Map................................................................................................................................... 791
Displaying DSCP Color Maps................................................................................................................................. 792
Displaying a DSCP Color Policy Conguration .................................................................................................... 792
Enabling QoS Rate Adjustment....................................................................................................................................793
Enabling Strict-Priority Queueing................................................................................................................................ 793
Weighted Random Early Detection..............................................................................................................................794
Creating WRED Proles..........................................................................................................................................795
Applying a WRED Prole to Trac........................................................................................................................ 795
Displaying Default and Congured WRED Proles..............................................................................................795
Displaying WRED Drop Statistics...........................................................................................................................795
Displaying egress–queue Statistics....................................................................................................................... 796
Pre-Calculating Available QoS CAM Space................................................................................................................796
Conguring Weights and ECN for WRED ..................................................................................................................797
Global Service Pools With WRED and ECN Settings.......................................................................................... 797
Conguring WRED and ECN Attributes......................................................................................................................798
Guidelines for Conguring ECN for Classifying and Color-Marking Packets......................................................... 799
Sample conguration to mark non-ecn packets as “yellow” with Multiple trac class................................. 800
Classifying Incoming Packets Using ECN and Color-Marking........................................................................... 800
Sample conguration to mark non-ecn packets as “yellow” with single trac class......................................802
Applying Layer 2 Match Criteria on a Layer 3 Interface............................................................................................803
Applying DSCP and VLAN Match Criteria on a Service Queue...............................................................................803
Classifying Incoming Packets Using ECN and Color-Marking................................................................................. 804
Guidelines for Conguring ECN for Classifying and Color-Marking Packets.........................................................806
Sample conguration to mark non-ecn packets as “yellow” with Multiple trac class........................................807
Sample conguration to mark non-ecn packets as “yellow” with single trac class............................................807
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