Service Manual

Inuencing PVST+ Root Selection..................................................................................................................................578
Modifying Global PVST+ Parameters..............................................................................................................................579
Modifying Interface PVST+ Parameters......................................................................................................................... 580
Conguring an EdgePort................................................................................................................................................ 581
PVST+ in Multi-Vendor Networks................................................................................................................................... 581
Enabling PVST+ Extend System ID................................................................................................................................ 582
PVST+ Sample Congurations....................................................................................................................................... 582
40 Quality of Service (QoS)...........................................................................................585
Implementation Information........................................................................................................................................... 586
Port-Based QoS Congurations..................................................................................................................................... 587
Setting dot1p Priorities for Incoming Trac..............................................................................................................587
Honoring dot1p Priorities on Ingress Trac...............................................................................................................587
Conguring Port-Based Rate Policing...................................................................................................................... 588
Conguring Port-Based Rate Shaping......................................................................................................................588
Policy-Based QoS Congurations...................................................................................................................................589
Classify Trac..........................................................................................................................................................589
Create a QoS Policy................................................................................................................................................. 593
Create Policy Maps.................................................................................................................................................. 594
DSCP Color Maps..........................................................................................................................................................598
Creating a DSCP Color Map.................................................................................................................................... 598
Displaying DSCP Color Maps................................................................................................................................... 599
Displaying a DSCP Color Policy Conguration .........................................................................................................599
Enabling QoS Rate Adjustment......................................................................................................................................600
Enabling Strict-Priority Queueing...................................................................................................................................600
Weighted Random Early Detection.................................................................................................................................600
Creating WRED Proles............................................................................................................................................601
Applying a WRED Prole to Trac........................................................................................................................... 602
Displaying Default and Congured WRED Proles....................................................................................................602
Displaying WRED Drop Statistics..............................................................................................................................602
Displaying egress-queue Statistics........................................................................................................................... 603
Pre-Calculating Available QoS CAM Space.................................................................................................................... 603
Conguring Weights and ECN for WRED ......................................................................................................................604
Global Service Pools With WRED and ECN Settings................................................................................................605
Conguring WRED and ECN Attributes......................................................................................................................... 606
Guidelines for Conguring ECN for Classifying and Color-Marking Packets................................................................... 607
Sample conguration to mark non-ecn packets as “yellow” with Multiple trac class............................................. 607
Classifying Incoming Packets Using ECN and Color-Marking................................................................................... 607
Sample conguration to mark non-ecn packets as “yellow” with single trac class.................................................609
Applying Layer 2 Match Criteria on a Layer 3 Interface...................................................................................................610
Applying DSCP and VLAN Match Criteria on a Service Queue........................................................................................ 611
Classifying Incoming Packets Using ECN and Color-Marking..........................................................................................612
Guidelines for Conguring ECN for Classifying and Color-Marking Packets....................................................................613
Sample conguration to mark non-ecn packets as “yellow” with Multiple trac class.................................................... 614
Sample conguration to mark non-ecn packets as “yellow” with single trac class........................................................614
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