Administrator Guide

ManualsBrandsDell ManualsAccess PlatformsPowerSwitch S3048-ON

Implementation Information..........................................................................................................................................626

Congure Per-VLAN Spanning Tree Plus................................................................................................................... 626

Related Conguration Tasks...................................................................................................................................626

Enabling PVST+............................................................................................................................................................. 626

Disabling PVST+.............................................................................................................................................................627

Inuencing PVST+ Root Selection...............................................................................................................................627

Modifying Global PVST+ Parameters..........................................................................................................................629

Modifying Interface PVST+ Parameters..................................................................................................................... 630

Conguring an EdgePort............................................................................................................................................... 631

PVST+ in Multi-Vendor Networks................................................................................................................................ 631

Enabling PVST+ Extend System ID.............................................................................................................................. 631

PVST+ Sample Congurations.....................................................................................................................................632

39 Quality of Service (QoS)......................................................................................................................... 635

Implementation Information..........................................................................................................................................637

Port-Based QoS Congurations...................................................................................................................................637

Setting dot1p Priorities for Incoming Trac......................................................................................................... 637

Honoring dot1p Priorities on Ingress Trac..........................................................................................................638

Conguring Port-Based Rate Policing.................................................................................................................. 639

Conguring Port-Based Rate Shaping..................................................................................................................639

Policy-Based QoS Congurations................................................................................................................................640

Classify Trac...........................................................................................................................................................641

Create a QoS Policy.................................................................................................................................................644

Create Policy Maps..................................................................................................................................................646

DSCP Color Maps......................................................................................................................................................... 650

Creating a DSCP Color Map.................................................................................................................................. 650

Displaying DSCP Color Maps..................................................................................................................................651

Displaying a DSCP Color Policy Conguration .....................................................................................................651

Enabling QoS Rate Adjustment....................................................................................................................................652

Enabling Strict-Priority Queueing................................................................................................................................ 653

Weighted Random Early Detection............................................................................................................................. 653

Creating WRED Proles..........................................................................................................................................654

Applying a WRED Prole to Trac........................................................................................................................655

Displaying Default and Congured WRED Proles..............................................................................................655

Displaying WRED Drop Statistics.......................................................................................................................... 655

Displaying egress–queue Statistics.......................................................................................................................656

Pre-Calculating Available QoS CAM Space................................................................................................................656

Conguring Weights and ECN for WRED ..................................................................................................................657

Global Service Pools With WRED and ECN Settings..........................................................................................658

Conguring WRED and ECN Attributes..................................................................................................................... 659

Guidelines for Conguring ECN for Classifying and Color-Marking Packets.........................................................659

Sample conguration to mark non-ecn packets as “yellow” with Multiple trac class................................. 660

Classifying Incoming Packets Using ECN and Color-Marking........................................................................... 660

Sample conguration to mark non-ecn packets as “yellow” with single trac class..................................... 662

Applying Layer 2 Match Criteria on a Layer 3 Interface............................................................................................663

Applying DSCP and VLAN Match Criteria on a Service Queue...............................................................................664

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