Concept Guide

ManualsBrandsDell ManualsAccess PlatformsPowerSwitch S4048T-ON

Creating PVLAN ports.............................................................................................................................................763

Creating a Primary VLAN........................................................................................................................................764

Creating a Community VLAN.................................................................................................................................765

Creating an Isolated VLAN..................................................................................................................................... 765

Private VLAN Conguration Example..........................................................................................................................767

Inspecting the Private VLAN Conguration............................................................................................................... 768

43 Per-VLAN Spanning Tree Plus (PVST+)....................................................................................................770

Protocol Overview......................................................................................................................................................... 770

Implementation Information...........................................................................................................................................771

Congure Per-VLAN Spanning Tree Plus.....................................................................................................................771

Related Conguration Tasks.................................................................................................................................... 771

Enabling PVST+.............................................................................................................................................................. 771

Disabling PVST+............................................................................................................................................................. 772

Inuencing PVST+ Root Selection............................................................................................................................... 772

Modifying Global PVST+ Parameters...........................................................................................................................774

Modifying Interface PVST+ Parameters......................................................................................................................775

Conguring an EdgePort...............................................................................................................................................776

PVST+ in Multi-Vendor Networks................................................................................................................................776

Enabling PVST+ Extend System ID..............................................................................................................................776

PVST+ Sample Congurations..................................................................................................................................... 777

44 Quality of Service (QoS)..........................................................................................................................780

Implementation Information..........................................................................................................................................782

Port-Based QoS Congurations...................................................................................................................................782

Setting dot1p Priorities for Incoming Trac......................................................................................................... 782

Honoring dot1p Priorities on Ingress Trac..........................................................................................................783

Conguring Port-Based Rate Policing...................................................................................................................784

Conguring Port-Based Rate Shaping.................................................................................................................. 784

Policy-Based QoS Congurations................................................................................................................................785

Classify Trac.......................................................................................................................................................... 785

Create a QoS Policy.................................................................................................................................................789

Create Policy Maps...................................................................................................................................................791

DSCP Color Maps..........................................................................................................................................................795

Creating a DSCP Color Map...................................................................................................................................795

Displaying DSCP Color Maps................................................................................................................................. 796

Displaying a DSCP Color Policy Conguration ....................................................................................................796

Enabling QoS Rate Adjustment.................................................................................................................................... 797

Enabling Strict-Priority Queueing.................................................................................................................................797

Weighted Random Early Detection..............................................................................................................................798

Creating WRED Proles..........................................................................................................................................799

Applying a WRED Prole to Trac........................................................................................................................ 799

Displaying Default and Congured WRED Proles.............................................................................................. 799

Displaying WRED Drop Statistics...........................................................................................................................800

Displaying egress–queue Statistics.......................................................................................................................800

Pre-Calculating Available QoS CAM Space................................................................................................................800

Contents