Concept Guide

40 Private VLANs (PVLAN)...........................................................................................................................741
Private VLAN Concepts.................................................................................................................................................741
Using the Private VLAN Commands........................................................................................................................... 742
Conguration Task List.................................................................................................................................................. 743
Creating PVLAN ports.............................................................................................................................................743
Creating a Primary VLAN........................................................................................................................................744
Creating a Community VLAN................................................................................................................................. 745
Creating an Isolated VLAN......................................................................................................................................745
Private VLAN Conguration Example..........................................................................................................................747
Inspecting the Private VLAN Conguration............................................................................................................... 748
41 Per-VLAN Spanning Tree Plus (PVST+).................................................................................................... 750
Protocol Overview.........................................................................................................................................................750
Implementation Information...........................................................................................................................................751
Congure Per-VLAN Spanning Tree Plus.................................................................................................................... 751
Related Conguration Tasks....................................................................................................................................751
Enabling PVST+.............................................................................................................................................................. 751
Disabling PVST+.............................................................................................................................................................752
Inuencing PVST+ Root Selection...............................................................................................................................752
Modifying Global PVST+ Parameters.......................................................................................................................... 754
Modifying Interface PVST+ Parameters..................................................................................................................... 755
Conguring an EdgePort.............................................................................................................................................. 756
PVST+ in Multi-Vendor Networks............................................................................................................................... 756
Enabling PVST+ Extend System ID............................................................................................................................. 756
PVST+ Sample Congurations..................................................................................................................................... 757
42 Quality of Service (QoS)..........................................................................................................................760
Implementation Information..........................................................................................................................................762
Port-Based QoS Congurations...................................................................................................................................762
Setting dot1p Priorities for Incoming Trac......................................................................................................... 762
Honoring dot1p Priorities on Ingress Trac..........................................................................................................763
Conguring Port-Based Rate Policing...................................................................................................................764
Conguring Port-Based Rate Shaping.................................................................................................................. 764
Policy-Based QoS Congurations................................................................................................................................765
Classify Trac.......................................................................................................................................................... 765
Dot1p to Queue Mapping Requirement.................................................................................................................769
Create a QoS Policy.................................................................................................................................................769
DSCP Color Maps....................................................................................................................................................772
Create Policy Maps.................................................................................................................................................. 774
Enabling QoS Rate Adjustment.................................................................................................................................... 777
Enabling Strict-Priority Queueing.................................................................................................................................778
Queue Classication Requirements for PFC Functionality....................................................................................... 778
Support for marking dot1p value in L3 Input Qos Policy........................................................................................... 778
Weighted Random Early Detection..............................................................................................................................779
Creating WRED Proles..........................................................................................................................................780
24
Contents