Users Guide

Congure Per-VLAN Spanning Tree Plus........................................................................................................................ 661
Related Conguration Tasks......................................................................................................................................661
Enabling PVST+.............................................................................................................................................................. 661
Disabling PVST+............................................................................................................................................................. 661
Inuencing PVST+ Root Selection..................................................................................................................................662
Modifying Global PVST+ Parameters............................................................................................................................. 663
Modifying Interface PVST+ Parameters......................................................................................................................... 664
Conguring an EdgePort................................................................................................................................................665
PVST+ in Multi-Vendor Networks.................................................................................................................................. 665
Enabling PVST+ Extend System ID................................................................................................................................ 666
PVST+ Sample Congurations....................................................................................................................................... 666
43 Quality of Service (QoS)...........................................................................................669
Implementation Information............................................................................................................................................670
Port-Based QoS Congurations......................................................................................................................................671
Setting dot1p Priorities for Incoming Trac...............................................................................................................671
Honoring dot1p Priorities on Ingress Trac............................................................................................................... 671
Conguring Port-Based Rate Policing...................................................................................................................... 672
Conguring Port-Based Rate Shaping......................................................................................................................672
Policy-Based QoS Congurations...................................................................................................................................673
Classify Trac.......................................................................................................................................................... 674
Create a QoS Policy..................................................................................................................................................677
Create Policy Maps.................................................................................................................................................. 679
DSCP Color Maps....................................................................................................................................................682
Enabling QoS Rate Adjustment...................................................................................................................................... 684
Enabling Strict-Priority Queueing................................................................................................................................... 685
Weighted Random Early Detection.................................................................................................................................685
Creating WRED Proles........................................................................................................................................... 686
Applying a WRED Prole to Trac........................................................................................................................... 686
Displaying Default and Congured WRED Proles.................................................................................................... 687
Displaying WRED Drop Statistics..............................................................................................................................687
Displaying egress-queue Statistics............................................................................................................................687
Pre-Calculating Available QoS CAM Space.................................................................................................................... 688
Conguring Weights and ECN for WRED ......................................................................................................................688
Global Service Pools With WRED and ECN Settings................................................................................................689
Conguring WRED and ECN Attributes......................................................................................................................... 690
Guidelines for Conguring ECN for Classifying and Color-Marking Packets....................................................................691
Sample conguration to mark non-ecn packets as “yellow” with Multiple trac class..............................................691
Classifying Incoming Packets Using ECN and Color-Marking................................................................................... 692
Sample conguration to mark non-ecn packets as “yellow” with single trac class.................................................693
Applying Layer 2 Match Criteria on a Layer 3 Interface............................................................................................695
Applying DSCP and VLAN Match Criteria on a Service Queue................................................................................ 695
Enabling Buer Statistics Tracking ................................................................................................................................696
44 Routing Information Protocol (RIP)...........................................................................699
Protocol Overview......................................................................................................................................................... 699
23