Concept Guide

PVST+ in Multi-Vendor Networks................................................................................................................................794
Enabling PVST+ Extend System ID............................................................................................................................. 794
PVST+ Sample Congurations.....................................................................................................................................795
45 Quality of Service (QoS)..........................................................................................................................798
Implementation Information......................................................................................................................................... 800
Port-Based QoS Congurations.................................................................................................................................. 800
Setting dot1p Priorities for Incoming Trac.........................................................................................................800
Honoring dot1p Priorities on Ingress Trac.......................................................................................................... 801
Conguring Port-Based Rate Policing.................................................................................................................. 802
Conguring Port-Based Rate Shaping..................................................................................................................802
Policy-Based QoS Congurations................................................................................................................................803
Classify Trac..........................................................................................................................................................803
Create a QoS Policy.................................................................................................................................................807
Create Policy Maps................................................................................................................................................. 809
DSCP Color Maps.......................................................................................................................................................... 813
Creating a DSCP Color Map................................................................................................................................... 813
Displaying DSCP Color Maps..................................................................................................................................814
Displaying a DSCP Color Policy Conguration .....................................................................................................814
Enabling QoS Rate Adjustment.................................................................................................................................... 815
Enabling Strict-Priority Queueing.................................................................................................................................815
Weighted Random Early Detection.............................................................................................................................. 816
Creating WRED Proles...........................................................................................................................................817
Applying a WRED Prole to Trac......................................................................................................................... 817
Displaying Default and Congured WRED Proles...............................................................................................817
Displaying WRED Drop Statistics............................................................................................................................817
Displaying egress–queue Statistics........................................................................................................................818
Pre-Calculating Available QoS CAM Space.................................................................................................................818
Conguring Weights and ECN for WRED .................................................................................................................. 819
Global Service Pools With WRED and ECN Settings.......................................................................................... 819
Conguring WRED and ECN Attributes..................................................................................................................... 820
Guidelines for Conguring ECN for Classifying and Color-Marking Packets..........................................................821
Sample conguration to mark non-ecn packets as “yellow” with Multiple trac class..................................822
Classifying Incoming Packets Using ECN and Color-Marking............................................................................822
Sample conguration to mark non-ecn packets as “yellow” with single trac class......................................824
Applying Layer 2 Match Criteria on a Layer 3 Interface............................................................................................825
Applying DSCP and VLAN Match Criteria on a Service Queue...............................................................................825
Classifying Incoming Packets Using ECN and Color-Marking................................................................................. 826
Guidelines for Conguring ECN for Classifying and Color-Marking Packets......................................................... 828
Sample conguration to mark non-ecn packets as “yellow” with Multiple trac class........................................829
Sample conguration to mark non-ecn packets as “yellow” with single trac class............................................829
Enabling Buer Statistics Tracking .............................................................................................................................830
46 Routing Information Protocol (RIP)......................................................................................................... 833
Protocol Overview.........................................................................................................................................................833
RIPv1..........................................................................................................................................................................833
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