Concept Guide

QoS CAM Region Limitation...................................................................................................................................243
11 Control Plane Policing (CoPP).................................................................................................................. 245
Congure Control Plane Policing................................................................................................................................. 246
Conguring CoPP for Protocols.............................................................................................................................247
Conguring CoPP for CPU Queues...................................................................................................................... 249
CoPP for OSPFv3 Packets.................................................................................................................................... 250
Conguring CoPP for OSPFv3.............................................................................................................................. 253
Displaying CoPP Conguration ............................................................................................................................. 253
12 Data Center Bridging (DCB).....................................................................................................................256
Ethernet Enhancements in Data Center Bridging..................................................................................................... 256
Priority-Based Flow Control................................................................................................................................... 257
Enhanced Transmission Selection..........................................................................................................................258
Data Center Bridging Exchange Protocol (DCBx)...............................................................................................259
Data Center Bridging in a Trac Flow.................................................................................................................. 260
Enabling Data Center Bridging.....................................................................................................................................260
DCB Maps and its Attributes.................................................................................................................................. 261
Data Center Bridging: Default Conguration..............................................................................................................262
Conguring Priority-Based Flow Control....................................................................................................................262
Conguring Lossless Queues................................................................................................................................. 263
Conguring PFC in a DCB Map................................................................................................................................... 264
PFC Conguration Notes........................................................................................................................................264
PFC Prerequisites and Restrictions.......................................................................................................................265
Applying a DCB Map on a Port....................................................................................................................................265
Conguring PFC without a DCB Map.........................................................................................................................266
Conguring Lossless QueuesExample:..................................................................................................................266
Priority-Based Flow Control Using Dynamic Buer Method....................................................................................267
Pause and Resume of Trac..................................................................................................................................268
Buer Sizes for Lossless or PFC Packets............................................................................................................ 268
Behavior of Tagged Packets.........................................................................................................................................268
Conguration Example for DSCP and PFC Priorities................................................................................................269
Using PFC to Manage Converged Ethernet Trac...................................................................................................270
Congure Enhanced Transmission Selection..............................................................................................................270
ETS Prerequisites and Restrictions........................................................................................................................270
Creating an ETS Priority Group..............................................................................................................................270
ETS Operation with DCBx.......................................................................................................................................271
Conguring Bandwidth Allocation for DCBx CIN.................................................................................................272
Conguring ETS in a DCB Map..............................................................................................................................273
Hierarchical Scheduling in ETS Output Policies..........................................................................................................274
Using ETS to Manage Converged Ethernet Trac................................................................................................... 274
Applying DCB Policies in a Switch Stack.................................................................................................................... 275
Congure a DCBx Operation........................................................................................................................................275
DCBx Operation....................................................................................................................................................... 275
DCBx Port Roles...................................................................................................................................................... 275
DCB Conguration Exchange.................................................................................................................................277
Contents
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