Concept Guide

Table Of Contents
CAM Optimization......................................................................................................................................................... 246
Troubleshoot CAM Proling..........................................................................................................................................247
QoS CAM Region Limitation...................................................................................................................................247
11 Control Plane Policing (CoPP).................................................................................................................. 248
Congure Control Plane Policing................................................................................................................................. 249
Conguring CoPP for Protocols............................................................................................................................ 250
Conguring CoPP for CPU Queues...................................................................................................................... 252
CoPP for OSPFv3 Packets.....................................................................................................................................253
Conguring CoPP for OSPFv3.............................................................................................................................. 256
Displaying CoPP Conguration .............................................................................................................................256
12 Data Center Bridging (DCB)..................................................................................................................... 259
Ethernet Enhancements in Data Center Bridging..................................................................................................... 259
Priority-Based Flow Control................................................................................................................................... 260
Enhanced Transmission Selection.......................................................................................................................... 261
Data Center Bridging Exchange Protocol (DCBx)...............................................................................................262
Data Center Bridging in a Trac Flow...................................................................................................................263
Enabling Data Center Bridging..................................................................................................................................... 263
DCB Maps and its Attributes..................................................................................................................................264
QoS dot1p Trac Classication and Queue Assignment..........................................................................................265
Data Center Bridging: Default Conguration..............................................................................................................266
Conguring Priority-Based Flow Control....................................................................................................................266
Conguring Lossless Queues..................................................................................................................................267
Conguring PFC in a DCB Map................................................................................................................................... 268
PFC Conguration Notes........................................................................................................................................268
PFC Prerequisites and Restrictions.......................................................................................................................269
Applying a DCB Map on a Port....................................................................................................................................269
Priority-Based Flow Control Using Dynamic Buer Method....................................................................................270
Pause and Resume of Trac..................................................................................................................................270
Buer Sizes for Lossless or PFC Packets.............................................................................................................270
Conguring PFC without a DCB Map..........................................................................................................................271
Conguring Lossless QueuesExample:...................................................................................................................271
Behavior of Tagged Packets......................................................................................................................................... 273
Conguration Example for DSCP and PFC Priorities................................................................................................ 273
Using PFC to Manage Converged Ethernet Trac...................................................................................................274
Congure Enhanced Transmission Selection..............................................................................................................274
ETS Prerequisites and Restrictions........................................................................................................................274
Creating an ETS Priority Group..............................................................................................................................275
ETS Operation with DCBx...................................................................................................................................... 276
Conguring Bandwidth Allocation for DCBx CIN.................................................................................................276
Conguring ETS in a DCB Map..............................................................................................................................277
Hierarchical Scheduling in ETS Output Policies................................................................................................... 278
Using ETS to Manage Converged Ethernet Trac............................................................................................. 279
Applying DCB Policies in a Switch Stack.................................................................................................................... 279
Congure a DCBx Operation........................................................................................................................................ 279
Contents
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