Users Guide

Congure Control Plane Policing.................................................................................................................................... 238
Conguring CoPP for Protocols.....................................................................................................................................239
Conguring CoPP for CPU Queues................................................................................................................................240
Show Commands............................................................................................................................................................241
14 Data Center Bridging (DCB)...................................................................................... 243
Ethernet Enhancements in Data Center Bridging........................................................................................................... 243
Priority-Based Flow Control..................................................................................................................................... 244
Enhanced Transmission Selection.............................................................................................................................245
Data Center Bridging Exchange Protocol (DCBx).................................................................................................... 246
Data Center Bridging in a Trac Flow...................................................................................................................... 246
Enabling Data Center Bridging........................................................................................................................................246
DCB Maps and its Attributes.................................................................................................................................... 247
Data Center Bridging: Default Conguration...................................................................................................................248
Conguring Priority-Based Flow Control........................................................................................................................ 248
Conguring Lossless Queues....................................................................................................................................249
Conguring PFC in a DCB Map......................................................................................................................................250
PFC Conguration Notes.........................................................................................................................................250
PFC Prerequisites and Restrictions........................................................................................................................... 251
Applying a DCB Map on a Port........................................................................................................................................251
Conguring PFC without a DCB Map............................................................................................................................ 252
Conguring Lossless QueuesExample:..................................................................................................................... 252
Priority-Based Flow Control Using Dynamic Buer Method...........................................................................................254
Pause and Resume of Trac....................................................................................................................................254
Buer Sizes for Lossless or PFC Packets.................................................................................................................254
Behavior of Tagged Packets...........................................................................................................................................255
Conguration Example for DSCP and PFC Priorities......................................................................................................255
Using PFC to Manage Converged Ethernet Trac........................................................................................................ 256
Congure Enhanced Transmission Selection.................................................................................................................. 256
ETS Prerequisites and Restrictions...........................................................................................................................256
Creating an ETS Priority Group................................................................................................................................ 256
ETS Operation with DCBx........................................................................................................................................257
Conguring Bandwidth Allocation for DCBx CIN......................................................................................................258
Conguring ETS in a DCB Map................................................................................................................................ 259
Hierarchical Scheduling in ETS Output Policies.............................................................................................................. 260
Using ETS to Manage Converged Ethernet Trac.........................................................................................................260
Applying DCB Policies in a Switch Stack......................................................................................................................... 261
Congure a DCBx Operation...........................................................................................................................................261
DCBx Operation........................................................................................................................................................261
DCBx Port Roles.......................................................................................................................................................261
DCB Conguration Exchange...................................................................................................................................263
Conguration Source Election..................................................................................................................................263
Propagation of DCB Information.............................................................................................................................. 264
Auto-Detection and Manual Conguration of the DCBx Version.............................................................................. 264
DCBx Example......................................................................................................................................................... 264
DCBx Prerequisites and Restrictions........................................................................................................................265
10