Service Manual

Enhanced Transmission Selection..............................................................................................275
Data Center Bridging Exchange Protocol (DCBx)..................................................................... 276
Data Center Bridging in a Traffic Flow....................................................................................... 277
Priority-Based Flow Control............................................................................................................. 277
Enhanced Transmission Selection................................................................................................... 278
Data Center Bridging Exchange Protocol (DCBx)........................................................................... 279
Data Center Bridging in a Traffic Flow.............................................................................................280
Enabling Data Center Bridging.........................................................................................................280
DCB Maps and its Attributes....................................................................................................... 281
Data Center Bridging: Default Configuration..................................................................................282
Configuring Priority-Based Flow Control........................................................................................282
Configuring Lossless Queues.....................................................................................................283
Configuring PFC in a DCB Map........................................................................................................285
PFC Configuration Notes............................................................................................................285
PFC Prerequisites and Restrictions.............................................................................................286
Applying a DCB Map on a Port.........................................................................................................286
Configuring PFC without a DCB Map.............................................................................................. 287
Configuring Lossless QueuesExample:......................................................................................288
Priority-Based Flow Control Using Dynamic Buffer Method..........................................................289
Pause and Resume of Traffic......................................................................................................289
Buffer Sizes for Lossless or PFC Packets................................................................................... 290
Behavior of Tagged Packets.............................................................................................................290
Configuration Example for DSCP and PFC Priorities.......................................................................291
Using PFC to Manage Converged Ethernet Traffic......................................................................... 292
Configure Enhanced Transmission Selection..................................................................................292
ETS Prerequisites and Restrictions............................................................................................. 292
Creating an ETS Priority Group.................................................................................................. 293
ETS Operation with DCBx.......................................................................................................... 294
Configuring Bandwidth Allocation for DCBx CIN..................................................................... 294
Configuring ETS in a DCB Map...................................................................................................295
Hierarchical Scheduling in ETS Output Policies.............................................................................. 297
Using ETS to Manage Converged Ethernet Traffic..........................................................................298
Applying DCB Policies in a Switch Stack......................................................................................... 298
Configure a DCBx Operation........................................................................................................... 298
DCBx Operation..........................................................................................................................298
DCBx Port Roles..........................................................................................................................299
DCB Configuration Exchange....................................................................................................300
Configuration Source Election................................................................................................... 301
Propagation of DCB Information................................................................................................301
Auto-Detection and Manual Configuration of the DCBx Version............................................302
DCBx Example............................................................................................................................ 302
DCBx Prerequisites and Restrictions..........................................................................................303
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