Users Guide

Data Center Bridging in a Traffic Flow.........................................................................305
Enabling Data Center Bridging............................................................................................305
DCB Maps and its Attributes.......................................................................................... 306
Data Center Bridging: Default Configuration.................................................................. 307
Configuring Priority-Based Flow Control.........................................................................308
Configuring Lossless Queues........................................................................................309
Configuring PFC in a DCB Map...........................................................................................310
PFC Configuration Notes................................................................................................310
PFC Prerequisites and Restrictions................................................................................311
Applying a DCB Map on a Port............................................................................................ 312
Configuring PFC without a DCB Map................................................................................ 312
Configuring Lossless QueuesExample:........................................................................313
Priority-Based Flow Control Using Dynamic Buffer Method........................................315
Pause and Resume of Traffic..........................................................................................315
Buffer Sizes for Lossless or PFC Packets..................................................................... 315
Behavior of Tagged Packets.................................................................................................316
Configuration Example for DSCP and PFC Priorities...................................................... 317
Using PFC to Manage Converged Ethernet Traffic.........................................................318
Configure Enhanced Transmission Selection.................................................................. 318
ETS Prerequisites and Restrictions................................................................................318
Creating an ETS Priority Group......................................................................................318
ETS Operation with DCBx.............................................................................................. 320
Configuring Bandwidth Allocation for DCBx CIN.....................................................320
Configuring ETS in a DCB Map......................................................................................321
Hierarchical Scheduling in ETS Output Policies.............................................................. 323
Using ETS to Manage Converged Ethernet Traffic......................................................... 324
Applying DCB Policies in a Switch Stack...........................................................................324
Configure a DCBx Operation.............................................................................................. 324
DCBx Operation................................................................................................................325
DCBx Port Roles............................................................................................................... 325
DCB Configuration Exchange........................................................................................327
Configuration Source Election...................................................................................... 327
Propagation of DCB Information..................................................................................328
Auto-Detection and Manual Configuration of the DCBx Version.........................328
DCBx Example.................................................................................................................. 329
DCBx Prerequisites and Restrictions............................................................................329
Configuring DCBx............................................................................................................330
Verifying the DCB Configuration........................................................................................334
Sample DCB Configuration................................................................................................. 344
PFC and ETS Configuration Command Examples....................................................346
QoS dot1p Traffic Classification and Queue Assignment............................................. 347
Configuring the Dynamic Buffer Method......................................................................... 348
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