Users Guide
DCB Map: Configuration Procedure.......................................................................................... 279
Important Points to Remember..................................................................................................279
Applying a DCB Map on a Port...................................................................................................280
Configuring PFC without a DCB Map.........................................................................................281
Configuring Lossless Queues..................................................................................................... 281
Applying a DCB Map on a Line Card..........................................................................................282
Data Center Bridging: Default Configuration..................................................................................283
Configuration Notes: PFC and ETS in a DCB Map.......................................................................... 283
PFC Configuration Notes............................................................................................................283
ETS Configuration Notes............................................................................................................284
ETS Prerequisites and Restrictions............................................................................................. 285
Priority-Group Configuration Notes..........................................................................................286
Configuring Priority-Based Flow Control........................................................................................286
Configuring Lossless Queues..................................................................................................... 287
Configuring Enhanced Transmission Selection.............................................................................. 288
Creating an ETS Priority Group.................................................................................................. 288
ETS Operation with DCBx.......................................................................................................... 289
Configure a DCBx Operation...........................................................................................................290
DCBx Operation..........................................................................................................................290
DCBx Port Roles......................................................................................................................... 290
DCB Configuration Exchange.................................................................................................... 292
Configuration Source Election...................................................................................................292
Propagation of DCB Information............................................................................................... 293
Auto-Detection and Manual Configuration of the DCBx Version............................................ 293
Behavior of Tagged Packets.......................................................................................................294
Configuration Example for DSCP and PFC Priorities................................................................ 294
DCBx Example.............................................................................................................................295
DCBx Prerequisites and Restrictions..........................................................................................296
Configuring DCBx....................................................................................................................... 297
Verifying the DCB Configuration......................................................................................................301
Performing PFC Using DSCP Bits Instead of 802.1p Bits.................................................................312
PFC and ETS Configuration Examples..............................................................................................312
Using PFC and ETS to Manage Data Center Traffic.........................................................................313
PFC and ETS Configuration Command Examples.....................................................................314
Using PFC and ETS to Manage Converged Ethernet Traffic......................................................315
Hierarchical Scheduling in ETS Output Policies.........................................................................315
Priority-Based Flow Control Using Dynamic Buffer Method.......................................................... 315
Pause and Resume of Traffic...................................................................................................... 316
Buffer Sizes for Lossless or PFC Packets....................................................................................316
Configuring the Dynamic Buffer Method.........................................................................................317
12 Debugging and Diagnostics......................................................................... 319
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