Dell S4820T User Manual

Priority-Based Flow Control.......................................................................................................284
Enhanced Transmission Selection............................................................................................. 285
Data Center Bridging Exchange Protocol (DCBx)..................................................................... 286
Data Center Bridging in a Traffic Flow....................................................................................... 287
Enabling Data Center Bridging.........................................................................................................287
DCB Maps and its Attributes.......................................................................................................288
Data Center Bridging: Default Configuration..................................................................................289
Configuring Priority-Based Flow Control........................................................................................290
Configuring Lossless Queues..................................................................................................... 291
Configuring PFC in a DCB Map........................................................................................................292
PFC Configuration Notes............................................................................................................292
PFC Prerequisites and Restrictions.............................................................................................293
Applying a DCB Map on a Port.........................................................................................................294
Configuring PFC without a DCB Map..............................................................................................294
Configuring Lossless QueuesExample:......................................................................................295
Priority-Based Flow Control Using Dynamic Buffer Method..........................................................296
Pause and Resume of Traffic......................................................................................................297
Buffer Sizes for Lossless or PFC Packets....................................................................................297
Behavior of Tagged Packets.............................................................................................................298
Configuration Example for DSCP and PFC Priorities...................................................................... 298
Using PFC to Manage Converged Ethernet Traffic......................................................................... 299
Configure Enhanced Transmission Selection................................................................................. 299
ETS Prerequisites and Restrictions.............................................................................................300
Creating an ETS Priority Group..................................................................................................300
ETS Operation with DCBx...........................................................................................................301
Configuring Bandwidth Allocation for DCBx CIN..................................................................... 302
Configuring ETS in a DCB Map...................................................................................................303
Hierarchical Scheduling in ETS Output Policies..............................................................................304
Using ETS to Manage Converged Ethernet Traffic..........................................................................305
Applying DCB Policies in a Switch Stack......................................................................................... 305
Configure a DCBx Operation...........................................................................................................306
DCBx Operation..........................................................................................................................306
DCBx Port Roles......................................................................................................................... 306
DCB Configuration Exchange....................................................................................................308
Configuration Source Election...................................................................................................308
Propagation of DCB Information...............................................................................................309
Auto-Detection and Manual Configuration of the DCBx Version............................................309
DCBx Example.............................................................................................................................310
DCBx Prerequisites and Restrictions...........................................................................................311
Configuring DCBx........................................................................................................................311
Verifying the DCB Configuration......................................................................................................315
Sample DCB Configuration.............................................................................................................. 326
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Dell S4820T Specifications

General

Brand	Dell
Model	S4820T
Category	Switch
Language	English