Concept Guide

Data Center Bridging: Default Conguration..............................................................................................................275
Conguring Priority-Based Flow Control.................................................................................................................... 275
Conguring Lossless Queues........................................................................................................................................276
Conguring PFC in a DCB Map....................................................................................................................................278
PFC Conguration Notes........................................................................................................................................278
PFC Prerequisites and Restrictions....................................................................................................................... 279
Conguring PFC without a DCB Map.........................................................................................................................279
Conguring Lossless QueuesExample:..................................................................................................................279
Priority-Based Flow Control Using Dynamic Buer Method.............................................................................. 281
Behavior of Tagged Packets.........................................................................................................................................282
Conguration Example for DSCP and PFC Priorities................................................................................................282
SNMP Support for PFC and Buer Statistics Tracking............................................................................................283
Performing PFC Using DSCP Bits Instead of 802.1p Bits.........................................................................................284
PFC and ETS Conguration Examples........................................................................................................................285
Using PFC to Manage Converged Ethernet Trac.................................................................................................. 285
Operations on Untagged Packets................................................................................................................................285
Generation of PFC for a Priority for Untagged Packets...........................................................................................286
Congure Enhanced Transmission Selection..............................................................................................................286
ETS Prerequisites and Restrictions....................................................................................................................... 286
Creating an ETS Priority Group..............................................................................................................................286
ETS Operation with DCBx...................................................................................................................................... 287
Conguring Bandwidth Allocation for DCBx CIN.................................................................................................288
Conguring ETS in a DCB Map..............................................................................................................................289
Hierarchical Scheduling in ETS Output Policies.........................................................................................................290
Using ETS to Manage Converged Ethernet Trac...................................................................................................290
Applying DCB Policies in a Switch Stack.....................................................................................................................291
Congure a DCBx Operation.........................................................................................................................................291
DCBx Operation........................................................................................................................................................291
DCBx Port Roles.......................................................................................................................................................291
DCB Conguration Exchange................................................................................................................................ 293
Conguration Source Election................................................................................................................................293
Propagation of DCB Information............................................................................................................................294
Auto-Detection and Manual Conguration of the DCBx Version...................................................................... 294
DCBx Example......................................................................................................................................................... 294
DCBx Prerequisites and Restrictions.....................................................................................................................295
Conguring DCBx....................................................................................................................................................295
Verifying the DCB Conguration................................................................................................................................. 299
QoS dot1p Trac Classication and Queue Assignment.......................................................................................... 307
Conguring the Dynamic Buer Method................................................................................................................... 308
Sample DCB Conguration...........................................................................................................................................309
PFC and ETS Conguration Command Examples................................................................................................ 311
13 Dynamic Host Conguration Protocol (DHCP)..........................................................................................312
DHCP Packet Format and Options.............................................................................................................................. 312
Assign an IP Address using DHCP................................................................................................................................314
Implementation Information.......................................................................................................................................... 315
Contents
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