Concept Guide

Data Center Bridging: Default Conguration..............................................................................................................270
Conguring Priority-Based Flow Control.................................................................................................................... 270
Conguring Lossless Queues........................................................................................................................................ 271
Conguring PFC in a DCB Map....................................................................................................................................273
PFC Conguration Notes........................................................................................................................................273
PFC Prerequisites and Restrictions....................................................................................................................... 274
Conguring PFC without a DCB Map......................................................................................................................... 274
Conguring Lossless QueuesExample:.................................................................................................................. 274
Priority-Based Flow Control Using Dynamic Buer Method..............................................................................276
Behavior of Tagged Packets......................................................................................................................................... 277
Conguration Example for DSCP and PFC Priorities................................................................................................ 277
SNMP Support for PFC and Buer Statistics Tracking............................................................................................278
Performing PFC Using DSCP Bits Instead of 802.1p Bits.........................................................................................279
PFC and ETS Conguration Examples........................................................................................................................280
Using PFC to Manage Converged Ethernet Trac.................................................................................................. 280
Operations on Untagged Packets................................................................................................................................280
Generation of PFC for a Priority for Untagged Packets............................................................................................281
Congure Enhanced Transmission Selection.............................................................................................................. 281
ETS Prerequisites and Restrictions........................................................................................................................ 281
Creating an ETS Priority Group.............................................................................................................................. 281
ETS Operation with DCBx...................................................................................................................................... 282
Conguring Bandwidth Allocation for DCBx CIN.................................................................................................283
Conguring ETS in a DCB Map..............................................................................................................................284
Hierarchical Scheduling in ETS Output Policies.........................................................................................................285
Using ETS to Manage Converged Ethernet Trac...................................................................................................285
Applying DCB Policies in a Switch Stack.................................................................................................................... 286
Congure a DCBx Operation........................................................................................................................................286
DCBx Operation.......................................................................................................................................................286
DCBx Port Roles...................................................................................................................................................... 286
DCB Conguration Exchange................................................................................................................................ 288
Conguration Source Election................................................................................................................................288
Propagation of DCB Information............................................................................................................................289
Auto-Detection and Manual Conguration of the DCBx Version...................................................................... 289
DCBx Example......................................................................................................................................................... 289
DCBx Prerequisites and Restrictions.....................................................................................................................290
Conguring DCBx....................................................................................................................................................290
Verifying the DCB Conguration................................................................................................................................. 294
QoS dot1p Trac Classication and Queue Assignment..........................................................................................302
Conguring the Dynamic Buer Method................................................................................................................... 303
Sample DCB Conguration...........................................................................................................................................304
PFC and ETS Conguration Command Examples.............................................................................................. 306
13 Dynamic Host Conguration Protocol (DHCP)......................................................................................... 307
DHCP Packet Format and Options..............................................................................................................................307
Assign an IP Address using DHCP...............................................................................................................................309
Implementation Information.......................................................................................................................................... 310
Contents
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