Deployment Guide

Priority-Based Flow Control................................................................................................................................... 239
Enhanced Transmission Selection.........................................................................................................................240
Data Center Bridging Exchange Protocol (DCBx).............................................................................................241
Data Center Bridging in a Traffic Flow................................................................................................................ 242
Enabling Data Center Bridging.....................................................................................................................................242
DCB Maps and its Attributes..................................................................................................................................243
Data Center Bridging: Default Configuration........................................................................................................... 243
Configuring Priority-Based Flow Control.................................................................................................................. 244
Configuring Lossless Queues................................................................................................................................. 244
Configuring PFC in a DCB Map................................................................................................................................... 246
Applying a DCB Map on a Port.................................................................................................................................... 247
Configuring PFC without a DCB Map........................................................................................................................ 248
Configuring PFC Asymmetric.......................................................................................................................................249
Priority-Based Flow Control Using Dynamic Buffer Method............................................................................... 250
Behavior of Tagged Packets.........................................................................................................................................251
Configuration Example for DSCP and PFC Priorities..............................................................................................251
SNMP Support for PFC and Buffer Statistics Tracking........................................................................................252
Performing PFC Using DSCP Bits Instead of 802.1p Bits.....................................................................................252
PFC and ETS Configuration Examples.......................................................................................................................254
Using PFC to Manage Converged Ethernet Traffic...............................................................................................254
Operations on Untagged Packets...............................................................................................................................254
Generation of PFC for a Priority for Untagged Packets.......................................................................................254
Configure Enhanced Transmission Selection........................................................................................................... 254
ETS Prerequisites and Restrictions...................................................................................................................... 255
Creating an ETS Priority Group.............................................................................................................................255
ETS Operation with DCBx...................................................................................................................................... 256
Configuring Bandwidth Allocation for DCBx CIN.............................................................................................. 256
Configuring ETS in a DCB Map..............................................................................................................................257
Hierarchical Scheduling in ETS Output Policies...................................................................................................... 258
Using ETS to Manage Converged Ethernet Traffic............................................................................................... 258
Applying DCB Policies in a Switch Stack.................................................................................................................. 259
Configure a DCBx Operation........................................................................................................................................259
DCBx Operation.........................................................................................................................................................259
DCBx Port Roles........................................................................................................................................................259
DCB Configuration Exchange................................................................................................................................. 261
Configuration Source Election................................................................................................................................261
Propagation of DCB Information............................................................................................................................261
Auto-Detection and Manual Configuration of the DCBx Version..................................................................262
DCBx Example............................................................................................................................................................262
DCBx Prerequisites and Restrictions................................................................................................................... 263
Configuring DCBx......................................................................................................................................................263
Verifying the DCB Configuration.................................................................................................................................266
QoS dot1p Traffic Classification and Queue Assignment...................................................................................... 274
Configuring the Dynamic Buffer Method.................................................................................................................. 275
Sample DCB Configuration........................................................................................................................................... 275
Chapter 12: Dynamic Host Configuration Protocol (DHCP)........................................................ 278
DHCP Packet Format and Options.............................................................................................................................278
Assign an IP Address using DHCP.............................................................................................................................. 279
Implementation Information......................................................................................................................................... 280
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