Users Guide

Conguring Priority-Based Flow Control.................................................................................................................... 236
Conguring Lossless Queues..................................................................................................................................237
Conguring PFC in a DCB Map................................................................................................................................... 238
PFC Conguration Notes........................................................................................................................................238
PFC Prerequisites and Restrictions.......................................................................................................................239
Applying a DCB Map on a Port.................................................................................................................................... 239
Conguring PFC without a DCB Map.........................................................................................................................240
Conguring Lossless QueuesExample:..................................................................................................................240
Priority-Based Flow Control Using Dynamic Buer Method.................................................................................... 241
Pause and Resume of Trac...................................................................................................................................241
Buer Sizes for Lossless or PFC Packets.............................................................................................................242
Behavior of Tagged Packets.........................................................................................................................................242
Conguration Example for DSCP and PFC Priorities................................................................................................243
Using PFC to Manage Converged Ethernet Trac...................................................................................................243
Congure Enhanced Transmission Selection..............................................................................................................244
ETS Prerequisites and Restrictions........................................................................................................................244
Creating an ETS Priority Group..............................................................................................................................244
ETS Operation with DCBx...................................................................................................................................... 245
Conguring Bandwidth Allocation for DCBx CIN.................................................................................................246
Conguring ETS in a DCB Map..............................................................................................................................246
Hierarchical Scheduling in ETS Output Policies......................................................................................................... 248
Using ETS to Manage Converged Ethernet Trac...................................................................................................248
Applying DCB Policies in a Switch Stack.................................................................................................................... 248
Congure a DCBx Operation........................................................................................................................................248
DCBx Operation....................................................................................................................................................... 249
DCBx Port Roles...................................................................................................................................................... 249
DCB Conguration Exchange................................................................................................................................ 250
Conguration Source Election................................................................................................................................ 251
Propagation of DCB Information............................................................................................................................ 251
Auto-Detection and Manual Conguration of the DCBx Version....................................................................... 251
DCBx Example..........................................................................................................................................................252
DCBx Prerequisites and Restrictions.....................................................................................................................252
Conguring DCBx....................................................................................................................................................253
Verifying the DCB Conguration................................................................................................................................. 256
Sample DCB Conguration...........................................................................................................................................264
PFC and ETS Conguration Command Examples...............................................................................................266
QoS dot1p Trac Classication and Queue Assignment..........................................................................................266
Conguring the Dynamic Buer Method....................................................................................................................267
13 Dynamic Host Conguration Protocol (DHCP)......................................................................................... 269
DHCP Packet Format and Options............................................................................................................................. 269
Assign an IP Address using DHCP................................................................................................................................271
Implementation Information..........................................................................................................................................272
Congure the System to be a DHCP Server..............................................................................................................272
Conguring the Server for Automatic Address Allocation.................................................................................. 273
Specifying a Default Gateway.................................................................................................................................274
Congure a Method of Hostname Resolution......................................................................................................274
Contents
9