Administrator Guide

PFC Conguration Notes........................................................................................................................................ 241
PFC Prerequisites and Restrictions....................................................................................................................... 242
Applying a DCB Map on a Port.................................................................................................................................... 242
Conguring PFC without a DCB Map.........................................................................................................................243
Conguring Lossless QueuesExample:..................................................................................................................243
Priority-Based Flow Control Using Dynamic Buer Method....................................................................................245
Pause and Resume of Trac..................................................................................................................................245
Buer Sizes for Lossless or PFC Packets............................................................................................................ 245
Behavior of Tagged Packets.........................................................................................................................................246
Conguration Example for DSCP and PFC Priorities................................................................................................246
SNMP Support for PFC and Buer Statistics Tracking............................................................................................247
Performing PFC Using DSCP Bits Instead of 802.1p Bits.........................................................................................247
PFC and ETS Conguration Examples........................................................................................................................248
Using PFC to Manage Converged Ethernet Trac...................................................................................................248
Operations on Untagged Packets................................................................................................................................248
Generation of PFC for a Priority for Untagged Packets...........................................................................................249
Congure Enhanced Transmission Selection..............................................................................................................249
ETS Prerequisites and Restrictions....................................................................................................................... 249
Creating an ETS Priority Group..............................................................................................................................249
ETS Operation with DCBx......................................................................................................................................250
Conguring Bandwidth Allocation for DCBx CIN................................................................................................. 251
Conguring ETS in a DCB Map..............................................................................................................................252
Hierarchical Scheduling in ETS Output Policies.........................................................................................................253
Using ETS to Manage Converged Ethernet Trac...................................................................................................253
Applying DCB Policies in a Switch Stack.................................................................................................................... 254
Congure a DCBx Operation........................................................................................................................................254
DCBx Operation.......................................................................................................................................................254
DCBx Port Roles...................................................................................................................................................... 254
DCB Conguration Exchange................................................................................................................................ 256
Conguration Source Election............................................................................................................................... 256
Propagation of DCB Information............................................................................................................................257
Auto-Detection and Manual Conguration of the DCBx Version.......................................................................257
DCBx Example..........................................................................................................................................................257
DCBx Prerequisites and Restrictions.....................................................................................................................258
Conguring DCBx....................................................................................................................................................258
Verifying the DCB Conguration................................................................................................................................. 262
QoS dot1p Trac Classication and Queue Assignment.......................................................................................... 270
Conguring the Dynamic Buer Method.................................................................................................................... 271
Sample DCB Conguration........................................................................................................................................... 272
PFC and ETS Conguration Command Examples...............................................................................................273
12 Dynamic Host Conguration Protocol (DHCP)......................................................................................... 274
DHCP Packet Format and Options..............................................................................................................................274
Assign an IP Address using DHCP............................................................................................................................... 276
Implementation Information.......................................................................................................................................... 277
Congure the System to be a DHCP Server.............................................................................................................. 277
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