Users Guide

PFC Conguration Notes........................................................................................................................................240
PFC Prerequisites and Restrictions........................................................................................................................241
Applying a DCB Map on a Port.....................................................................................................................................241
Conguring PFC without a DCB Map.........................................................................................................................242
Conguring Lossless QueuesExample:..................................................................................................................242
Priority-Based Flow Control Using Dynamic Buer Method....................................................................................244
Pause and Resume of Trac..................................................................................................................................244
Buer Sizes for Lossless or PFC Packets.............................................................................................................244
Behavior of Tagged Packets.........................................................................................................................................245
Conguration Example for DSCP and PFC Priorities................................................................................................245
SNMP Support for PFC and Buer Statistics Tracking............................................................................................246
Performing PFC Using DSCP Bits Instead of 802.1p Bits.........................................................................................246
PFC and ETS Conguration Examples........................................................................................................................247
Using PFC to Manage Converged Ethernet Trac...................................................................................................247
Operations on Untagged Packets................................................................................................................................ 247
Generation of PFC for a Priority for Untagged Packets...........................................................................................248
Congure Enhanced Transmission Selection..............................................................................................................248
ETS Prerequisites and Restrictions........................................................................................................................248
Creating an ETS Priority Group..............................................................................................................................248
ETS Operation with DCBx...................................................................................................................................... 249
Conguring Bandwidth Allocation for DCBx CIN................................................................................................ 250
Conguring ETS in a DCB Map.............................................................................................................................. 251
Hierarchical Scheduling in ETS Output Policies......................................................................................................... 252
Using ETS to Manage Converged Ethernet Trac...................................................................................................252
Applying DCB Policies in a Switch Stack.................................................................................................................... 253
Congure a DCBx Operation........................................................................................................................................253
DCBx Operation.......................................................................................................................................................253
DCBx Port Roles...................................................................................................................................................... 253
DCB Conguration Exchange................................................................................................................................ 255
Conguration Source Election............................................................................................................................... 255
Propagation of DCB Information........................................................................................................................... 256
Auto-Detection and Manual Conguration of the DCBx Version...................................................................... 256
DCBx Example......................................................................................................................................................... 256
DCBx Prerequisites and Restrictions.....................................................................................................................257
Conguring DCBx.................................................................................................................................................... 257
Verifying the DCB Conguration.................................................................................................................................. 261
QoS dot1p Trac Classication and Queue Assignment..........................................................................................269
Conguring the Dynamic Buer Method....................................................................................................................270
Sample DCB Conguration............................................................................................................................................271
PFC and ETS Conguration Command Examples...............................................................................................272
12 Dynamic Host Conguration Protocol (DHCP)......................................................................................... 273
DHCP Packet Format and Options..............................................................................................................................273
Assign an IP Address using DHCP............................................................................................................................... 275
Implementation Information..........................................................................................................................................276
Congure the System to be a DHCP Server..............................................................................................................276
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