Users Guide

Conguring Priority-Based Flow Control.....................................................................................................................241
Conguring Lossless Queues................................................................................................................................. 242
Conguring PFC in a DCB Map................................................................................................................................... 243
PFC Conguration Notes........................................................................................................................................243
PFC Prerequisites and Restrictions....................................................................................................................... 244
Applying a DCB Map on a Port.................................................................................................................................... 244
Conguring PFC without a DCB Map.........................................................................................................................245
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.............................................................................................................246
Behavior of Tagged Packets.........................................................................................................................................246
SNMP Support for PFC and Buer Statistics Tracking............................................................................................247
Performing PFC Using DSCP Bits Instead of 802.1p Bits.........................................................................................247
Conguration Example for DSCP and PFC Priorities................................................................................................248
Using PFC to Manage Converged Ethernet Trac...................................................................................................249
Generation of PFC for a Priority for Untagged Packets...........................................................................................249
Congure Enhanced Transmission Selection..............................................................................................................249
Creating an ETS Priority Group..............................................................................................................................249
ETS Operation with DCBx......................................................................................................................................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..........................................................................................268
Conguring the Dynamic Buer Method................................................................................................................... 268
Sample DCB Conguration...........................................................................................................................................269
PFC and ETS Conguration Command Examples................................................................................................271
12 Dynamic Host Conguration Protocol (DHCP)......................................................................................... 272
DHCP Packet Format and Options..............................................................................................................................272
Assign an IP Address using DHCP............................................................................................................................... 274
Implementation Information..........................................................................................................................................275
Congure the System to be a DHCP Server..............................................................................................................275
Conguring the Server for Automatic Address Allocation..................................................................................276
Specifying a Default Gateway.................................................................................................................................277
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