Concept Guide

Priority-Based Flow Control Using Dynamic Buer Method....................................................................................268
Pause and Resume of Trac..................................................................................................................................268
Buer Sizes for Lossless or PFC Packets............................................................................................................ 268
Behavior of Tagged Packets.........................................................................................................................................269
Conguration Example for DSCP and PFC Priorities................................................................................................269
SNMP Support for PFC and Buer Statistics Tracking............................................................................................270
Performing PFC Using DSCP Bits Instead of 802.1p Bits..........................................................................................271
PFC and ETS Conguration Examples........................................................................................................................272
Using PFC to Manage Converged Ethernet Trac...................................................................................................272
Operations on Untagged Packets................................................................................................................................ 272
Generation of PFC for a Priority for Untagged Packets........................................................................................... 273
Congure Enhanced Transmission Selection..............................................................................................................273
ETS Prerequisites and Restrictions........................................................................................................................273
Creating an ETS Priority Group..............................................................................................................................273
ETS Operation with DCBx.......................................................................................................................................274
Conguring Bandwidth Allocation for DCBx CIN.................................................................................................275
Conguring ETS in a DCB Map..............................................................................................................................276
Hierarchical Scheduling in ETS Output Policies..........................................................................................................277
Using ETS to Manage Converged Ethernet Trac................................................................................................... 277
Applying DCB Policies in a Switch Stack.................................................................................................................... 278
Congure a DCBx Operation........................................................................................................................................ 278
DCBx Operation....................................................................................................................................................... 278
DCBx Port Roles...................................................................................................................................................... 278
DCB Conguration Exchange................................................................................................................................ 280
Conguration Source Election............................................................................................................................... 280
Propagation of DCB Information............................................................................................................................ 281
Auto-Detection and Manual Conguration of the DCBx Version....................................................................... 281
DCBx Example.......................................................................................................................................................... 281
DCBx Prerequisites and Restrictions.....................................................................................................................282
Conguring DCBx.................................................................................................................................................... 282
Verifying the DCB Conguration................................................................................................................................. 286
QoS dot1p Trac Classication and Queue Assignment..........................................................................................294
Conguring the Dynamic Buer Method................................................................................................................... 295
Sample DCB Conguration...........................................................................................................................................296
PFC and ETS Conguration Command Examples...............................................................................................297
12 Dynamic Host Conguration Protocol (DHCP).........................................................................................298
DHCP Packet Format and Options............................................................................................................................. 298
Assign an IP Address using DHCP...............................................................................................................................300
Implementation Information.......................................................................................................................................... 301
Congure the System to be a DHCP Server.............................................................................................................. 301
Conguring the Server for Automatic Address Allocation..................................................................................302
Specifying a Default Gateway................................................................................................................................ 303
Congure a Method of Hostname Resolution..................................................................................................... 304
Using DNS for Address Resolution........................................................................................................................304
Using NetBIOS WINS for Address Resolution..................................................................................................... 304
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