Administrator Guide

Configure Control Plane Policing.......................................................................................270
Configuring CoPP for Protocols................................................................................... 270
Configuring CoPP for CPU Queues............................................................................. 272
Show Commands.............................................................................................................273
14 Data Center Bridging (DCB)..............................................................................................275
Supported Modes...................................................................................................................275
Ethernet Enhancements in Data Center Bridging........................................................... 275
Priority-Based Flow Control................................................................................................ 276
Enhanced Transmission Selection......................................................................................278
Data Center Bridging Exchange Protocol (DCBx)...........................................................279
Creating a DCB Map..............................................................................................................280
Important Points to Remember....................................................................................280
Applying a DCB Map on Server-Facing Ethernet Ports............................................ 281
Data Center Bridging: Default Configuration...................................................................281
Data Center Bridging in a Traffic Flow.............................................................................. 282
Data Center Bridging: Auto-DCB-Enable Mode............................................................. 282
Configuring Priority-Based Flow Control.........................................................................284
How Priority-Based Flow Control is Implemented...................................................286
Configuring Lossless Queues........................................................................................ 287
Configuring the PFC Buffer in a Switch Stack............................................................288
Configuring Enhanced Transmission Selection.............................................................. 289
How Enhanced Transmission Selection is Implemented........................................290
ETS Operation with DCBx...............................................................................................291
Hierarchical Scheduling in ETS Output Policies.............................................................. 291
DCBx Operation..................................................................................................................... 292
DCBx Operation............................................................................................................... 292
DCBx Port Roles............................................................................................................... 293
DCB Configuration Exchange....................................................................................... 294
Configuration Source Election......................................................................................295
Propagation of DCB Information..................................................................................295
Auto-Detection of the DCBx Version..........................................................................296
DCBx Example.................................................................................................................. 296
DCBx Prerequisites and Restrictions............................................................................297
DCBx Error Messages......................................................................................................298
Debugging DCBx on an Interface................................................................................ 298
Verifying the DCB Configuration........................................................................................299
QoS dot1p Traffic Classification and Queue Assignment............................................. 309
Troubleshooting PFC, ETS, and DCBx Operation........................................................... 310
15 Dynamic Host Configuration Protocol (DHCP)............................................................ 312
Supported Modes................................................................................................................... 312
Configuration Guide
10