Configuring CoPP for OSPFv3.............................................................................................................................. 249Displaying CoPP Configuration ............................................................................................................................. 24912 Data Center Bridging (DCB)..................................................................................................................... 252Ethernet Enhancements in Data Center Bridging..................................................................................................... 252Priority-Based Flow Control................................................................................................................................... 253Enhanced Transmission Selection..........................................................................................................................254Data Center Bridging Exchange Protocol (DCBx)...............................................................................................255Data Center Bridging in a Traffic Flow.................................................................................................................. 256Enabling Data Center Bridging.....................................................................................................................................256DCB Maps and its Attributes..................................................................................................................................257Data Center Bridging: Default Configuration..............................................................................................................258Configuring Priority-Based Flow Control....................................................................................................................258Configuring Lossless Queues................................................................................................................................. 259Configuring PFC in a DCB Map................................................................................................................................... 260PFC Configuration Notes....................................................................................................................................... 260PFC Prerequisites and Restrictions........................................................................................................................261Applying a DCB Map on a Port..................................................................................................................................... 261Configuring PFC without a DCB Map.........................................................................................................................262Configuring Lossless QueuesExample:..................................................................................................................262Priority-Based Flow Control Using Dynamic Buffer Method....................................................................................264Pause and Resume of Traffic..................................................................................................................................264Buffer Sizes for Lossless or PFC Packets............................................................................................................ 264Behavior of Tagged Packets.........................................................................................................................................265Configuration Example for DSCP and PFC Priorities................................................................................................265Using PFC to Manage Converged Ethernet Traffic.................................................................................................. 266Configure Enhanced Transmission Selection..............................................................................................................266ETS Prerequisites and Restrictions....................................................................................................................... 266Creating an ETS Priority Group............................................................................................................................. 266ETS Operation with DCBx...................................................................................................................................... 268Configuring Bandwidth Allocation for DCBx CIN................................................................................................ 268Configuring ETS in a DCB Map..............................................................................................................................269Hierarchical Scheduling in ETS Output Policies......................................................................................................... 270Using ETS to Manage Converged Ethernet Traffic....................................................................................................271Applying DCB Policies in a Switch Stack..................................................................................................................... 271Configure a DCBx Operation.........................................................................................................................................271DCBx Operation........................................................................................................................................................ 271DCBx Port Roles...................................................................................................................................................... 272DCB Configuration Exchange.................................................................................................................................273Configuration Source Election................................................................................................................................273Propagation of DCB Information............................................................................................................................ 274Auto-Detection and Manual Configuration of the DCBx Version.......................................................................274DCBx Example..........................................................................................................................................................275DCBx Prerequisites and Restrictions.....................................................................................................................275Configuring DCBx.................................................................................................................................................... 275Verifying the DCB Configuration..................................................................................................................................279Contents 9
