Concept Guide

View CAM Usage...........................................................................................................................................................256
Conguring CAM Threshold and Silence Period........................................................................................................257
Setting CAM Threshold and Silence Period..........................................................................................................257
CAM Optimization......................................................................................................................................................... 258
Troubleshoot CAM Proling..........................................................................................................................................258
QoS CAM Region Limitation...................................................................................................................................258
Syslog Error When the Table is Full....................................................................................................................... 258
Syslog Warning Upon 90 Percent Utilization of CAM.........................................................................................259
Syslog Warning for Discrepancies Between Congured Extended Prexes....................................................259
Unied Forwarding Table (UFT) Modes..................................................................................................................... 259
Conguring UFT Modes......................................................................................................................................... 259
IPv6 CAM ACL Region..................................................................................................................................................260
Important Points to Remember............................................................................................................................. 260
Convert the IPv6 ACL CAM to Double-Wide.......................................................................................................260
Sharing CAM space between IPv4 QoS and IPv6 ACLs.....................................................................................261
11 Control Plane Policing (CoPP).................................................................................................................. 262
Congure Control Plane Policing................................................................................................................................. 263
Conguring CoPP for Protocols............................................................................................................................ 264
Conguring CoPP for CPU Queues...................................................................................................................... 266
Protocol to CPU Queue Mapping.......................................................................................................................... 267
Conguring Protocol to CPU Queue Mapping.....................................................................................................267
Displaying CoPP Conguration ............................................................................................................................. 268
12 Data Center Bridging (DCB)..................................................................................................................... 270
Ethernet Enhancements in Data Center Bridging......................................................................................................270
Priority-Based Flow Control.................................................................................................................................... 271
Enhanced Transmission Selection..........................................................................................................................272
Data Center Bridging Exchange Protocol (DCBx)...............................................................................................273
Data Center Bridging in a Trac Flow...................................................................................................................274
Enabling Data Center Bridging......................................................................................................................................274
DCB Maps and its Attributes..................................................................................................................................275
Data Center Bridging: Default Conguration..............................................................................................................275
Conguring Priority-Based Flow Control.................................................................................................................... 276
Conguring Lossless Queues..................................................................................................................................277
Conguring PFC in a DCB Map....................................................................................................................................278
PFC Conguration Notes........................................................................................................................................278
PFC Prerequisites and Restrictions....................................................................................................................... 279
Applying a DCB Map on a Port.................................................................................................................................... 279
Conguring PFC without a DCB Map.........................................................................................................................280
Conguring PFC Asymmetric.......................................................................................................................................280
Priority-Based Flow Control Using Dynamic Buer Method.................................................................................... 281
Pause and Resume of Trac...................................................................................................................................281
Buer Sizes for Lossless or PFC Packets............................................................................................................. 281
Shared headroom for lossless or PFC packets.......................................................................................................... 282
Example Scenario.................................................................................................................................................... 282
Contents
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