Administrator Guide

Conguration Source Election................................................................................................................................275
Propagation of DCB Information............................................................................................................................276
Auto-Detection and Manual Conguration of the DCBx Version.......................................................................276
Behavior of Tagged Packets................................................................................................................................... 277
Conguration Example for DSCP and PFC Priorities.......................................................................................... 277
DCBx Example..........................................................................................................................................................278
DCBx Prerequisites and Restrictions.....................................................................................................................279
Conguring DCBx.................................................................................................................................................... 279
Verifying the DCB Conguration..................................................................................................................................282
Performing PFC Using DSCP Bits Instead of 802.1p Bits.........................................................................................292
PFC and ETS Conguration Examples........................................................................................................................292
Using PFC and ETS to Manage Data Center Trac................................................................................................. 293
PFC and ETS Conguration Command Examples...............................................................................................294
Using PFC and ETS to Manage Converged Ethernet Trac.............................................................................294
Hierarchical Scheduling in ETS Output Policies...................................................................................................295
Priority-Based Flow Control Using Dynamic Buer Method................................................................................... 295
Pause and Resume of Trac..................................................................................................................................295
Buer Sizes for Lossless or PFC Packets............................................................................................................ 296
Conguring the Dynamic Buer Method................................................................................................................... 296
12 Debugging and Diagnostics...................................................................................................................... 298
Oine Diagnostics.........................................................................................................................................................298
Running Port Extender Oine Diagnostics on the Switch.................................................................................298
Running Oine Diagnostics on a Standalone Switch......................................................................................... 305
TRACE Logs................................................................................................................................................................... 325
Auto Save on Reload, Crash, or Rollover.............................................................................................................. 326
Uploading Trace Logs.............................................................................................................................................. 326
Last Restart Reason......................................................................................................................................................326
show hardware Commands.......................................................................................................................................... 327
Environmental Monitoring.............................................................................................................................................329
Displaying Port Extender Environment Information ........................................................................................... 329
Display Power Supply Status..................................................................................................................................329
Display Fan Status................................................................................................................................................... 330
Display Transceiver Type.........................................................................................................................................330
Recognize an Over-Temperature Condition..........................................................................................................332
Troubleshoot an Over-Temperature Condition..................................................................................................... 333
Troubleshooting Packet Loss........................................................................................................................................335
Displaying Drop Counters........................................................................................................................................335
Displaying Dataplane Statistics.............................................................................................................................. 336
Displaying Line-Card Counters...............................................................................................................................338
Accessing Application Core Dumps.............................................................................................................................338
Mini Core Dumps........................................................................................................................................................... 339
Full Kernel Core Dumps.................................................................................................................................................340
Enabling TCP Dumps.....................................................................................................................................................340
Accessing Port Extender Core and Mini Core Dumps............................................................................................... 341
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