Users Guide

Conguration Source Election.................................................................................................................................271
Propagation of DCB Information............................................................................................................................272
Auto-Detection and Manual Conguration of the DCBx Version.......................................................................272
Behavior of Tagged Packets................................................................................................................................... 273
Conguration Example for DSCP and PFC Priorities.......................................................................................... 273
DCBx Example..........................................................................................................................................................274
DCBx Prerequisites and Restrictions.....................................................................................................................275
Conguring DCBx.................................................................................................................................................... 275
Verifying the DCB Conguration..................................................................................................................................278
Performing PFC Using DSCP Bits Instead of 802.1p Bits.........................................................................................288
PFC and ETS Conguration Examples........................................................................................................................288
Using PFC and ETS to Manage Data Center Trac................................................................................................. 289
PFC and ETS Conguration Command Examples.............................................................................................. 290
Using PFC and ETS to Manage Converged Ethernet Trac.............................................................................290
Hierarchical Scheduling in ETS Output Policies....................................................................................................291
Priority-Based Flow Control Using Dynamic Buer Method.................................................................................... 291
Pause and Resume of Trac.................................................................................................................................. 291
Buer Sizes for Lossless or PFC Packets............................................................................................................ 292
Conguring the Dynamic Buer Method................................................................................................................... 292
12 Debugging and Diagnostics...................................................................................................................... 294
Oine Diagnostics.........................................................................................................................................................294
Running Port Extender Oine Diagnostics on the Switch.................................................................................294
Running Oine Diagnostics on a Standalone Switch.......................................................................................... 301
TRACE Logs....................................................................................................................................................................321
Auto Save on Reload, Crash, or Rollover.............................................................................................................. 322
Uploading Trace Logs.............................................................................................................................................. 322
Last Restart Reason......................................................................................................................................................322
show hardware Commands.......................................................................................................................................... 323
Environmental Monitoring.............................................................................................................................................325
Displaying Port Extender Environment Information ........................................................................................... 325
Display Power Supply Status..................................................................................................................................325
Display Fan Status................................................................................................................................................... 326
Display Transceiver Type......................................................................................................................................... 326
Recognize an Over-Temperature Condition..........................................................................................................328
Troubleshoot an Over-Temperature Condition..................................................................................................... 329
Troubleshooting Packet Loss........................................................................................................................................ 331
Displaying Drop Counters........................................................................................................................................ 331
Displaying Dataplane Statistics...............................................................................................................................332
Displaying Line-Card Counters...............................................................................................................................334
Accessing Application Core Dumps.............................................................................................................................334
Mini Core Dumps........................................................................................................................................................... 335
Full Kernel Core Dumps.................................................................................................................................................336
Enabling TCP Dumps.....................................................................................................................................................336
Accessing Port Extender Core and Mini Core Dumps...............................................................................................337
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