Configuration Example for DSCP and PFC Priorities................................................................264
DCBx Example.............................................................................................................................265
DCBx Prerequisites and Restrictions..........................................................................................265
Configuring DCBx.......................................................................................................................266
Verifying the DCB Configuration......................................................................................................270
Generation of PFC for a Priority for Untagged Packets...................................................................281
Operations on Untagged Packets....................................................................................................281
Performing PFC Using DSCP Bits Instead of 802.1p Bits.................................................................281
PFC and ETS Configuration Examples.............................................................................................282
Using PFC and ETS to Manage Data Center Traffic........................................................................282
PFC and ETS Configuration Command Examples....................................................................284
Using PFC and ETS to Manage Converged Ethernet Traffic.....................................................284
Hierarchical Scheduling in ETS Output Policies........................................................................284
Priority-Based Flow Control Using Dynamic Buffer Method..........................................................285
Pause and Resume of Traffic......................................................................................................285
Buffer Sizes for Lossless or PFC Packets...................................................................................286
Configuring the Dynamic Buffer Method........................................................................................286
Sample Configurations.....................................................................................................................289
.....................................................................................................................................................289
13 Debugging and Diagnostics.........................................................................293
Offline Diagnostics...........................................................................................................................293
Important Points to Remember.................................................................................................293
Running Offline Diagnostics.......................................................................................................293
Examples of Running Offline Diagnostics..................................................................................295
TRACE Logs.......................................................................................................................................302
Auto Save on Reload, Crash, or Rollover...................................................................................303
Last Restart Reason...........................................................................................................................303
Line Card Restart Causes and Reasons......................................................................................303
show hardware Commands.............................................................................................................303
Environmental Monitoring................................................................................................................305
Display Power Supply Status......................................................................................................305
Display Fan Status.......................................................................................................................306
Display Transceiver Type............................................................................................................306
Recognize an Over-Temperature Condition............................................................................308
Troubleshoot an Over-Temperature Condition........................................................................309
Troubleshooting Packet Loss............................................................................................................311
Displaying Drop Counters...........................................................................................................311
Displaying Dataplane Statistics...................................................................................................313
Displaying Line-Card Counters..................................................................................................314
Accessing Application Core Dumps.................................................................................................315
Mini Core Dumps..............................................................................................................................316