Administrator Guide

DCB Configuration Exchange................................................................................................................................. 261
Configuration Source Election................................................................................................................................261
Propagation of DCB Information...........................................................................................................................262
Auto-Detection and Manual Configuration of the DCBx Version..................................................................262
Behavior of Tagged Packets.................................................................................................................................. 263
Configuration Example for DSCP and PFC Priorities.......................................................................................263
DCBx Example............................................................................................................................................................264
DCBx Prerequisites and Restrictions................................................................................................................... 264
Configuring DCBx..................................................................................................................................................... 265
Verifying the DCB Configuration.................................................................................................................................268
Performing PFC Using DSCP Bits Instead of 802.1p Bits..................................................................................... 277
PFC and ETS Configuration Examples.......................................................................................................................278
Using PFC and ETS to Manage Data Center Traffic..............................................................................................278
Using PFC and ETS to Manage Converged Ethernet Traffic.........................................................................279
Hierarchical Scheduling in ETS Output Policies.................................................................................................280
Priority-Based Flow Control Using Dynamic Buffer Method............................................................................... 280
Configuring the Dynamic Buffer Method...................................................................................................................281
Chapter 12: Debugging and Diagnostics..................................................................................... 283
Offline Diagnostics..........................................................................................................................................................283
Running Port Extender Offline Diagnostics on the Switch.............................................................................283
Running Offline Diagnostics on a Standalone Switch...................................................................................... 289
TRACE Logs..................................................................................................................................................................... 309
Auto Save on Reload, Crash, or Rollover............................................................................................................ 309
Uploading Trace Logs.............................................................................................................................................. 309
Last Restart Reason....................................................................................................................................................... 310
show hardware Commands........................................................................................................................................... 310
Environmental Monitoring..............................................................................................................................................312
Displaying Port Extender Environment Information ......................................................................................... 313
Display Power Supply Status.................................................................................................................................. 313
Display Fan Status..................................................................................................................................................... 314
Display Transceiver Type......................................................................................................................................... 314
Recognize an Over-Temperature Condition........................................................................................................316
Troubleshoot an Over-Temperature Condition.................................................................................................. 316
Troubleshooting Packet Loss........................................................................................................................................318
Displaying Drop Counters.........................................................................................................................................319
Displaying Dataplane Statistics..............................................................................................................................320
Displaying Line-Card Counters............................................................................................................................... 321
Accessing Application Core Dumps............................................................................................................................ 322
Mini Core Dumps.............................................................................................................................................................323
Full Kernel Core Dumps................................................................................................................................................. 323
Enabling TCP Dumps......................................................................................................................................................324
Accessing Port Extender Core and Mini Core Dumps........................................................................................... 324
Chapter 13: Dynamic Host Configuration Protocol (DHCP)........................................................ 325
DHCP Packet Format and Options.............................................................................................................................325
Assign an IP Address using DHCP.............................................................................................................................. 326
Implementation Information..........................................................................................................................................327
Configure the System to be a DHCP Server............................................................................................................328
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