White Papers

Table Of Contents
Propagation of DCB Information...........................................................................................................................249
Auto-Detection and Manual Configuration of the DCBx Version..................................................................249
DCBx Example............................................................................................................................................................249
DCBx Prerequisites and Restrictions................................................................................................................... 250
Configuring DCBx..................................................................................................................................................... 250
Verifying the DCB Configuration.................................................................................................................................253
QoS dot1p Traffic Classification and Queue Assignment......................................................................................259
Configuring the Dynamic Buffer Method..................................................................................................................260
Sample DCB Configuration............................................................................................................................................261
Chapter 13: Debugging and Diagnostics..................................................................................... 264
Offline Diagnostics..........................................................................................................................................................264
Running Offline Diagnostics................................................................................................................................... 264
Examples of Running Offline Diagnostics............................................................................................................272
TRACE Logs..................................................................................................................................................................... 279
Auto Save on Crash or Rollover.............................................................................................................................279
Last Restart Reason.......................................................................................................................................................279
show hardware Commands.......................................................................................................................................... 280
Environmental Monitoring.............................................................................................................................................282
Display Power Supply Status..................................................................................................................................282
Display Fan Status.................................................................................................................................................... 283
Display Transceiver Type........................................................................................................................................ 283
Recognize an Over-Temperature Condition.......................................................................................................285
Troubleshoot an Over-Temperature Condition..................................................................................................286
Troubleshooting Packet Loss.......................................................................................................................................287
Displaying Drop Counters........................................................................................................................................287
Displaying Dataplane Statistics..............................................................................................................................289
Displaying Line Card Counters................................................................................................................................291
Accessing Application Core Dumps............................................................................................................................ 292
Mini Core Dumps.............................................................................................................................................................292
Full Kernel Core Dumps................................................................................................................................................. 293
Enabling TCP Dumps......................................................................................................................................................293
Chapter 14: Dynamic Host Configuration Protocol (DHCP)........................................................ 294
DHCP Packet Format and Options.............................................................................................................................294
Assign an IP Address using DHCP.............................................................................................................................. 295
Implementation Information......................................................................................................................................... 296
Configure the System to be a DHCP Server............................................................................................................297
Configuring the Server for Automatic Address Allocation.............................................................................. 297
Specifying a Default Gateway................................................................................................................................298
Configure a Method of Hostname Resolution....................................................................................................299
Using DNS for Address Resolution....................................................................................................................... 299
Using NetBIOS WINS for Address Resolution................................................................................................... 299
Creating Manual Binding Entries........................................................................................................................... 299
Debugging the DHCP Server................................................................................................................................. 300
Using DHCP Clear Commands...............................................................................................................................300
Configure the System to be a Relay Agent..............................................................................................................300
Configure the System to be a DHCP Client............................................................................................................. 302
DHCP Client on a Management Interface...........................................................................................................302
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