Administrator Guide
DCB Configuration Exchange....................................................................................................................................250
Configuration Source Election...................................................................................................................................250
Propagation of DCB Information...............................................................................................................................250
Auto-Detection and Manual Configuration of the DCBx Version..........................................................................251
Behavior of Tagged Packets...................................................................................................................................... 251
Configuration Example for DSCP and PFC Priorities.............................................................................................. 251
DCBx Example............................................................................................................................................................. 252
DCBx Prerequisites and Restrictions........................................................................................................................253
Configuring DCBx........................................................................................................................................................253
Verifying the DCB Configuration.....................................................................................................................................256
Performing PFC Using DSCP Bits Instead of 802.1p Bits........................................................................................... 265
PFC and ETS Configuration Examples...........................................................................................................................266
Using PFC and ETS to Manage Data Center Traffic................................................................................................... 266
Using PFC and ETS to Manage Converged Ethernet Traffic............................................................................... 268
Hierarchical Scheduling in ETS Output Policies.......................................................................................................268
Priority-Based Flow Control Using Dynamic Buffer Method.......................................................................................269
Configuring the Dynamic Buffer Method.......................................................................................................................270
12 Debugging and Diagnostics....................................................................................................... 271
Offline Diagnostics............................................................................................................................................................. 271
Running Port Extender Offline Diagnostics on the Switch.....................................................................................271
Running Offline Diagnostics on a Standalone Switch............................................................................................. 277
TRACE Logs.......................................................................................................................................................................297
Auto Save on Reload, Crash, or Rollover..................................................................................................................297
Uploading Trace Logs................................................................................................................................................. 297
Last Restart Reason..........................................................................................................................................................297
show hardware Commands............................................................................................................................................. 298
Environmental Monitoring................................................................................................................................................299
Displaying Port Extender Environment Information .............................................................................................. 300
Display Power Supply Status.....................................................................................................................................300
Display Fan Status........................................................................................................................................................301
Display Transceiver Type............................................................................................................................................ 301
Recognize an Over-Temperature Condition............................................................................................................303
Troubleshoot an Over-Temperature Condition....................................................................................................... 303
Troubleshooting Packet Loss.......................................................................................................................................... 305
Displaying Drop Counters...........................................................................................................................................306
Displaying Dataplane Statistics.................................................................................................................................. 307
Displaying Line-Card Counters.................................................................................................................................. 308
Accessing Application Core Dumps................................................................................................................................ 309
Mini Core Dumps...............................................................................................................................................................309
Full Kernel Core Dumps.....................................................................................................................................................310
Enabling TCP Dumps.........................................................................................................................................................310
Accessing Port Extender Core and Mini Core Dumps................................................................................................... 311
13 Dynamic Host Configuration Protocol (DHCP)........................................................................... 312
DHCP Packet Format and Options..................................................................................................................................312
Assign an IP Address using DHCP................................................................................................................................... 313
Implementation Information..............................................................................................................................................314
Configure the System to be a DHCP Server................................................................................................................. 315
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