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Enabling a Physical Interface........................................................................................................................................329
Physical Interfaces.........................................................................................................................................................329
Conguration Task List for Physical Interfaces....................................................................................................330
Overview of Layer Modes...................................................................................................................................... 330
Conguring Layer 2 (Data Link) Mode..................................................................................................................330
Conguring Layer 2 (Interface) Mode................................................................................................................... 331
Conguring Layer 3 (Network) Mode....................................................................................................................331
Conguring Layer 3 (Interface) Mode...................................................................................................................332
Egress Interface Selection (EIS)..................................................................................................................................332
Important Points to Remember..............................................................................................................................332
Conguring EIS........................................................................................................................................................ 333
Management Interfaces................................................................................................................................................333
Conguring Management Interfaces.....................................................................................................................333
Conguring a Management Interface on an Ethernet Port............................................................................... 335
VLAN Interfaces............................................................................................................................................................ 335
Loopback Interfaces......................................................................................................................................................336
Null Interfaces................................................................................................................................................................ 336
Port Channel Interfaces................................................................................................................................................336
Port Channel Denition and Standards................................................................................................................. 337
Port Channel Benets............................................................................................................................................. 337
Port Channel Implementation.................................................................................................................................337
Interfaces in Port Channels.................................................................................................................................... 338
Conguration Tasks for Port Channel Interfaces.................................................................................................338
Creating a Port Channel..........................................................................................................................................338
Adding a Physical Interface to a Port Channel.....................................................................................................339
Reassigning an Interface to a New Port Channel................................................................................................340
Conguring the Minimum Oper Up Links in a Port Channel............................................................................... 341
Adding or Removing a Port Channel from a VLAN.............................................................................................. 341
Assigning an IP Address to a Port Channel.......................................................................................................... 342
Deleting or Disabling a Port Channel..................................................................................................................... 343
Load Balancing Through Port Channels................................................................................................................343
Load-Balancing Method..........................................................................................................................................343
Changing the Hash Algorithm................................................................................................................................ 344
Bulk Conguration......................................................................................................................................................... 345
Interface Range........................................................................................................................................................345
Bulk Conguration Examples..................................................................................................................................345
Dening Interface Range Macros................................................................................................................................ 347
Dene the Interface Range.....................................................................................................................................347
Choosing an Interface-Range Macro.................................................................................................................... 347
Monitoring and Maintaining Interfaces........................................................................................................................348
Maintenance Using TDR......................................................................................................................................... 349
Link Dampening..............................................................................................................................................................349
Important Points to Remember............................................................................................................................. 350
Conguration Example of Link Dampening.......................................................................................................... 350
Enabling Link Dampening........................................................................................................................................352
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