Concept Guide

Overview of Layer Modes...................................................................................................................................... 358
Conguring Layer 2 (Data Link) Mode..................................................................................................................358
Conguring Layer 2 (Interface) Mode.................................................................................................................. 359
Conguring Layer 3 (Network) Mode...................................................................................................................359
Conguring Layer 3 (Interface) Mode.................................................................................................................. 360
Automatic recovery of an Err-disabled interface.......................................................................................................360
Conguring an automatic recovery for an Err-disabled interface...................................................................... 361
Egress Interface Selection (EIS)...................................................................................................................................361
Important Points to Remember............................................................................................................................. 362
Conguring EIS........................................................................................................................................................ 362
Management Interfaces................................................................................................................................................362
Conguring Management Interfaces.....................................................................................................................362
Conguring a Management Interface on an Ethernet Port................................................................................364
VLAN Interfaces............................................................................................................................................................ 364
Loopback Interfaces......................................................................................................................................................365
Null Interfaces................................................................................................................................................................ 365
Port Channel Interfaces................................................................................................................................................366
Port Channel Denition and Standards.................................................................................................................366
Port Channel Benets.............................................................................................................................................366
Port Channel Implementation.................................................................................................................................366
Interfaces in Port Channels.................................................................................................................................... 367
Conguration Tasks for Port Channel Interfaces.................................................................................................367
Creating a Port Channel..........................................................................................................................................367
Adding a Physical Interface to a Port Channel.....................................................................................................368
Reassigning an Interface to a New Port Channel................................................................................................369
Conguring the Minimum Oper Up Links in a Port Channel...............................................................................370
Adding or Removing a Port Channel from a VLAN..............................................................................................370
Assigning an IP Address to a Port Channel...........................................................................................................372
Deleting or Disabling a Port Channel..................................................................................................................... 372
Load Balancing Through Port Channels................................................................................................................372
Load-Balancing Method..........................................................................................................................................372
Changing the Hash Algorithm................................................................................................................................ 373
Bulk Conguration..........................................................................................................................................................374
Interface Range........................................................................................................................................................374
Bulk Conguration Examples..................................................................................................................................375
Dening Interface Range Macros................................................................................................................................ 376
Dene the Interface Range.....................................................................................................................................376
Choosing an Interface-Range Macro.................................................................................................................... 376
Monitoring and Maintaining Interfaces........................................................................................................................377
Maintenance Using TDR......................................................................................................................................... 378
Link Dampening..............................................................................................................................................................378
Important Points to Remember..............................................................................................................................379
Conguration Example of Link Dampening...........................................................................................................379
Enabling Link Dampening.........................................................................................................................................381
Link Bundle Monitoring................................................................................................................................................. 382
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Contents