Concept Guide

26 Link Aggregation Control Protocol (LACP).............................................................................................. 526
Introduction to Dynamic LAGs and LACP.................................................................................................................. 526
Important Points to Remember............................................................................................................................. 526
LACP Modes............................................................................................................................................................ 527
Conguring LACP Commands............................................................................................................................... 527
LACP Conguration Tasks............................................................................................................................................ 528
Creating a LAG.........................................................................................................................................................528
Conguring the LAG Interfaces as Dynamic........................................................................................................ 528
Setting the LACP Long Timeout........................................................................................................................... 529
Monitoring and Debugging LACP..........................................................................................................................529
Shared LAG State Tracking.......................................................................................................................................... 530
Conguring Shared LAG State Tracking...............................................................................................................530
Important Points about Shared LAG State Tracking........................................................................................... 532
LACP Basic Conguration Example............................................................................................................................ 532
Congure a LAG on ALPHA................................................................................................................................... 532
27 Layer 2..................................................................................................................................................... 541
Manage the MAC Address Table..................................................................................................................................541
Clearing the MAC Address Table............................................................................................................................541
Setting the Aging Time for Dynamic Entries.........................................................................................................541
Conguring a Static MAC Address........................................................................................................................542
Displaying the MAC Address Table........................................................................................................................ 542
MAC Learning Limit.......................................................................................................................................................542
Setting the MAC Learning Limit............................................................................................................................ 543
mac learning-limit Dynamic.....................................................................................................................................543
mac learning-limit mac-address-sticky................................................................................................................. 543
mac learning-limit station-move............................................................................................................................ 544
mac learning-limit no-station-move...................................................................................................................... 544
Learning Limit Violation Actions.............................................................................................................................544
Setting Station Move Violation Actions................................................................................................................ 545
Recovering from Learning Limit and Station Move Violations...........................................................................545
Disabling MAC Address Learning on the System................................................................................................ 546
Enabling port security............................................................................................................................................. 546
NIC Teaming................................................................................................................................................................... 546
Congure Redundant Pairs...........................................................................................................................................547
Important Points about Conguring Redundant Pairs........................................................................................ 549
Far-End Failure Detection.............................................................................................................................................550
FEFD State Changes............................................................................................................................................... 551
Conguring FEFD.................................................................................................................................................... 552
Enabling FEFD on an Interface.............................................................................................................................. 552
Debugging FEFD......................................................................................................................................................553
28 Link Layer Discovery Protocol (LLDP)..................................................................................................... 555
802.1AB (LLDP) Overview........................................................................................................................................... 555
Protocol Data Units.................................................................................................................................................555
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Contents