Concept Guide

26 Link Aggregation Control Protocol (LACP)............................................................................................... 531
Introduction to Dynamic LAGs and LACP................................................................................................................... 531
Important Points to Remember.............................................................................................................................. 531
LACP Modes............................................................................................................................................................ 532
Conguring LACP Commands...............................................................................................................................532
LACP Conguration Tasks............................................................................................................................................533
Creating a LAG.........................................................................................................................................................533
Conguring the LAG Interfaces as Dynamic........................................................................................................533
Setting the LACP Long Timeout............................................................................................................................534
Monitoring and Debugging LACP..........................................................................................................................534
Shared LAG State Tracking.......................................................................................................................................... 535
Conguring Shared LAG State Tracking...............................................................................................................535
Important Points about Shared LAG State Tracking........................................................................................... 537
LACP Basic Conguration Example.............................................................................................................................537
Congure a LAG on ALPHA................................................................................................................................... 537
27 Layer 2.....................................................................................................................................................546
Manage the MAC Address Table................................................................................................................................. 546
Clearing the MAC Address Table........................................................................................................................... 546
Setting the Aging Time for Dynamic Entries........................................................................................................546
Conguring a Static MAC Address........................................................................................................................547
Displaying the MAC Address Table........................................................................................................................ 547
MAC Learning Limit....................................................................................................................................................... 547
Setting the MAC Learning Limit............................................................................................................................ 548
mac learning-limit Dynamic.................................................................................................................................... 548
mac learning-limit mac-address-sticky................................................................................................................. 548
mac learning-limit station-move............................................................................................................................ 549
mac learning-limit no-station-move...................................................................................................................... 549
Learning Limit Violation Actions.............................................................................................................................549
Setting Station Move Violation Actions................................................................................................................550
Recovering from Learning Limit and Station Move Violations...........................................................................550
Disabling MAC Address Learning on the System................................................................................................. 551
Enabling port security.............................................................................................................................................. 551
NIC Teaming....................................................................................................................................................................551
Congure Redundant Pairs.......................................................................................................................................... 552
Important Points about Conguring Redundant Pairs........................................................................................ 554
Far-End Failure Detection.............................................................................................................................................555
FEFD State Changes...............................................................................................................................................556
Conguring FEFD.................................................................................................................................................... 557
Enabling FEFD on an Interface...............................................................................................................................557
Debugging FEFD......................................................................................................................................................558
28 Link Layer Discovery Protocol (LLDP)..................................................................................................... 560
802.1AB (LLDP) Overview........................................................................................................................................... 560
Protocol Data Units.................................................................................................................................................560
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Contents