Concept Guide

28 Layer 2.....................................................................................................................................................543
Manage the MAC Address Table................................................................................................................................. 543
Clearing the MAC Address Table........................................................................................................................... 543
Setting the Aging Time for Dynamic Entries........................................................................................................543
Conguring a Static MAC Address........................................................................................................................544
Displaying the MAC Address Table........................................................................................................................ 544
MAC Learning Limit.......................................................................................................................................................544
Setting the MAC Learning Limit............................................................................................................................ 545
mac learning-limit Dynamic.................................................................................................................................... 545
mac learning-limit mac-address-sticky................................................................................................................. 545
mac learning-limit station-move............................................................................................................................ 546
mac learning-limit no-station-move...................................................................................................................... 546
Learning Limit Violation Actions.............................................................................................................................546
Setting Station Move Violation Actions................................................................................................................ 547
Recovering from Learning Limit and Station Move Violations........................................................................... 547
Enabling port security............................................................................................................................................. 548
NIC Teaming................................................................................................................................................................... 548
Congure Redundant Pairs.......................................................................................................................................... 549
Important Points about Conguring Redundant Pairs.........................................................................................551
Far-End Failure Detection.............................................................................................................................................552
FEFD State Changes...............................................................................................................................................553
Conguring FEFD.................................................................................................................................................... 554
Enabling FEFD on an Interface.............................................................................................................................. 554
Debugging FEFD......................................................................................................................................................555
29 Link Layer Discovery Protocol (LLDP)..................................................................................................... 557
802.1AB (LLDP) Overview............................................................................................................................................557
Protocol Data Units................................................................................................................................................. 557
Optional TLVs.................................................................................................................................................................558
Management TLVs.................................................................................................................................................. 558
TIA-1057 (LLDP-MED) Overview................................................................................................................................ 560
TIA Organizationally Specic TLVs........................................................................................................................560
Congure LLDP............................................................................................................................................................. 564
Related Conguration Tasks...................................................................................................................................564
Important Points to Remember............................................................................................................................. 564
LLDP Compatibility..................................................................................................................................................565
CONFIGURATION versus INTERFACE Congurations............................................................................................565
Enabling LLDP................................................................................................................................................................565
Disabling and Undoing LLDP..................................................................................................................................566
Enabling LLDP on Management Ports........................................................................................................................566
Disabling and Undoing LLDP on Management Ports..........................................................................................566
Advertising TLVs............................................................................................................................................................566
Storing and Viewing Unrecognized LLDP TLVs.........................................................................................................568
Reserved Unrecognized LLDP TLVs..................................................................................................................... 568
Organizational Specic Unrecognized LLDP TLVs..............................................................................................568
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