Concept Guide

Conguring a Tunnel Interface................................................................................................................................... 1009
Conguring Tunnel Allow-Remote Decapsulation....................................................................................................1009
Conguring Tunnel source anylocal Decapsulation...................................................................................................1010
Guidelines for Conguring Multipoint Receive-Only Tunnels.................................................................................. 1010
Multipoint Receive-Only Tunnels................................................................................................................................ 1010
55 Uplink Failure Detection (UFD)................................................................................................................ 1011
Feature Description....................................................................................................................................................... 1011
How Uplink Failure Detection Works.......................................................................................................................... 1012
UFD and NIC Teaming.................................................................................................................................................. 1013
Important Points to Remember...................................................................................................................................1013
Conguring Uplink Failure Detection.......................................................................................................................... 1014
Clearing a UFD-Disabled Interface............................................................................................................................. 1015
Displaying Uplink Failure Detection............................................................................................................................. 1016
Sample Conguration: Uplink Failure Detection........................................................................................................1018
56 Upgrade Procedures...............................................................................................................................1020
Get Help with Upgrades..............................................................................................................................................1020
57 Virtual LANs (VLANs)............................................................................................................................. 1021
Default VLAN................................................................................................................................................................1022
Port-Based VLANs.......................................................................................................................................................1022
VLANs and Port Tagging............................................................................................................................................. 1023
Conguration Task List................................................................................................................................................ 1023
Creating a Port-Based VLAN................................................................................................................................1023
Assigning Interfaces to a VLAN............................................................................................................................1024
Moving Untagged Interfaces................................................................................................................................ 1025
Assigning an IP Address to a VLAN..................................................................................................................... 1026
Conguring Native VLANs..........................................................................................................................................1026
Enabling Null VLAN as the Default VLAN................................................................................................................. 1027
58 Virtual Link Trunking (VLT).....................................................................................................................1028
Overview....................................................................................................................................................................... 1028
VLT Terminology......................................................................................................................................................1031
Layer-2 Trac in VLT Domains............................................................................................................................. 1032
Interspersed VLANs...............................................................................................................................................1033
VLT on Core Switches........................................................................................................................................... 1033
Enhanced VLT.........................................................................................................................................................1034
Congure Virtual Link Trunking.................................................................................................................................. 1035
Important Points to Remember............................................................................................................................1035
Conguration Notes...............................................................................................................................................1036
Primary and Secondary VLT Peers...................................................................................................................... 1039
RSTP and VLT........................................................................................................................................................ 1040
VLT Bandwidth Monitoring...................................................................................................................................1040
VLT and Stacking................................................................................................................................................... 1040
VLT and IGMP Snooping.......................................................................................................................................1040
Contents
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