Concept Guide

Setting the Timezone..............................................................................................................................................992
Set Daylight Saving Time........................................................................................................................................992
Setting Daylight Saving Time Once.......................................................................................................................992
Setting Recurring Daylight Saving Time............................................................................................................... 993
55 Tunneling.................................................................................................................................................995
Conguring a Tunnel..................................................................................................................................................... 995
Conguring Tunnel Keepalive Settings........................................................................................................................996
Conguring a Tunnel Interface..................................................................................................................................... 997
Conguring Tunnel Allow-Remote Decapsulation......................................................................................................997
Conguring Tunnel source anylocal Decapsulation....................................................................................................998
Guidelines for Conguring Multipoint Receive-Only Tunnels................................................................................... 998
Multipoint Receive-Only Tunnels................................................................................................................................. 998
56 Uplink Failure Detection (UFD)................................................................................................................ 999
Feature Description....................................................................................................................................................... 999
How Uplink Failure Detection Works......................................................................................................................... 1000
UFD and NIC Teaming..................................................................................................................................................1001
Important Points to Remember...................................................................................................................................1001
Conguring Uplink Failure Detection......................................................................................................................... 1002
Clearing a UFD-Disabled Interface.............................................................................................................................1003
Displaying Uplink Failure Detection............................................................................................................................ 1004
Sample Conguration: Uplink Failure Detection....................................................................................................... 1006
57 Upgrade Procedures...............................................................................................................................1008
Get Help with Upgrades..............................................................................................................................................1008
58 Virtual LANs (VLANs)............................................................................................................................ 1009
Default VLAN................................................................................................................................................................ 1010
Port-Based VLANs....................................................................................................................................................... 1010
VLANs and Port Tagging.............................................................................................................................................. 1011
Conguration Task List..................................................................................................................................................1011
Creating a Port-Based VLAN................................................................................................................................. 1011
Assigning Interfaces to a VLAN............................................................................................................................ 1012
Moving Untagged Interfaces.................................................................................................................................1013
Assigning an IP Address to a VLAN......................................................................................................................1014
Conguring Native VLANs...........................................................................................................................................1014
Enabling Null VLAN as the Default VLAN..................................................................................................................1015
59 Virtual Link Trunking (VLT)..................................................................................................................... 1016
Overview........................................................................................................................................................................1016
VLT Terminology......................................................................................................................................................1019
Layer-2 Trac in VLT Domains............................................................................................................................. 1020
Interspersed VLANs................................................................................................................................................1021
VLT on Core Switches............................................................................................................................................1021
Enhanced VLT.........................................................................................................................................................1022
Contents
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