Administrator Guide

Set Daylight Saving Time........................................................................................................................................895
Setting Daylight Saving Time Once.......................................................................................................................895
Setting Recurring Daylight Saving Time............................................................................................................... 896
52 Tunneling................................................................................................................................................. 898
Conguring a Tunnel......................................................................................................................................................898
Conguring Tunnel Keepalive Settings........................................................................................................................899
Conguring a Tunnel Interface.....................................................................................................................................900
Conguring Tunnel Allow-Remote Decapsulation......................................................................................................900
Conguring Tunnel source anylocal Decapsulation.................................................................................................... 901
Guidelines for Conguring Multipoint Receive-Only Tunnels....................................................................................901
Multipoint Receive-Only Tunnels..................................................................................................................................901
53 Uplink Failure Detection (UFD)................................................................................................................ 902
Feature Description....................................................................................................................................................... 902
How Uplink Failure Detection Works...........................................................................................................................903
UFD and NIC Teaming...................................................................................................................................................904
Important Points to Remember................................................................................................................................... 904
Conguring Uplink Failure Detection...........................................................................................................................905
Clearing a UFD-Disabled Interface.............................................................................................................................. 906
Displaying Uplink Failure Detection.............................................................................................................................. 907
Sample Conguration: Uplink Failure Detection.........................................................................................................909
54 Upgrade Procedures.................................................................................................................................910
Get Help with Upgrades................................................................................................................................................910
55 Virtual LANs (VLANs)............................................................................................................................... 911
Default VLAN.................................................................................................................................................................. 912
Port-Based VLANs.........................................................................................................................................................912
VLANs and Port Tagging............................................................................................................................................... 913
Conguration Task List.................................................................................................................................................. 913
Creating a Port-Based VLAN..................................................................................................................................913
Assigning Interfaces to a VLAN..............................................................................................................................914
Moving Untagged Interfaces.................................................................................................................................. 915
Assigning an IP Address to a VLAN....................................................................................................................... 916
Conguring Native VLANs............................................................................................................................................ 916
Enabling Null VLAN as the Default VLAN....................................................................................................................917
56 Virtual Link Trunking (VLT).......................................................................................................................918
Overview......................................................................................................................................................................... 918
VLT Terminology....................................................................................................................................................... 921
Layer-2 Trac in VLT Domains...............................................................................................................................922
Interspersed VLANs.................................................................................................................................................923
VLT on Core Switches.............................................................................................................................................923
Enhanced VLT.......................................................................................................................................................... 924
Congure Virtual Link Trunking.................................................................................................................................... 925
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