Setup Guide

Conguring a Custom-dened Period for NTP time Synchronization.............................................................. 967
57 Tunneling................................................................................................................................................. 968
Conguring a Tunnel......................................................................................................................................................968
Conguring Tunnel Keepalive Settings........................................................................................................................969
Conguring a Tunnel Interface.....................................................................................................................................969
Conguring Tunnel Allow-Remote Decapsulation......................................................................................................970
Conguring the Tunnel Source Anylocal..................................................................................................................... 970
58 Uplink Failure Detection (UFD)................................................................................................................ 972
Feature Description........................................................................................................................................................972
How Uplink Failure Detection Works........................................................................................................................... 973
UFD and NIC Teaming................................................................................................................................................... 974
Important Points to Remember....................................................................................................................................974
Conguring Uplink Failure Detection........................................................................................................................... 975
Clearing a UFD-Disabled Interface...............................................................................................................................976
Displaying Uplink Failure Detection.............................................................................................................................. 977
Sample Conguration: Uplink Failure Detection.........................................................................................................979
59 Upgrade Procedures.................................................................................................................................981
Get Help with Upgrades................................................................................................................................................ 981
60 Virtual LANs (VLANs)..............................................................................................................................982
Default VLAN................................................................................................................................................................. 983
Port-Based VLANs........................................................................................................................................................ 983
VLANs and Port Tagging.............................................................................................................................................. 984
Conguration Task List..................................................................................................................................................984
Creating a Port-Based VLAN................................................................................................................................. 984
Assigning Interfaces to a VLAN............................................................................................................................. 985
Moving Untagged Interfaces..................................................................................................................................986
Assigning an IP Address to a VLAN.......................................................................................................................987
Conguring Native VLANs............................................................................................................................................987
Enabling Null VLAN as the Default VLAN...................................................................................................................988
61 Virtual Link Trunking (VLT).......................................................................................................................989
Overview.........................................................................................................................................................................989
VLT Terminology...................................................................................................................................................... 992
Layer-2 Trac in VLT Domains...............................................................................................................................993
Interspersed VLANs................................................................................................................................................ 994
VLT on Core Switches.............................................................................................................................................994
Enhanced VLT..........................................................................................................................................................995
Congure Virtual Link Trunking....................................................................................................................................996
Important Points to Remember............................................................................................................................. 996
Conguration Notes................................................................................................................................................ 997
Primary and Secondary VLT Peers...................................................................................................................... 1000
RSTP and VLT.........................................................................................................................................................1001
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Contents