Administrator Guide

Conguring Tunnel Keepalive Settings........................................................................................................................ 951
Conguring a Tunnel Interface......................................................................................................................................951
Conguring Tunnel Allow-Remote Decapsulation......................................................................................................952
Conguring the Tunnel Source Anylocal.....................................................................................................................952
58 Uplink Failure Detection (UFD)................................................................................................................ 954
Feature Description....................................................................................................................................................... 954
How Uplink Failure Detection Works...........................................................................................................................955
UFD and NIC Teaming...................................................................................................................................................956
Important Points to Remember................................................................................................................................... 956
Conguring Uplink Failure Detection........................................................................................................................... 957
Clearing a UFD-Disabled Interface.............................................................................................................................. 958
Displaying Uplink Failure Detection..............................................................................................................................959
Sample Conguration: Uplink Failure Detection..........................................................................................................961
59 Upgrade Procedures................................................................................................................................ 963
Get Help with Upgrades............................................................................................................................................... 963
60 Virtual LANs (VLANs)..............................................................................................................................964
Default VLAN................................................................................................................................................................. 965
Port-Based VLANs........................................................................................................................................................965
VLANs and Port Tagging.............................................................................................................................................. 966
Conguration Task List..................................................................................................................................................966
Creating a Port-Based VLAN.................................................................................................................................966
Assigning Interfaces to a VLAN............................................................................................................................. 967
Moving Untagged Interfaces..................................................................................................................................968
Assigning an IP Address to a VLAN.......................................................................................................................969
Conguring Native VLANs........................................................................................................................................... 969
Enabling Null VLAN as the Default VLAN...................................................................................................................970
61 Virtual Link Trunking (VLT)........................................................................................................................971
Overview..........................................................................................................................................................................971
VLT Terminology.......................................................................................................................................................974
Layer-2 Trac in VLT Domains...............................................................................................................................975
Interspersed VLANs.................................................................................................................................................976
VLT on Core Switches.............................................................................................................................................976
Enhanced VLT...........................................................................................................................................................977
Congure Virtual Link Trunking.................................................................................................................................... 978
Important Points to Remember..............................................................................................................................978
Conguration Notes................................................................................................................................................ 979
Primary and Secondary VLT Peers........................................................................................................................982
RSTP and VLT..........................................................................................................................................................983
VLT Bandwidth Monitoring.....................................................................................................................................983
VLT and Stacking.....................................................................................................................................................983
VLT and IGMP Snooping........................................................................................................................................ 983
VLT IPv6................................................................................................................................................................... 984
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