Administrator Guide

Conguring a Tunnel......................................................................................................................................................857
Conguring Tunnel Keepalive Settings........................................................................................................................858
Conguring a Tunnel Interface.....................................................................................................................................858
Conguring Tunnel Allow-Remote Decapsulation......................................................................................................859
Conguring the Tunnel Source Anylocal.....................................................................................................................859
54 Uplink Failure Detection (UFD).................................................................................................................861
Feature Description........................................................................................................................................................861
How Uplink Failure Detection Works........................................................................................................................... 862
UFD and NIC Teaming...................................................................................................................................................863
Important Points to Remember................................................................................................................................... 863
Conguring Uplink Failure Detection...........................................................................................................................864
Clearing a UFD-Disabled Interface.............................................................................................................................. 865
Displaying Uplink Failure Detection..............................................................................................................................866
Sample Conguration: Uplink Failure Detection.........................................................................................................868
55 Upgrade Procedures................................................................................................................................ 870
Get Help with Upgrades................................................................................................................................................870
56 Virtual LANs (VLANs)...............................................................................................................................871
Default VLAN..................................................................................................................................................................872
Port-Based VLANs........................................................................................................................................................ 872
VLANs and Port Tagging...............................................................................................................................................873
Conguration Task List.................................................................................................................................................. 873
Creating a Port-Based VLAN................................................................................................................................. 873
Assigning Interfaces to a VLAN..............................................................................................................................874
Moving Untagged Interfaces..................................................................................................................................875
Assigning an IP Address to a VLAN.......................................................................................................................876
Conguring Native VLANs............................................................................................................................................876
Enabling Null VLAN as the Default VLAN................................................................................................................... 877
57 Virtual Link Trunking (VLT).......................................................................................................................878
Overview.........................................................................................................................................................................878
VLT Terminology....................................................................................................................................................... 881
Layer-2 Trac in VLT Domains...............................................................................................................................882
Interspersed VLANs................................................................................................................................................ 883
VLT on Core Switches.............................................................................................................................................883
Enhanced VLT.......................................................................................................................................................... 884
Congure Virtual Link Trunking.................................................................................................................................... 885
Important Points to Remember............................................................................................................................. 885
Conguration Notes................................................................................................................................................ 886
Primary and Secondary VLT Peers........................................................................................................................889
RSTP and VLT..........................................................................................................................................................889
VLT Bandwidth Monitoring.....................................................................................................................................890
VLT and Stacking.....................................................................................................................................................890
VLT and IGMP Snooping........................................................................................................................................ 890
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