Configuring a Tunnel......................................................................................................................................................857
Configuring a Tunnel Interface..................................................................................................................................... 858
Feature Description........................................................................................................................................................ 861
UFD and NIC Teaming...................................................................................................................................................863
Important Points to Remember................................................................................................................................... 863
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
Configuration Task List.................................................................................................................................................. 873
Creating a Port-Based VLAN................................................................................................................................. 873
Assigning Interfaces to a VLAN..............................................................................................................................874
Moving Untagged Interfaces..................................................................................................................................875
Configuring Native VLANs............................................................................................................................................876
57 Virtual Link Trunking (VLT).......................................................................................................................878
Overview......................................................................................................................................................................... 878
VLT Terminology....................................................................................................................................................... 881
Layer-2 Traffic in VLT Domains...............................................................................................................................882
Interspersed VLANs................................................................................................................................................ 883
VLT on Core Switches.............................................................................................................................................883
Enhanced VLT.......................................................................................................................................................... 884
Configure Virtual Link Trunking.................................................................................................................................... 885
Important Points to Remember............................................................................................................................. 885
Configuration Notes................................................................................................................................................ 886
RSTP and VLT..........................................................................................................................................................889
VLT Bandwidth Monitoring.....................................................................................................................................890
VLT and Stacking.....................................................................................................................................................890
VLT and IGMP Snooping........................................................................................................................................ 890
28
Contents