Setting Recurring Daylight Saving Time............................................................................................................... 89552 Tunneling................................................................................................................................................. 897Configuring a Tunnel......................................................................................................................................................897Configuring Tunnel Keepalive Settings........................................................................................................................898Configuring a Tunnel Interface..................................................................................................................................... 899Configuring Tunnel Allow-Remote Decapsulation......................................................................................................899Configuring Tunnel source anylocal Decapsulation................................................................................................... 900Guidelines for Configuring Multipoint Receive-Only Tunnels...................................................................................900Multipoint Receive-Only Tunnels.................................................................................................................................90053 Uplink Failure Detection (UFD).................................................................................................................901Feature Description........................................................................................................................................................901How Uplink Failure Detection Works........................................................................................................................... 902UFD and NIC Teaming...................................................................................................................................................903Important Points to Remember................................................................................................................................... 903Configuring Uplink Failure Detection...........................................................................................................................904Clearing a UFD-Disabled Interface.............................................................................................................................. 905Displaying Uplink Failure Detection..............................................................................................................................906Sample Configuration: Uplink Failure Detection.........................................................................................................90854 Upgrade Procedures................................................................................................................................909Get Help with Upgrades............................................................................................................................................... 90955 Virtual LANs (VLANs).............................................................................................................................. 910Default VLAN...................................................................................................................................................................911Port-Based VLANs..........................................................................................................................................................911VLANs and Port Tagging............................................................................................................................................... 912Configuration Task List.................................................................................................................................................. 912Creating a Port-Based VLAN..................................................................................................................................912Assigning Interfaces to a VLAN..............................................................................................................................913Moving Untagged Interfaces.................................................................................................................................. 914Assigning an IP Address to a VLAN....................................................................................................................... 915Configuring Native VLANs............................................................................................................................................ 915Enabling Null VLAN as the Default VLAN................................................................................................................... 91656 Virtual Link Trunking (VLT)....................................................................................................................... 917Overview..........................................................................................................................................................................917VLT Terminology...................................................................................................................................................... 920Layer-2 Traffic in VLT Domains............................................................................................................................... 921Interspersed VLANs................................................................................................................................................ 922VLT on Core Switches.............................................................................................................................................922Enhanced VLT.......................................................................................................................................................... 923Configure Virtual Link Trunking.................................................................................................................................... 924Important Points to Remember..............................................................................................................................924Configuration Notes................................................................................................................................................ 925Contents 29
