White Papers

Table Of Contents
Chapter 55: Tunneling................................................................................................................ 911
Configuring a Tunnel........................................................................................................................................................911
Configuring Tunnel Keepalive Settings.......................................................................................................................912
Configuring a Tunnel Interface.....................................................................................................................................912
Configuring Tunnel Allow-Remote Decapsulation....................................................................................................913
Configuring Tunnel source anylocal Decapsulation................................................................................................. 913
Guidelines for Configuring Multipoint Receive-Only Tunnels............................................................................... 914
Multipoint Receive-Only Tunnels.................................................................................................................................914
Chapter 56: Uplink Failure Detection (UFD)............................................................................... 915
Feature Description.........................................................................................................................................................915
How Uplink Failure Detection Works.......................................................................................................................... 916
UFD and NIC Teaming.................................................................................................................................................... 917
Important Points to Remember.................................................................................................................................... 917
Configuring Uplink Failure Detection.......................................................................................................................... 918
Clearing a UFD-Disabled Interface.............................................................................................................................. 919
Displaying Uplink Failure Detection............................................................................................................................ 920
Sample Configuration: Uplink Failure Detection......................................................................................................922
Chapter 57: Upgrade Procedures...............................................................................................923
Chapter 58: Virtual LANs (VLANs).............................................................................................924
Default VLAN................................................................................................................................................................... 924
Port-Based VLANs......................................................................................................................................................... 925
VLANs and Port Tagging.............................................................................................................................................. 925
Configuration Task List................................................................................................................................................. 926
Creating a Port-Based VLAN................................................................................................................................. 926
Assigning Interfaces to a VLAN.............................................................................................................................927
Moving Untagged Interfaces..................................................................................................................................928
Assigning an IP Address to a VLAN......................................................................................................................929
Configuring Native VLANs............................................................................................................................................929
Enabling Null VLAN as the Default VLAN................................................................................................................. 930
Chapter 59: Virtual Link Trunking (VLT).................................................................................... 931
Overview............................................................................................................................................................................931
VLT Terminology....................................................................................................................................................... 933
Layer-2 Traffic in VLT Domains.............................................................................................................................934
Interspersed VLANs..................................................................................................................................................935
VLT on Core Switches............................................................................................................................................. 935
Enhanced VLT............................................................................................................................................................936
Configure Virtual Link Trunking................................................................................................................................... 937
Important Points to Remember............................................................................................................................. 937
Configuration Notes................................................................................................................................................. 938
Primary and Secondary VLT Peers........................................................................................................................941
RSTP and VLT............................................................................................................................................................ 941
VLT Bandwidth Monitoring.....................................................................................................................................942
VLT and Stacking...................................................................................................................................................... 942
VLT and IGMP Snooping......................................................................................................................................... 942
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