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Table Of Contents
UFD and NIC Teaming................................................................................................................................................... 959
Important Points to Remember...................................................................................................................................959
Configuring Uplink Failure Detection......................................................................................................................... 960
Clearing a UFD-Disabled Interface.............................................................................................................................. 961
Displaying Uplink Failure Detection.............................................................................................................................962
Sample Configuration: Uplink Failure Detection...................................................................................................... 964
Chapter 60: Upgrade Procedures.............................................................................................. 965
Chapter 61: Virtual LANs (VLANs)............................................................................................. 966
Default VLAN................................................................................................................................................................... 966
Port-Based VLANs..........................................................................................................................................................967
VLANs and Port Tagging...............................................................................................................................................967
Configuration Task List................................................................................................................................................. 968
Creating a Port-Based VLAN................................................................................................................................. 968
Assigning Interfaces to a VLAN.............................................................................................................................969
Moving Untagged Interfaces..................................................................................................................................970
Assigning an IP Address to a VLAN.......................................................................................................................971
Configuring Native VLANs.............................................................................................................................................971
Enabling Null VLAN as the Default VLAN..................................................................................................................972
Chapter 62: Virtual Link Trunking (VLT).................................................................................... 973
Overview........................................................................................................................................................................... 973
VLT Terminology....................................................................................................................................................... 975
Layer-2 Traffic in VLT Domains.............................................................................................................................976
Interspersed VLANs.................................................................................................................................................. 977
VLT on Core Switches............................................................................................................................................. 977
Enhanced VLT............................................................................................................................................................978
Configure Virtual Link Trunking................................................................................................................................... 979
Important Points to Remember............................................................................................................................. 979
Configuration Notes................................................................................................................................................. 980
Primary and Secondary VLT Peers....................................................................................................................... 983
RSTP and VLT........................................................................................................................................................... 983
VLT Bandwidth Monitoring.....................................................................................................................................984
VLT and Stacking......................................................................................................................................................984
VLT and IGMP Snooping.........................................................................................................................................984
VLT IPv6......................................................................................................................................................................984
VLT Port Delayed Restoration............................................................................................................................... 985
PIM-Sparse Mode Support on VLT...................................................................................................................... 985
VLT Routing ...............................................................................................................................................................987
Non-VLT ARP Sync..................................................................................................................................................990
RSTP Configuration....................................................................................................................................................... 990
Preventing Forwarding Loops in a VLT Domain................................................................................................ 990
Sample RSTP configuration.................................................................................................................................... 991
Configuring VLT......................................................................................................................................................... 991
PVST+ Configuration................................................................................................................................................... 1000
Peer Routing Configuration Example........................................................................................................................ 1001
Dell-1 Switch Configuration.................................................................................................................................. 1002
Dell-2 Switch Configuration..................................................................................................................................1006
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