Administrator Guide

Moving Untagged Interfaces.................................................................................................................................. 977
Assigning an IP Address to a VLAN.......................................................................................................................978
Conguring Native VLANs............................................................................................................................................978
Enabling Null VLAN as the Default VLAN...................................................................................................................979
61 Virtual Link Trunking (VLT).......................................................................................................................980
Overview........................................................................................................................................................................ 980
VLT Terminology...................................................................................................................................................... 983
Layer-2 Trac in VLT Domains...............................................................................................................................984
Interspersed VLANs................................................................................................................................................ 985
VLT on Core Switches............................................................................................................................................ 985
Enhanced VLT..........................................................................................................................................................986
Congure Virtual Link Trunking.................................................................................................................................... 987
Important Points to Remember..............................................................................................................................987
Conguration Notes................................................................................................................................................ 988
Primary and Secondary VLT Peers.........................................................................................................................991
RSTP and VLT...........................................................................................................................................................991
VLT Bandwidth Monitoring.....................................................................................................................................992
VLT and Stacking.....................................................................................................................................................992
VLT and IGMP Snooping........................................................................................................................................ 992
VLT IPv6................................................................................................................................................................... 992
VLT Port Delayed Restoration................................................................................................................................993
PIM-Sparse Mode Support on VLT.......................................................................................................................993
VLT Routing .............................................................................................................................................................995
Non-VLT ARP Sync................................................................................................................................................. 998
RSTP Conguration...................................................................................................................................................... 999
Preventing Forwarding Loops in a VLT Domain................................................................................................... 999
Sample RSTP Conguration...................................................................................................................................999
Conguring VLT..................................................................................................................................................... 1000
PVST+ Conguration....................................................................................................................................................1010
Sample PVST+ Conguration................................................................................................................................1010
Peer Routing Conguration Example.......................................................................................................................... 1011
Dell-1 Switch Conguration....................................................................................................................................1012
Dell-2 Switch Conguration...................................................................................................................................1016
R1 Conguration......................................................................................................................................................1019
Access Switch A1 Congurations and Verication.............................................................................................1020
eVLT Conguration Example....................................................................................................................................... 1021
eVLT Conguration Step Examples...................................................................................................................... 1021
PIM-Sparse Mode Conguration Example................................................................................................................1023
Verifying a VLT Conguration..................................................................................................................................... 1024
Additional VLT Sample Congurations.......................................................................................................................1027
Troubleshooting VLT.................................................................................................................................................... 1029
Reconguring Stacked Switches as VLT.................................................................................................................. 1030
Specifying VLT Nodes in a PVLAN............................................................................................................................ 1030
Association of VLTi as a Member of a PVLAN....................................................................................................1031
MAC Synchronization for VLT Nodes in a PVLAN............................................................................................. 1031
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