Users Guide

VLT Terminology...................................................................................................................................................... 890
Layer-2 Trac in VLT Domains............................................................................................................................... 891
Interspersed VLANs................................................................................................................................................ 892
VLT on Core Switches.............................................................................................................................................892
Enhanced VLT.......................................................................................................................................................... 893
Congure Virtual Link Trunking.................................................................................................................................... 894
Important Points to Remember............................................................................................................................. 894
Conguration Notes................................................................................................................................................ 895
Primary and Secondary VLT Peers........................................................................................................................898
RSTP and VLT..........................................................................................................................................................898
VLT Bandwidth Monitoring.....................................................................................................................................899
VLT and Stacking.....................................................................................................................................................899
VLT and IGMP Snooping........................................................................................................................................ 899
VLT IPv6................................................................................................................................................................... 899
VLT Port Delayed Restoration................................................................................................................................900
PIM-Sparse Mode Support on VLT.......................................................................................................................900
VLT Routing .............................................................................................................................................................902
Non-VLT ARP Sync.................................................................................................................................................905
RSTP Conguration...................................................................................................................................................... 906
Preventing Forwarding Loops in a VLT Domain...................................................................................................906
Sample RSTP Conguration...................................................................................................................................906
Conguring VLT....................................................................................................................................................... 907
PVST+ Conguration..................................................................................................................................................... 917
Sample PVST+ Conguration..................................................................................................................................917
Peer Routing Conguration Example...........................................................................................................................918
Dell-1 Switch Conguration..................................................................................................................................... 919
Dell-2 Switch Conguration....................................................................................................................................923
R1 Conguration.......................................................................................................................................................926
Access Switch A1 Congurations and Verication...............................................................................................927
eVLT Conguration Example........................................................................................................................................ 928
eVLT Conguration Step Examples.......................................................................................................................928
PIM-Sparse Mode Conguration Example.................................................................................................................930
Verifying a VLT Conguration....................................................................................................................................... 931
Additional VLT Sample Congurations........................................................................................................................ 934
Troubleshooting VLT......................................................................................................................................................936
Reconguring Stacked Switches as VLT.................................................................................................................... 937
Specifying VLT Nodes in a PVLAN.............................................................................................................................. 937
Association of VLTi as a Member of a PVLAN.....................................................................................................938
MAC Synchronization for VLT Nodes in a PVLAN.............................................................................................. 938
PVLAN Operations When One VLT Peer is Down...............................................................................................939
PVLAN Operations When a VLT Peer is Restarted.............................................................................................939
Interoperation of VLT Nodes in a PVLAN with ARP Requests.......................................................................... 939
Scenarios for VLAN Membership and MAC Synchronization With VLT Nodes in PVLAN............................ 939
Conguring a VLT VLAN or LAG in a PVLAN.............................................................................................................941
Creating a VLT LAG or a VLT VLAN.......................................................................................................................941
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