Users Guide
Overview.........................................................................................................................................................................992
VLT Terminology...................................................................................................................................................... 995
Layer-2 Trac in VLT Domains.............................................................................................................................. 996
Interspersed VLANs.................................................................................................................................................997
VLT on Core Switches.............................................................................................................................................997
Enhanced VLT..........................................................................................................................................................998
Congure Virtual Link Trunking....................................................................................................................................999
Important Points to Remember............................................................................................................................. 999
Conguration Notes...............................................................................................................................................1000
Primary and Secondary VLT Peers...................................................................................................................... 1003
RSTP and VLT........................................................................................................................................................ 1004
VLT Bandwidth Monitoring...................................................................................................................................1004
VLT and Stacking................................................................................................................................................... 1004
VLT and IGMP Snooping.......................................................................................................................................1004
VLT IPv6..................................................................................................................................................................1005
VLT Port Delayed Restoration.............................................................................................................................. 1005
PIM-Sparse Mode Support on VLT..................................................................................................................... 1005
VLT Routing ........................................................................................................................................................... 1007
Non-VLT ARP Sync................................................................................................................................................ 1010
RSTP Conguration.......................................................................................................................................................1011
Preventing Forwarding Loops in a VLT Domain................................................................................................... 1011
Sample RSTP conguration................................................................................................................................... 1011
Conguring VLT...................................................................................................................................................... 1012
PVST+ Conguration................................................................................................................................................... 1022
Sample PVST+ Conguration............................................................................................................................... 1022
Peer Routing Conguration Example.........................................................................................................................1023
Dell-1 Switch Conguration................................................................................................................................... 1024
Dell-2 Switch Conguration.................................................................................................................................. 1028
R1 Conguration......................................................................................................................................................1031
Access Switch A1 Congurations and Verication.............................................................................................1032
eVLT Conguration Example.......................................................................................................................................1033
eVLT Conguration Step Examples......................................................................................................................1033
PIM-Sparse Mode Conguration Example............................................................................................................... 1035
Verifying a VLT Conguration.....................................................................................................................................1036
Additional VLT Sample Congurations.......................................................................................................................1039
Troubleshooting VLT..................................................................................................................................................... 1041
Reconguring Stacked Switches as VLT...................................................................................................................1042
Specifying VLT Nodes in a PVLAN............................................................................................................................ 1042
Association of VLTi as a Member of a PVLAN................................................................................................... 1043
MAC Synchronization for VLT Nodes in a PVLAN.............................................................................................1043
PVLAN Operations When One VLT Peer is Down............................................................................................. 1044
PVLAN Operations When a VLT Peer is Restarted........................................................................................... 1044
Interoperation of VLT Nodes in a PVLAN with ARP Requests.........................................................................1044
Scenarios for VLAN Membership and MAC Synchronization With VLT Nodes in PVLAN...........................1044
Conguring a VLT VLAN or LAG in a PVLAN...........................................................................................................1046
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