Administrator Guide

VLT Terminology......................................................................................................................................................978
Layer-2 Traffic in VLT Domains.............................................................................................................................979
Interspersed VLANs................................................................................................................................................ 980
VLT on Core Switches............................................................................................................................................980
Enhanced VLT.......................................................................................................................................................... 981
Configure Virtual Link Trunking................................................................................................................................... 982
Important Points to Remember.............................................................................................................................982
Configuration Notes................................................................................................................................................983
Primary and Secondary VLT Peers....................................................................................................................... 986
RSTP and VLT......................................................................................................................................................... 986
VLT Bandwidth Monitoring.................................................................................................................................... 987
VLT and Stacking.....................................................................................................................................................987
VLT and IGMP Snooping........................................................................................................................................ 987
VLT IPv6................................................................................................................................................................... 987
VLT Port Delayed Restoration...............................................................................................................................988
PIM-Sparse Mode Support on VLT...................................................................................................................... 988
VLT Routing ............................................................................................................................................................ 990
Non-VLT ARP Sync................................................................................................................................................ 993
RSTP Configuration...................................................................................................................................................... 994
Preventing Forwarding Loops in a VLT Domain.................................................................................................. 994
Sample RSTP Configuration.................................................................................................................................. 994
Configuring VLT.......................................................................................................................................................995
PVST+ Configuration.................................................................................................................................................. 1005
Sample PVST+ Configuration.............................................................................................................................. 1005
Peer Routing Configuration Example........................................................................................................................ 1006
Dell-1 Switch Configuration.................................................................................................................................. 1007
Dell-2 Switch Configuration................................................................................................................................... 1011
R1 Configuration......................................................................................................................................................1014
Access Switch A1 Configurations and Verification.............................................................................................1015
eVLT Configuration Example.......................................................................................................................................1016
eVLT Configuration Step Examples..................................................................................................................... 1016
PIM-Sparse Mode Configuration Example................................................................................................................1018
Verifying a VLT Configuration.....................................................................................................................................1019
Additional VLT Sample Configurations......................................................................................................................1022
Troubleshooting VLT................................................................................................................................................... 1024
Reconfiguring Stacked Switches as VLT..................................................................................................................1025
Specifying VLT Nodes in a PVLAN............................................................................................................................1025
Association of VLTi as a Member of a PVLAN...................................................................................................1026
MAC Synchronization for VLT Nodes in a PVLAN............................................................................................1026
PVLAN Operations When One VLT Peer is Down.............................................................................................1027
PVLAN Operations When a VLT Peer is Restarted...........................................................................................1027
Interoperation of VLT Nodes in a PVLAN with ARP Requests........................................................................1027
Scenarios for VLAN Membership and MAC Synchronization With VLT Nodes in PVLAN.......................... 1027
Configuring a VLT VLAN or LAG in a PVLAN.......................................................................................................... 1029
Creating a VLT LAG or a VLT VLAN................................................................................................................... 1029
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