Concept Guide
Congure Virtual Link Trunking.................................................................................................................................. 1069
Important Points to Remember............................................................................................................................1069
Conguration Notes...............................................................................................................................................1070
Primary and Secondary VLT Peers.......................................................................................................................1073
RSTP and VLT.........................................................................................................................................................1074
VLT Bandwidth Monitoring....................................................................................................................................1074
VLT and Stacking....................................................................................................................................................1074
VLT and IGMP Snooping....................................................................................................................................... 1074
VLT IPv6.................................................................................................................................................................. 1075
VLT Port Delayed Restoration...............................................................................................................................1075
PIM-Sparse Mode Support on VLT......................................................................................................................1075
VLT Routing ............................................................................................................................................................1077
Non-VLT ARP Sync................................................................................................................................................1080
RSTP Conguration......................................................................................................................................................1081
Preventing Forwarding Loops in a VLT Domain.................................................................................................. 1081
Sample RSTP conguration...................................................................................................................................1081
Conguring VLT......................................................................................................................................................1082
PVST+ Conguration................................................................................................................................................... 1092
Sample PVST+ Conguration............................................................................................................................... 1093
Peer Routing Conguration Example.........................................................................................................................1093
Dell-1 Switch Conguration...................................................................................................................................1094
Dell-2 Switch Conguration..................................................................................................................................1098
R1 Conguration.......................................................................................................................................................1101
Access Switch A1 Congurations and Verication..............................................................................................1102
eVLT Conguration Example....................................................................................................................................... 1103
eVLT Conguration Step Examples...................................................................................................................... 1103
PIM-Sparse Mode Conguration Example................................................................................................................ 1105
Verifying a VLT Conguration......................................................................................................................................1106
Additional VLT Sample Congurations....................................................................................................................... 1109
Troubleshooting VLT.......................................................................................................................................................1111
Reconguring Stacked Switches as VLT.................................................................................................................... 1112
Specifying VLT Nodes in a PVLAN..............................................................................................................................1112
Association of VLTi as a Member of a PVLAN.....................................................................................................1113
MAC Synchronization for VLT Nodes in a PVLAN.............................................................................................. 1113
PVLAN Operations When One VLT Peer is Down...............................................................................................1114
PVLAN Operations When a VLT Peer is Restarted.............................................................................................1114
Interoperation of VLT Nodes in a PVLAN with ARP Requests.......................................................................... 1114
Scenarios for VLAN Membership and MAC Synchronization With VLT Nodes in PVLAN............................ 1114
Conguring a VLT VLAN or LAG in a PVLAN............................................................................................................ 1116
Creating a VLT LAG or a VLT VLAN......................................................................................................................1116
Associating the VLT LAG or VLT VLAN in a PVLAN........................................................................................... 1117
Proxy ARP Capability on VLT Peer Nodes..................................................................................................................1118
Working of Proxy ARP for VLT Peer Nodes......................................................................................................... 1118
VLT Nodes as Rendezvous Points for Multicast Resiliency......................................................................................1119
Conguring VLAN-Stack over VLT............................................................................................................................. 1119
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