The NSX-T host overlay VLAN must be configured on the adjacent top-of-rack switches connected to the VxRail nodes.
The NSX-T host overlay VLAN must pass through the trunk ports connected to the VxRail nodes.
Depending on where the Layer 2/ Layer 3 boundary is in the supporting physical network, pass the NSX-T host overlay VLAN upstream through the uplinks on the adjacent top-of-rack switches to the spine switch layer.
IP addresses must be assigned to the switches at the Layer 2/ Layer 3 boundary to enable routing.
Configure IGMP Snooping and an IGMP Querier on the adjacent top-of-rack switches.