A VxRail cluster can be extended beyond a single physical rack and can extend to as many as six racks. All the network addresses applied to the VxRail nodes within a single rack must be within the same subnet.
You have two options if the VxRail cluster extends beyond a single rack:
If the same subnets are extended to the expansion racks, the VLANs representing those VxRail networks must be configured on the top-of-rack switches in each expansion rack, and physical connectivity must be established. If new subnets are used for the VxRail nodes and management components in the expansion racks, the VLANs will terminate at the router layer, and routing services must be configured to enable connectivity between the racks.