Specific VxRail networks, including the VxRail external management network and any external-facing end-user networks that are configured for VxRail, must have routing services that are enabled to support connectivity to external services and applications, as well as end-users.
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, then 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, then the VLANs will terminate at the router layer and routing services must be configured to enable connectivity between the racks.
Figure 13 MultiRack VxRail sharing the same subnet
Figure 14 MultiRack VxRail with different subnets
Figure 15 VTEP tunneling between switches