A VxRail cluster can be extended beyond a single physical rack to as many as six racks. All the network addresses applied to VxRail nodes within a single rack must be within the same subnet.
If the VxRail cluster extends beyond a single rack, the following options apply:
Use the same assigned subnet ranges for all VxRail nodes in the expansion rack.
For VxRail 4.7.300 and later, assign a new subnet range with a new gateway to the VxRail nodes in the expansion racks.
The following conditions must be met to expand a cluster beyond a single rack with a new subnet range:
Your VxRail cluster must be running VxRail 4.7.300 or later.
You are not deploying VCF on the VxRail cluster.
If the same subnets are extended to the expansion racks, configure the VLANs representing those VxRail networks on the ToR switches in each expansion rack. You must also establish physical connectivity. If new subnets are used for the VxRail nodes and management components in the expansion racks, the VLANs terminate at the router layer. You must configure routing services to enable connectivity between the racks.
Figure 1. Multirack VxRail sharing the same subnet. Multirack VxRail sharing the same subnet
Figure 2. Multirack VxRail with different subnets. Multirack VxRail with different subnets
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