Home > Networking Solutions > Converged and Hyperconverged Solutions > VxRail Networking Solutions > Guides > Dell EMC Networking SmartFabric Services Deployment with VxRail 7.0 > Expand SmartFabric and VxRail cluster to multirack
CAUTION: Do not connect any new switches in SmartFabric mode to the fabric until the preferred master settings are validated on the existing and new switches. This is covered in the Verify preferred master setting before fabric expansion section of this chapter.
In this chapter, the SmartFabric is expanded to a second rack with the addition of Spine1, Spine2, Leaf2A, and Leaf2B. After the fabric is expanded, VxRail node 4 in Rack 2 is added to the existing VxRail cluster.
Note: SFS supports up to 20 switches in the fabric. This scales to nine racks if two spines and 18 leafs are used. Any combination of leafs and spines may be used with the exception that leaf switches must be deployed in pairs, and at least two spines are used. VxRail does not support single spine deployments.
Figure 62. SmartFabric and VxRail cluster expansion