Home > Integrated Products > VxRail > Guides > Planning Guide—VMware Cloud Foundation 5.1 on VxRail > Select virtual distributed switch for NSX overlay networks
A virtual distributed switch will be configured on the VxRail cluster to manage VxRail-required networks. The NSX overlay networks can be configured to use this same virtual distributed switch, and/or a separate virtual distributed switch can be configured for this purpose. If a new virtual distributed switch is configured to support NSX overlay networking, then a pair of NICs must be reserved on each VxRail node to support these networks.