Preparing a vSphere cluster for NSX

Preparing a vSphere cluster for NSX does two things:

1. It installs NSX Kernel modules on each ESXi host, which is a member of the vSphere cluster
2. It builds the NSX control-plane and management-plane fabric

NSX Kernel modules are packaged as VMware installation bundles (VIBs) and provide functionality such as distributed routing, distributed firewall, and VXLAN bridging.