Architecting a VMware NSX Solution : Recoverability : 9.5 VMware vSphere Distributed Switch Recoverability
   
9.5 VMware vSphere Distributed Switch Recoverability
You can export VMware vSphere Distributed Switchâ„¢ and distributed port group configurations to a file. The file preserves valid network configurations, enabling distribution of these configurations to other deployments. This functionality is available only with vSphere Web Client 5.1 or later.
Note A best practice is to export the vSphere Distributed Switch configuration before preparing the cluster for VXLAN.