If your plans include the deployment of a VxRail stretched cluster, additional network settings must be captured. The second table in the VxRail Network Configuration appendix includes the additional network settings required for VxRail stretched clusters.
Capture the settings to deploy the witness virtual appliance at the third site, which is required before performing initial build of the VxRail stretched cluster.
Additional network settings need to be captured for the second site. Depending on the decisions made for the stretched cluster deployment, additional network configuration must be performed at the second site: