6.4 configmgr allows users to "Add Port" under the Servers tab. If you create a new port, a new farm gets created, but I do not see how to add servers to the farm. The new farm does not have the ability to expand (existing definitions allow for expansion and the ability to "Replace"
This may be related to an issue found in the hardware section.(https://track.hpccsystems.com/browse/HPCC-17737)