Hi all ,
If you are getting issue during prapare host in vcloud you can follow few checks.
-Try to resolve vlcoud director ,so that you can check proper dns entry is there.
-Try to resolve Hosts which you are trying to prepare.
-login to Vcloud Director and check if it is in domain or not.
-Login to Vcloud and try to resolve Hosts .
Hope these steps will help to resolve few error ...