[Samba] dsquery with samba

[Norbert Wegener]

On windows there exists a dsquery tool, which helps to identify servers 
in the active directory.
using this like
dsquery server -isgc -domain ww901.test.net
lists all the global catalog servers of that domain.
Is it possible to get the same information about server in AD domains 
using samba-tools?
I thought, nmblookup could do the job, but did not succeed with it.
Thanks
Norbert Wegener