[Samba] Samba and DNS backend question

[Miguel Angel Coa M.]

I had configured Samba AD's with Bind9_DLZ in all DC. But for some reason
(i couldn't determine) three (sambadc02,03,04) AD's responded very slowly
. So change to Samba_Internal backend into the servers with problem and
works fine.

sambadc01 -> with FSMO roles - Bind9_DLZ
sambadc02 -> Samba_Internal
sambadc03 -> Samba_Internal
sambadc04 -> Samba_Internal

My question is: ¿The DNS backend can be different between Ad's? ¿can affect
the performance?

Saludos.
---
Miguel Coa M.