[Samba] DNS Problem Windows Client

[basti]

Hello,
I have a Samba Domain with 2 Bind/ Samba DLZ DNS Servers.
So far so good. I'm not shure if this is a Samba or a Windows problem.

When the first DNS Server in the list is failed for some reason the
Windows client run into a timeout and does not switch to secondary DNS.

When I use nslookup and query the secondary DNS I get an answer.
Log attached.

Any idea whats wrong here?

Best Regards,


C:\Users\admin>ipconfig /all | findstr /R 30.
   IPv4-Adresse  . . . . . . . . . . : 192.168.30.4(Bevorzugt)
   Standardgateway . . . . . . . . . : 192.168.30.1
   DHCP-Server . . . . . . . . . . . : 192.168.30.1
   DNS-Server  . . . . . . . . . . . : 192.168.30.2
                                       192.168.30.6

C:\Users\admin>nslookup heise.de
DNS request timed out.
    timeout was 2 seconds.
Server:  UnKnown
Address:  192.168.30.2

DNS request timed out.
    timeout was 2 seconds.
DNS request timed out.
    timeout was 2 seconds.
DNS request timed out.
    timeout was 2 seconds.
DNS request timed out.
    timeout was 2 seconds.
*** Zeitüberschreitung bei Anforderung an UnKnown.

C:\Users\admin>nslookup heise.de 192.168.30.6
Server:  dc2.samdom.example.com
Address:  192.168.30.6

Nicht autorisierende Antwort:
Name:    heise.de
Addresses:  2a02:2e0:3fe:1001:302::
          193.99.144.80


C:\Users\admin>