[Samba] Bind_DLZ and two AD DC

[Rowland Penny]

On Fri, 21 Oct 2016 13:26:28 -0500
Bob of Donelson Trophy via samba <samba at lists.samba.org> wrote:

> My first Active Directory setup had two DC's and shortly after getting
> things going the second DC created a hardware failure issue and I just
> continued life with one DC. 
> 
> Now, while upgrading I am returning to two DC's. 
> 
> In a normal Bind9 "master and slave" setup the master always "feeds"
> the slave. 
> 
> With Bind9_DLZ setup (recommended to be used with Samba4) there is no
> "master and slave" setup. This "master and slave" configuration is NOT
> recommended for use in our (Samba4) situations and/or a Bind9_DLZ
> configuration. 
> 
> How does Bind9_DLZ "keep up" with each other (in a two AD DC
> environment) when one of the DC's go "off line"? The second DC
> continues to maintain the connections. When the first DC returns, how
> does it "catch up" so to speak? 
> 
> Probably been asked many, many times but I am finding conflicting
> info. 
> 
> A brief explanation would be appreciated?
> 

Hi Bob, Bind9_DLZ doesn't 'keep up' with each other, AD does ;-)

All the dns records are stored in AD and the dns doesn't work in 'master
and slave', it works in 'Multi-master'.

Try reading these:

https://technet.microsoft.com/en-gb/library/cc959306.aspx

https://technet.microsoft.com/en-gb/library/cc759550%28v=ws.10%29.aspx?f=255&MSPPError=-2147217396

Rowland