[Samba] Fwd: DHCP Updates to DNS - Multiple Entries with Same IP

[Rowland penny]

On 21/05/2020 12:22, Derek Cramer via samba wrote:
> I had exactly the same issue with dual dhcp servers. I solved it by
> modifying the script to do conditional updates. I.e. only add the A/PTR
> entries if they are not already present.

Now that is a good idea, why didn't I think of it ;-)

I have identified a slight bug with the 'add' part, if you reboot a 
client and it releases the IP, then when the the client comes up and the 
script is run, it claims the update has failed, even though it has 
succeeded. I have a fix.

The problem with the 'failover' is down to using '128' on both DC's, 
this leads to both of them replying to requests, I will update the 
wikipage to use '255' on the primary and '0' on the secondary. This 
should lead to only one (the primary) replying unless the primary goes down.

Rowland