Two hidden masters - sending notifications to public slaves.

[Maren S. Leizaola]

Hello,

We are setting up to do zone generations of two separate hidden masters 
which will take turns on the zone generation.

Public/visible DNS servers "should" get notifies from both servers and 
select the one with the with the highest serial number.

I am planning to run bind on one server and knot on the other. On bind i 
have the issue that it would not send notifies to the name servers until 
I turned on "notify-soa  yes;". However I realise that his will only 
notify one single DNS server and introduces a single point of failure.

How do I get bind to send notifies directly to each of the servers?

Regards,
Maren