Merging two separate DNS zones
- by cube
This is a hypothetical question.
Let's suppose I have two networks, each with its own DNS server.
Network A has names a1.local, a2.local, ... and network B has b1.local, b2.local, ....
Zone file for each of the networks looks something like this:
$ORIGIN local
@ IN SOA .... blah blah blah
a1 A 1.2.3.4
a2 A 2.3.4.5
...
for A, and
$ORIGIN local
@ IN SOA .... blah blah blah
b1 A 3.4.5.6
b2 A 4.5.6.7
...
for B.
Now I also have a regular internet domain example.com and I want to access the machines as a1.A.example.com, b1.B.example.com, ...
How will I have to change the configuration of name servers in networks A and B?
(in fact I am writing a super-magic DNS server, currently serving A and B separately, but there is a chance that I will have to add the ability to merge the networks; so I'm interested in knowing the problems which lie ahead of me and how to prepare for the possibility)
