Multiple Master Servers

[Kevin Darcy]

You can define any number of BIND nameservers you wish as all being
"master" for a particular zone. So, superficially, BIND supports "multiple
masters". Consider how many BIND nameservers define
"1.0.0.127.in-addr.arpa" or "0.0.127.in-addr.arpa" as a master zone. But
that's not really the issue. The issue is: how do you then replicate the
data? The only replication mechanism directly supported by BIND is AXFR/IXFR,
which is just a straight, one-way master->slave replication. If you want some
replication method which does replication in both directions between
"masters", and automatically resolves the inevitable replication conflicts,
you'll have to write that part yourself in conjunction with BIND, or use a
different DNS implementation altogether.


- Kevin

Morris Balamut wrote:

> Couple of questions,
>
> 1. Does BIND officially support multiple masters? I have been told that
> while it works,
>    it is not really supported. What's the story?
>
> 2. In the case of multiple masters on a network running DDNS, is there am
> issue of
>     synchronization of the masters if one or more of them to not receive or
> for some
>     reason can not handle the DDNS update?