how to setup revdns for /16 subnet

[Matus UHLAR - fantomas]

> > On 28.07.08 14:20, Tomasz Pajor wrote:
> > > > On 28.07.08 13:07, Tomasz Pajor wrote:
> > > > > How can I setup a revdns for a /16 subnet?
> > > > > Subnet is split to 1x /17 2x /18.
> > > 
> > > > what do you mean split? are they 3 different ranges you got from your RIR or
> > > > is that private subnet
> > > 
> > > I've got a /16 and it will be split into 3 subnets, and I want to create a
> > > separate revdns zone for each one.
> > 
> > create /16 reverse zone (b.a.in-addr.arpa), ask for delegatin of it, and
> > split it to /24's. It's not easy to split to zones for other ranges.

On 28.07.08 15:00, Tomasz Pajor wrote:
> I want to split it to one /17 and two /18, how can I do that?

it would be horrible and complicated. Just use /16's, 256 reverse zones for 
0.b.a.in-addr.arpa
1.b.a.in-addr.arpa
...
255.b.a.in-addr.arpa

and first (or last) 128 will be for the /17, first half (64) of the rest
will be first /18, remaining will belong to second /18

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