non-24 bit subnets

[Alex McKenzie]

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Thanks for the quick reply, Matt.

Unfortunately, we do have need -- or at least a use -- to have smaller
subnets in multiple files, but without delegating authority.  The
problem is that some of those small subnets should have a shorter TTL,
or other settings changed.  If there's a way to change all the settings
by host in a single file, that would at least make that easier.

For larger subnets we can use multiple zones, but I'd hoped to avoid it
if possible.  It sounds from this like there isn't a way, though.

Thanks,
  Alex

Matt Baxter wrote:
> For larger subnets just use multiple zones as necessary.  
> 
> For 10.20.30.0/23 you have 30.20.10.in-addr.arpa and 31.20.10.in-addr.arpa.
> 
> For smaller than a /24 look at RFC 2317.  That's only necessary if you want to delegate authority to a different DNS server.  If you have multiple networks in a /24, all of the rDNS entries for those networks can exist in a single zone.
> 
> 
> On Oct 6, 2010, at 1:43 PM, Alex McKenzie wrote:
>>  But how do I deal with larger or smaller subnets?  Clearly I can't use
>> exactly the same notation, but I assume there has to be a way.  If
>> anyone can even point me at some documentation, I'd appreciate it --
>> I've been looking for a few days, and everything I've found assumes a
>> /24 subnet.
> 
> --
> Matt Baxter
> mjb at fatpipe.org
> 
> 
> 
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> bind-users at lists.isc.org
> https://lists.isc.org/mailman/listinfo/bind-users
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