non-24 bit subnets

[Jay Ford]

On Wed, 6 Oct 2010, Alex McKenzie wrote:
> 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.

You could use one real zone file which is referenced by named.conf, with 
$INCLUDE directives in that zone file to pull in the parts of the zone from 
files containing the subsets you want.  A $TTL directive at the top of each 
small file should give you the variable TTL defaulting you want.

> 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.

Right.

________________________________________________________________________
Jay Ford, Network Engineering Group, Information Technology Services
University of Iowa, Iowa City, IA 52242
email: jay-ford at uiowa.edu, phone: 319-335-5555, fax: 319-335-2951