PTR delegation 16 IPs

[Mark.Andrews at nominum.com]

> Mark.Andrews at nominum.com wrote:
> > 
> > Try "$ORIGIN 120/29.42.112.216.in-addr.arpa."
> > 
> > Try "$ORIGIN 224/28.141.36.208.in-addr.arpa."
> > 

	The "$ORIGIN" was because you were using "$@".

	Classless IN-ADDR.ARPA delegation is described in RFC 2317.

	My preferred scheme is to use <first>-<last>.XXX.YYY.ZZZ.IN-ADDR.ARPA 
	as this avoids some bugs from BIND betas that got shipped with
	some linux distributions.

	208.36.141.224/28 is 208.36.141.224 - 208.36.141.239.  The
	mask indicated by /28 is 255.255.255.240.

	I would be using 224-239.141.36.208.IN-ADDR.ARPA instead of
	224/28.141.36.208.IN-ADDR.ARPA and 120-127.42.112.216.IN-ADDR.ARPA
	instead of 120/29.42.112.216.IN-ADDR.ARPA.

	Mark


> I have emailed mark as well as posted this.
> 
> I can't find documentation on the in-addr prefix used as above. I
> thought I knew but am now confused and would like an explanation or a
> pointer to same. I do not own a current copy of the book.
> 
> Now that I've asked, let say that I think this in-addr prefix is
> a netmask the same ip-prefix.
> 
> Thanks all
> -- 
> _____________________________________________________________________________
> ___
> G. Roderick Singleton, <gsingleton at home.com> PATH tech,
> 71 Underhill Drive, Unit 159, Toronto, ON  M3A 2J8
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--
Mark Andrews, Nominum Inc. / Internet Software Consortium
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742                 INTERNET: Mark.Andrews at nominum.com