Classless Reverse zones

[Bob Vance]

Thanks, Mark.

While we're at it :)
why do you say "NS RRsets" as opposed to simply "NS RRs" ?

And :)

> > Am I wrong?
>
> 	No.  Normally you delegate out the /24's or /16's that make up the
> 	the IN-ADDR.ARPA CIDR block.

Did you mean by that

   "No, you are not wrong.  You can use the CNAME method, but
    normally ...
   "
?
If so, *why* is it normal to do the N delegations as opposed to the
CNAME method (1 possible delegation, but N $GENERATEs).


-------------------------------------------------
Tks        | <mailto:BVance at sbm.com>
BV         | <mailto:BobVance at alumni.caltech.edu>
Sr. Technical Consultant,  SBM, A Gates/Arrow Co.
Vox 770-623-3430           11455 Lakefield Dr.
Fax 770-623-3429           Duluth, GA 30097-1511
=================================================





-----Original Message-----
From: marka at nominum.com [mailto:marka at nominum.com]On Behalf Of
Mark.Andrews at nominum.com
Sent: Thursday, March 15, 2001 9:37 PM
To: BVance at sbm.com
Cc: sbm-BIND-L (E-mail)
Subject: Re: Classless Reverse zones



> Thanks for the reply, but it did nothing to advance my understanding
of
> what you mean by bit aligned :|

	The bit patterns of 0,1,2,3 are the same apart or the last two bits,
	this is not true for 1,2,3,4 or 2,3,4,5 or 3,4,5,6.
>
>
> And I don't know how it relates to the original question.
>
> > > For example with a 22 bit mask do you have 4 NS recs in the parent
> > domain?
> >
> > 	Normally it's 4 consecutive, bit aligned, NS RRsets.
>
>
> -------------------------------------------------
> Tks        | <mailto:BVance at sbm.com>
> BV         | <mailto:BobVance at alumni.caltech.edu>
> Sr. Technical Consultant,  SBM, A Gates/Arrow Co.
> Vox 770-623-3430           11455 Lakefield Dr.
> Fax 770-623-3429           Duluth, GA 30097-1511
> =================================================
>
>
>
>
>
> -----Original Message-----
> From: marka at nominum.com [mailto:marka at nominum.com]On Behalf Of
> Mark.Andrews at nominum.com
> Sent: Thursday, March 15, 2001 8:18 PM
> To: bobvance at alumni.caltech.edu
> Cc: bind-users at isc.org
> Subject: Re: Classless Reverse zones
>
>
>
> >
> > >Normally it's 4 consecutive, bit aligned, NS RRsets.
> >
> > What in the heck does that mean?  :)
>
> 	0,1,2,3, are bit aligned, 1,2,3,4 are not.
> >
> >
> > >It really shouldn't be used for /0-/24.
> >
> > Why is that?
> > I was thinking that it would be used anytime you want to delegate on
> > *non-octet* boundaries, not just sub "Class C".  The reverse lookup
is
> > based on the octets, so if there is a split in authority in *any* of
> the
> > octets, then CNAMEs could be used to point to the correct zones.
> > Am I wrong?
>
> 	No.  Normally you delegate out the /24's or /16's that make up the
> 	the IN-ADDR.ARPA CIDR block.
>
> 	Mark
> >
> >
> > -------------------------------------------------
> > Tks        | <mailto:BVance at sbm.com>
> > BV         | <mailto:BobVance at alumni.caltech.edu>
> > Sr. Technical Consultant,  SBM, A Gates/Arrow Co.
> > Vox 770-623-3430           11455 Lakefield Dr.
> > Fax 770-623-3429           Duluth, GA 30097-1511
> > =================================================
> >