Classless in-addr.arpa delegation

[Ryan Weaver]

    The way I tend to delegate less than a class C, since we do not have
control of the entire class B is this...

; 240/28 (16ips)
; Subnet Resolution Delegated to Another DNS.
; Delegated DNS zone entry will look like
; zone "240-28.1.168.192.in-addr.arpa" {
;         type master;
;         file "in-addr/240-28.1.168.192.in-addr.arpa";
; };
; NS Alias and zone entry tags must match. (ie: 240-28)
ns.false.com    IN      A       192.168.1.242
ns2.false.com   IN      A       192.168.1.250
240-28          NS      ns.false.com.
240-28          NS      ns2.false.com.
240             IN      CNAME   240.240-28.1.168.192.in-addr.arpa.
241             IN      CNAME   241.240-28.1.168.192.in-addr.arpa.
242             IN      CNAME   242.240-28.1.168.192.in-addr.arpa.
243             IN      CNAME   243.240-28.1.168.192.in-addr.arpa.
244             IN      CNAME   244.240-28.1.168.192.in-addr.arpa.
245             IN      CNAME   245.240-28.1.168.192.in-addr.arpa.
246             IN      CNAME   246.240-28.1.168.192.in-addr.arpa.
247             IN      CNAME   247.240-28.1.168.192.in-addr.arpa.
248             IN      CNAME   248.240-28.1.168.192.in-addr.arpa.
249             IN      CNAME   249.240-28.1.168.192.in-addr.arpa.
250             IN      CNAME   250.240-28.1.168.192.in-addr.arpa.
251             IN      CNAME   251.240-28.1.168.192.in-addr.arpa.
252             IN      CNAME   252.240-28.1.168.192.in-addr.arpa.
253             IN      CNAME   253.240-28.1.168.192.in-addr.arpa.
254             IN      CNAME   254.240-28.1.168.192.in-addr.arpa.
255             IN      CNAME   255.240-28.1.168.192.in-addr.arpa.

----- Original Message -----
From: "Robert Stoll" <bob at esr.com>
To: <comp-protocols-dns-bind at moderators.isc.org>
Sent: Friday, January 05, 2001 6:40 PM
Subject: Classless in-addr.arpa delegation


>
> Hi everyone,
>    I'm looking for the best way to delegate part of an in-addr.arpa domain
> to another name server.  Let me paint the picture for you:
>
>    We have a CIDR block assigned from our ISP, for the sake of this message,
> let's say its 172.16.0.0/18, which gives me 64 class C nets, 172.16.0.0 -
> 172.16.63.0.  I want a branch office to have complete control over one of
> the class C address spaces.  Setting up the forward delegation is easy, but
> what is the best way of delegating the reverse?  I've read through RFC 2317,
> and I agree that it is pretty ugly, but since it is a couple of years old
> I'm hoping there is a better way of doing it.
>
>   I'm sure I'm not the only person who has had to do this, so I'm hoping one
> of you can help me out.  Sample zone files would be appreciated. :-)
>
>
> Thanks much.
>
> Bob...
>
>
>
>