Format of the IPv6 reversed zone

[Khuu, Linh Contractor]

Thanks Jay and Leonard for the pointers of IPv6 format.

Linh Khuu


-----Original Message-----
From: Jay Ford [mailto:jay-ford at uiowa.edu] 
Sent: Thursday, July 28, 2011 2:22 PM
To: Khuu, Linh Contractor
Cc: 'bind-users at lists.isc.org'
Subject: Re: Format of the IPv6 reversed zone

On Thu, 28 Jul 2011, Khuu, Linh   Contractor wrote:
> I'm new to IPv6 configuring in BIND. I need help. The forward zone is
> simple enough with AAAA record, but the reversed zone is a bit confusing to
> me.
> 
> For example, I want to add a hostname of www.example.com to
> 2001:1930:c00::2. This IPv6 address is /48.
> 
> How can I add this IPv6 address in a reversed format?
> 
> $ORIGIN 0.0.0.0.0.0.0.c.0.3.9.1.1.0.0.2.ip6.arpa. IN SOA xxxx.xxxx.xxxx
> 
> @ NS dnstemp1.example.com
> 
> What should I put for the PTR???
> 
> Is the reversed for IPv6 in the ip6.arpa file or IP6.int file???

It's in ip6.arpa.  The whole name for 2001:1930:c00::2 should be:
    2.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.C.0.0.3.9.1.1.0.0.2.IP6.ARPA

In your origin above you lost a "0" right of the "c".  The ":c00:" chunk is
actually ":0c00:", so the correct origin is:
    0.0.0.0.0.0.c.0.0.3.9.1.1.0.0.2.ip6.arpa
in which the PTR RR would be:
    2.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0	IN	PTR	www.example.com

________________________________________________________________________
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