[AusNOG] IPv6 rDNS ReDelegation

[Elly Tawhai]

The general delegation size made in IPv6 is either a /48 or /32. There
is no built in limit within APNIC systems, which prevents delegation of
longer or shorter sizes. Noting that ip6.arpa delegations can only be
made on 4bit (nibble) hex boundaries, and we can record your NS for any
delegation size received. If a non 4bit aligned delegation (eg /23) has
been received then it would be typical to manage a pair of records to
get to the delegation boundary.

For reverse DNS delegation there is a hierarchy that has to be followed.
So once the address block has been delegated APNIC cannot delegate more
specific sub-delegates 'over' a reverse DNS delegation, or allow
sub-delegates to be delegated their more specific if the parent holder
has not delegated the parent block in reverse DNS.

Hope this helps to provide some clarity.

Kind regards,
Elly
APNIC

Skeeve Stevens wrote:
> It is not what APNIC does.  This is your job.
> 
> This is no different than if you get domain.com <http://domain.com> 
> delegated to you by a registry and you delegate blah.domain.com 
> <http://blah.domain.com> to someone else.
> 
> You manage your own sub-delegations.
> 
> 
> ...Skeeve
> 
> *Skeeve Stevens - *eintellego Networks Pty Ltd
> skeeve at eintellegonetworks.com 
> <mailto:skeeve at eintellegonetworks.com> ; www.eintellegonetworks.com 
> <http://www.eintellegonetworks.com/>
> 
> Phone: 1300 239 038; Cell +61 (0)414 753 383 ; skype://skeeve
> 
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> 
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> 
> On Thu, Dec 12, 2013 at 9:44 AM, Daniel Watson <daniel at glovine.com.au 
> <mailto:daniel at glovine.com.au>> wrote:
> 
>     Gday Noggers
> 
>     As you are most likely aware, a provider like yourself is issued
>     with a /32 IPv6 from APNIC,
> 
>     We are able to set the rDNS servers for this entire /32 to our
>     windows 2008 DNS server for PTR records,
> 
>     However I have issued one of our customers with a /40 and wish to
>     send this /40 to their rDNS server.
> 
>     I've been told by APNIC that its not possible to delegate any lower
>     then a /32 from their end, but it is possible from the DNS server to
>     push the zone further down to other sets of name servers.
> 
>     I was wondering if anybody on list has ever done this in the past,
>     and how they managed to achieve it?
> 
>     We have setup our /32 in our DNS server but now wish to send a /40
>     of the /32 to a different rDNS server
> 
>     I hope you get what i mean, and hope somebody on/off list can assist.
> 
>     TIA
> 
>     D.
> 
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