[ipv6-wg@localhost] Reverse delegation for 6bone address space in ip6.arpa

[Andrei Robachevsky <]

Dear Colleagues,

In accordance with RFC 3152, the administration of the name space within
ip6.arpa has been delegated to the RIRs. The 3FFE::/16 address space has 
not yet been allocated to the RIRs by the IANA. It is the intention that 
the RIRs administer this space. The community has expressed a need for 
3FFE reverse space to be in the ip6.arpa domain. The RIR CEOs sent a 
message to the IAB requesting a waiver regarding the RFC 3152 
requirement and received a positive response. The RIRs are prepared to 
administer e.f.f.3.ip6.arpa domain in the manner as described below.

We plan to implement it in the next few weeks and deliver the solution 
soon after the RIPE 44 Meeting in January.

Regards,

Andrei Robachevsky
CTO, RIPE NCC	


Support for reverse delegation for 6bone address space in ip6.arpa DNS tree
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Phase I. Before a final decision is made on future management of the 
3FFE address space

The delegation for e.f.f.3.ip6.arpa is made by IANA to one of the RIRs. 
Zone information for this space is produced by copying the existing 
delegations in the e.f.f.3.ip6.int zone. Additional check is done to 
ensure that the servers corresponding to the NS RR are also 
authoritative in .arpa space. Zone information is updated whenever 
changes are detected in the e.f.f.3.ip6.int zone.

This approach has a couple of advantages. It keeps the RIRs out of the 
6bone registration process until a final decision is made on future 
management of the 3FFE address space. It also implies no procedural 
changes from a user's perspective since changes are made in only one 
place, while at the same time it moves responsibility for maintaining 
the e.f.f.3.ip6.arpa zone to the RIRs. This then prepares for a smoother 
transition to Phase II.

The main constraint of this approach is that it forces registrants to 
use the same name servers for .arpa as for .int.


Phase II. Registration of 3FFE space is transferred to the RIRs

A shared zone management process will be implemented similar to that
currently implemented by the RIRs for the legacy v4 space (ERX project,
http://www.ripe.net/db/erx/). That is, holders of 6bone address space 
will be served for reverse delegation by the respective RIR in their 
region, and the generation of the e.f.f.3.ip6.arpa zone can be entirely 
automated using zone merging.