Is an IPv6-only glue/delegation record a problem in a world of IPv4?

[Matthew Pounsett]

On 2010/01/11, at 12:57, Rick Dicaire wrote:

> If I understand this correctly, the lack of an ANSWER section for AAAA
> query would denote there is no ipv6 glue at the TLD?

No, that would indicate that the name server you queried is not authoritative for the record you queried about.  Glue, by definition, is non-authoritative data, and so appears in the ADDITIONAL section, as in the example you pasted.

By contrast, Verisign's servers have long included glue in the ANSWER section.  This is widely considered to be at best suboptimal, and by many (or most) to be a bug.  Verisign has indicated that this behaviour is coming to an end, although I don't recall off the top of my head if they've announced a date.

Matt