What is an AA record?
Roy.Arends at nominum.com
Mon Mar 26 18:47:05 UTC 2001
On Mon, 26 Mar 2001, Bill Manning wrote:
> % I've tried to find the answer to this in various FAQs but have been
> % unsuccessful. What is an AA record?
> YeaHa! a soapbox!.... :)
> half of a AAAA record. The AAAA record is for mapping IPv6 addresses to
> lables. There is an alternative, the A6 record. Within the IETF, there is
> a small debate ongoing as to which RR to kill off. Reasonable arguments for
> killing either exist. Some people are zelots for their particular view.
> One could construct a view that the A6 record facilitates renumbering but
> the DNS operational cost is high. (composite record synthesis is non-trival)
> And there is scant support in the installed base for A6.
> One could also construct the view that since AAAA support has been in BIND
> since 4.9.6, and renumbering is an increasingly rare event (buying into the
> NAT universe, even with IPv6) that we don't need to accept the operational
> headache of A6 and the incumbent upgrade of most of the resolvers on the
> Its a tough call. I think I'm leaning toward the increased complexity of
I thought the address space with IPv6 was large enough so that NOBODY EVER
HAS TO RENUMBER. Damn, my A6 allergie is back again. Talking 'bout a red
flag on a mad bull.
A6 is evil, I prefer AAAA.
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