Can you identify those vendors which didn't react to a RFC from 3 years ago?

No that is up to those vendors product managers etc. What I know is from interoperability testing and cannot reveal. You missed mine and Bill's entire point. No one is against doing this it is a matter getting it into the production DNS code base. I think Bill should answer your other questions as you integrated my mail with Bill's. Your complaining here in IETF at least is irrelevant. And not the purpose of the IETF list IMO. I will not respond to other mail. If you want to discuss offline send me mail and I suggest you copy Bill. Ipv6.arpa is supported in the latest BIND releases and IMO all should be doing it, but I don't attribute it to being lazy at all. Again IPv6 is production code now vendors can't just change it as we do the public domain and university code base, it requires QA et al per the customer and that has cost and all changes to IPv6 at this point. /jim