D. J. Bernstein wrote: <SNIP> > (1) NS records for which the parent node is in the zone, > (2) A records that those NS records point to, > (3) AAAA records that those NS records point to, or > (4) A6 records that those NS records point to. <SNIP> > What happens if the IETF adds another address type beyond A/AAAA/A6? > Answer: a zone administrator who adds a record of that type causes a > complete zone-transfer failure with older versions of BIND 9. This is > even worse than the situation in http://cr.yp.to/djbdns/newtypes.html, > because it kills the whole zone transfer, not just the new records. <SNIP> > Nobody would fall for > it if the document imposed rules relating to silly > experiments like A6. Lots of snipps, just to remind you that A6 has been moved to experimental and that you won't find it in 99.9999% of current actively deployed systems. Check http://cr.yp.to/djbdns/killa6.html which you wrote some time ago :) Greets, Jeroen