IPv6 and DNS

IPv6 in DNS payload 
AAAA record: similar to A record
PTR record: use "ip6.arpa." tree

turmeric.itojun.org. IN AAAA 3ffe:507:0:1:200:86ff:fe05:80fa
a.f.0.8.5.0.e.f.f.f.6.8.0.0.2.0.1.0.0.0.0.0.0.0.7.0.5.0.e.f.f.3.ip6.arpa.
         IN PTR	turmeric.itojun.org.

IPv6 in DNS transport
BIND8 supports queries via IPv4 TCP/UDP only
BIND9 supports queries over IPv6 TCP/UDP as well