11 Feb
2004
11 Feb
'04
4:11 p.m.
[itojun]
i understand some implementation (BIND 9.3?) does this,
i think it's all bind9, but certainly all bind 9.2 and later.
but is the behavior documented somewhere in the set of RFCs?
yes. marka just quoted all of that.
for instance, does djbdns do it? does MS DNS server do it?
i'm very skeptical about the possibility (or reality) of DNAME-based transition.
as a practical matter, it is impossible to ensure that all name servers and resolvers understand DNAME. but it is very possible to ensure that a given zone, such as "8.f.4.0.1.0.0.2.ip6.arpa" in ISC's case, is only served by authority servers who understand DNAME and do CNAME synthesis. therefore it is very practical to consider a DNAME-based transition.