v6onbydefault: Missing answers for DNS AAAA queries

[Roland Bless <bless@tm.uka.de>]

Hi,

we are using dual-stacked v6/v4 hosts now since several years in our
institute. One really annoying behavior are looong DNS timeouts when the
resolver lib asks for AAAA records, but the queried server does not
respond (not even sends back an error) and simply drops the query. Some
user even wanted to turn off v6(!) because he found it so annoying to wait
for his favorite news site. Mainly, a provider of commercials who embeds
his advertisements into news web sites causes the problem. Requests to
the hostmaster to correct this behavior were not answered so far.

Any suggestions how to cope with these problems? Is it covered in the 6onbydefault
draft? Is it worthwhile to be considered there?

Regards,
 Roland

P.S.: until recently the resolver lib allowed to turn off AAAA queries
by replacing the dns6 entry in the nsswitch.conf with a dns entry.