www6 ?

[Petra Zeidler]

Thus wrote Doug Barton (dougb at dougbarton.us):

> I've read this thread with interest, but I am still curious, what
> problem are you trying to solve here? Is this something you want for
> diagnostic purposes, for end user purposes, other?

A mixture, really. Take f.e. ftp.netbsd.org:
ftp.netbsd.org has address 204.152.184.36
ftp.netbsd.org has IPv6 address 2001:4f8:1:c:230:48ff:fe31:43f2

there also is:
ftp4.netbsd.org has address 204.152.184.36
(and no AAAA)
and
ftp6.netbsd.org has IPv6 address 2001:4f8:1:c:230:48ff:fe31:43f2
(and no A)

there's sufficient people that have some IPv6 connectivity, but it sucks
badly, so they want to make sure they connect via v4 (because their hosts
tend to prefer v6 if it's working at all), so they use the ftp4 variant.

In other cases, they have a special deal for IPv6 traffic, so they only want
to connect via v6 (or fail if it's not working), and use ftp6.

The majority doesn't care and uses ftp.

Also, in some cases people are reporting strange connection problems
and then get asked to use the 4 and 6 variants separately to find out
if their problem is protocol dependent.

Is that sufficient explanation-by-example of why one would want to have
distinct names for the A and AAAA addresses of a dual-stacked host,
in addition to its general one?

regards,
	Petra Zeidler
-- 
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