[colug-432] DNS delays for IPv6

[Rick Troth]

Can someone lend me a clue stick?  (Or perhaps just slap me with it.)

I got a new cable modem.  Since that time, I've had degrading internet access.
To be specific, service went from intermittent extremes (all there, or
nothing there) to slower and slower.
IMPORTANT COINCIDENCE:  The new hardware was installed (by a TWC tech)
on June 7, one day after "World IPv6 Launch".  So I cannot tell for
sure if the problem is with the new hardware or is because of a change
in the network.

The most obvious symptom is slow loading web pages.  Most other
services (XMPP, IMAP, SSH, PING, so on) seem to be working fine.
Google has it worst, but other sites too.  Direct 'wget' of some files
has been immediate, once the hostname resolved.

Two experiments suggest that it is #1 related to IPv6 and #2 related
to DNS.  Of note, I disabled the IPv6 address on my daughter's machine
and it immediately got better.  (No details, just her report.)  Since
Google was/is a big hurt, I collected the IPv4 addresses for a number
of its hosts and hard-coded them in /etc/hosts and here too got
immediate relief.

I cannot find news or articles or reports of similar experience.
(Certainly possible that it's just me.)  My home network has an IPv6
/48 routed over a SixXS tunnel which has worked well for more than a
year.

I run my own 'named', forwarding to the servers provided by the ISP
(TWC/RR).  I don't see delays with 'nslookup'.  But when a given web
page is "slow", the behavior is as if it were resolving fetchable
objects in the page.

-- R;   <><
'::1, not-so-sweet ::1'