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<div class="moz-cite-prefix">On 26/03/2015 11:32 PM, Noel Butler
wrote:<br>
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<div>I run v6 at home courtesy of HE, have done for a while,
my mrtg graphs dont get above a few hundred kB a day for v6
traffic - mostly to google I dare say, hell, not even
twitter goes via 6, and IDGAF about faecesbook so no traffic
goes any direction near that hole.</div>
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And the HE tunnel will be the problem. Most applications (and in
particular web browsers) implement 'Happy Eyeballs'
(<a class="moz-txt-link-freetext" href="https://tools.ietf.org/html/rfc6555">https://tools.ietf.org/html/rfc6555</a>), and try both IPv6 & IPv4
connections at the same time, then use whichever protocol
established a connection quickest. Google, Twitter, G Maps, Yahoo,
Akamai etc are all v6-enabled - but until your IPv6 RTT is similar
to your IPv4 RTT, your apps will continue to use IPv4 in practice.
That few hundred kB a day is probably successful IPv6 connections
being established 100 ms behind the IPv4 equivalent, and then not
being used for application data.<br>
<br>
Those with native IPv6, where the RTT for both is effectively the
same, see 40 - 50% of traffic over IPv6. Or use a tunnel that
terminates locally.<br>
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If you run Firefox as your browser, the '4or6' AddOn allows you to
set the browser to disable IPv4, or to keep both but disable
fast-fallback (aka Happy Eyeballs) so it will wait for IPv6 to
timeout before trying IPv4. Turning off 'FastFallback' should help
push a lot more traffic over to IPv6 similar to how native
dual-stack would allow.<br>
<br>
Paul.<br>
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