Re: IPv6 traffic stats (was: Re: Last Call: draft-irtf-asrg-dnsbl (DNS Blacklists and Whitelists))

[Danny McPherson <[e-mail]>]

On Nov 12,

> The report as presented at the RIPE meeting indeed mentions the
> possibility of undercounting. However, it appears that there is an
> undercount of several orders of magnitude.  At that point you really
> cannot claim that the report provides a perspective on Internet IPv6
> traffic as it does. It is quite reasonable to conclude that something
> went wrong with the methodology, measurements or analysis.

Nothing is wrong in the methodology and the places where
undercounting likely occurred (namely: flow types supported
by exporting routers, Teredo data channels, etc..) have been
identified.  Caveat-aware, I believe the report to be both
very quantitive and qualitative.  Furthermore, what we measured
is what the ISPs involve have visibility to, which is a critical
consideration - if you can't see it, and can't measure it, then
you certainly can't qualify it.

If you have any more *quantitative* and qualitative studies
that you can point to I and many others would be quite
interested.

> The difference between something that is barely measurable and
> something small but measurable like 0.1% is huge. Basically, 0.1% on
> the scale of the Internet means that a very large group of people is
> using IPv6 today. There is no question that that group pales to the
> total number of Internet users but it sure is more than a few people
> in IETF experimenting with IPv6.


That's great news, and I look forwarding to seeing more
data from this large group of people...

To be clear, our attempt with this study was to measure
observable IPv6 traffic in production networks across a
large number of production ISP networks.  It was not to
discredit IPv6 in any way, quite the contrary.

I look forward to any credible data that you can provide
to support wider adoption, or being made aware of any
unacknowledged issues with our methodology.

-danny

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