On Jul 28, 2011, at 11:41 PM, Michel Py wrote:
IMHO, the only valid stats we can gather are either from a large content
provider (which is why Lorenzo's numbers are so interesting) or from a
large eyeball ISP. Cisco, Juniper, Apple, the academia, the IETF, etc
are NOT valid places to collect data.
I think all of the numbers are interesting, but the numbers shouldn't be
separated from the conditions under which they were collected.
It's reasonable to say "Google is now seeing X% 6to4 traffic" or "My native v6
enterprise network is seeing Y% 6to4 traffic." What's not reasonable is to
say that observations under one set of conditions are indicative of the whole
network. Even observations made at several points by a large transit carrier
might not be indicative of conditions on the other side of the world.
It's also dubious to extrapolate from a few data points and call it a long term
trend, because we're in a very early phase of v6 deployment (and v4
exhaustion), and there are many factors which could have a large but
unpredictable influence on future use of IPv4 vs IPv6.
Ietf mailing list