World IPv6 Launch, June 6th 2012
jared at puck.nether.net
Wed Jan 18 14:54:25 CET 2012
On Jan 18, 2012, at 8:47 AM, Bernhard Schmidt wrote:
> Me too
> Routing is a bit weird, the website CNAMEs to a1448.dscb.akamai.net.
> Depending on the akamai.net server I query I get different sets of
> nameservers for dscb.akamai.net, a[0-7].dscb.akamai.net and
> n[0-7].dscb.akamai.net. The a*-servers consistently send me across the
> atlantic, the n*-servers would send me to Frankfurt. Which would be
> almost as good as IPv4, but my resolvers consistently choose the
> north-american route.
> But it's usable, thanks to Akamai for doing the switch!
I suspect that the various CDNs don't have quite the intelligence built
into the systems for the IPv6 localization. I figure this is due to their
smaller sample size of IPv6 performance data as well as the fact you can
have a large prefix covering a broad swath of space. I know carriers
with a single block covering all of their ARIN space it would be hard to
localize queries to east/west/north/south regions.
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