IPv6 Wow

Mikael Abrahamsson swmike at swm.pp.se
Mon Oct 13 06:24:07 UTC 2008

On Sun, 12 Oct 2008, Daniel Senie wrote:

> I do wonder whether where the Vista machines on public IPs really are. I 
> also have to wonder if performance is really better when those users are 
> routed over 6to4 in Europe from, say California, or whether they'd 
> actually get better performance if they stuck in a NAT box, resulting in 
> their using IPv4 instead?

I'd say it's very rare where IPv6 will give you better performance than 
IPv4 right now.

Regarding where they are, I'd say all over the place. It's very common in 
my regional market to hand out one or more public IPs, and if the customer 
doesn't put their own NAT box there, then their Vista computer(s) will 
have public IPs and will use 6to4.

Regarding 6to4 or Teredo, I've done some testing of my own and the 
statelessness of 6to4 makes it avoid some of the session setup/NAT 
travesal magic of Teredo that slows Teredo down. I'd much rather see the 
NAT boxes do 6to4 and run native on their local LAN segment, than having 
end hosts do Teredo to get thru the NAT. It'll give the end user a better 
IPv6 experience.

Mikael Abrahamsson    email: swmike at swm.pp.se

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