IPv6 Wow

Carlos Friacas cfriacas at fccn.pt
Mon Oct 13 07:06:17 UTC 2008

On Mon, 13 Oct 2008, Mikael Abrahamsson wrote:

> 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.

Rare = Absolutely Yes. Impossible = No :-)

> 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.

Fully agree. Unfortunately not every NATbox/cheap-consumer-router is happy 
to pass on 6to4 packets to its next hop :-(

> -- 
> Mikael Abrahamsson    email: swmike at swm.pp.se


Carlos Friac,as                                           See:
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