Re: unmanaged scope comments

[Pekka Savola <pekkas@netcore.fi>]

On Fri, 20 Sep 2002, Jun-ichiro itojun Hagino wrote:
> >==> connectivity includes one very important component IMO: the quality of
> >network connections.  This is often ignored.  It's a high risk for a vendor
> >to enable IPv6 by default, for example, if that'd result in lower quality
> >connections to e.g. dual-stack web servers (a very real fact in 6bone), this
> >should be taken into consideration at least in the short term.
> 
> 	i don't understand what you want to do about it.  will you ping/ping6
> 	destination and pick shorter roundtrip?  when multiple A records
> 	are returned for www.foo.com, do you probe them to get the optimal
> 	performance?  

That's a difficult, general question to consider.  It's not easy.  I've 
said one very real possibility to *not* introduce production services in 
the same DNS names yet..

> i believe the "quality" factor does not matter, and
> 	it cannot be measured from endpoint (at least within short time).

Connection to U.S. from Europe being 400 ms (and a few packets getting
lost here and there) versus 150 ms is very measurable even without any
tools e.g. in web browsing.

-- 
Pekka Savola                 "Tell me of difficulties surmounted,
Netcore Oy                   not those you stumble over and fall"
Systems. Networks. Security.  -- Robert Jordan: A Crown of Swords