Re: IPv6 transition architecture discussion

[Pekka Savola <pekkas@netcore.fi>]

On Thu, 28 Nov 2002, Keith Moore wrote:
> > My take is that you really can't get reliably-ish v6 outside of Far East
> > areas (excluding some regions with e.g. acedemic networks and some single
> > companies).
> > 
> > That's not enough as lots of traffic does not go inside these regions.
> 
> I suspect we'll see 6to4 being used more often in regions where you can't
> (yet) get reliable v6.   The problem then becomes how to get better 
> interoperation between 6to4 and native v6.

Well, this has a few problems.

If there is no good v6 support, it's very likely that the closest 6to4 
relay is also far away, thus causing extra RTT and instability.

And in many areas you _do_ get v6 -- via a tunnel or whatever -- and it 
seems to be preferred to 6to4 (I'd agree, but only to a degree).

So a rule of thumb "bad ipv6 connectivity or none at all -- use 6to4"  
doesn't probably hold.

-- 
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