[6bone] 6to4 or 6bone direct(ish)

[Tim Chown]

6to4 is nice when the other site you speak to also uses 6to4, but when you
want to connect to non-6to4 sites you may have problems depending on the
availability and location of 6to4 relays.   Very few 6to4 relays are 
made publicly available, though many ISPs support them for their own users.

In that light, a tunnel broker is more predictable, but then if you want
to reach a 6to4 site your TB ISP will need good 6to4 (relay) connectivity :)

I penned some tunnelling thoughts in
http://www.ietf.org/internet-drafts/draft-chown-v6ops-unmanaged-connectivity-00.txt

I need to update this with architecture notes (like 6to4 to 6to4 being easy
but 6to4 to non-6to4 often not being so... and similarly for Teredo)

Tim

On Fri, Feb 20, 2004 at 05:26:41PM +0100, Pim van Pelt wrote:
> | At this stage of IPv6 roll out which is the best way for users without 
> | native IPv6 providing ISPs to use IPv6?
> Use tunneling.
> 
> | In the past I have tunneled from the router to my nearest broker (BT Exact) 
> | but that was a pain because the tunnel would time out and then I'd have to 
> | set another one up which gives a different IP address...
> This is not a problem with tunnelbrokerage in itself, it's a problem
> with the implementation at BT Exact. There's plenty of brokers out there
> which will never expire a tunnel. You may want to check up on
> www.sixxs.net and use the Kewlio broker (in London).
> 
> | So recently I set the router to be a 6to4 gateway. This appears to work 
> | really well. My only concern is that it was too easy. Should things this 
> | easy to setup be the most efficient?
> Well it works well if you have a 6to4 router close to your box; You'll
> send traffic to 192.88.99.1 and it will take care of IPv6 routing for
> you. 
> 
> In terms of efficiency people are not yet agreeing on things; I find the
> asymmetric IPv4 path of 6to4 traffic annoying. As an operator of a 6to4
> public relay, I am also not quite content with the way things are, but
> that's a different story.
> 
> Bottom line: I'd use configured tunnels if possible, and 6to4 only if
> normal tunneling is not an option.
> 
> -- 
> ---------- - -    - - -+- - -    - - ----------
> Pim van Pelt                 Email: pim at ipng.nl
> http://www.ipng.nl/             IPv6 Deployment
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