Re: Opportunistic Tunneling

[itojun@iijlab.net]

>TSP requires that ISPs set up tunnel servers and tunnel brokers.  
>6to4 and Teredo don't.  (Teredo server doesn't pass through traffic so
>a couple may be enough.)  6to4 works automatically between other 6to4
>nodes; TSP does not.  Teredo works automatically between Teredo nodes
>after the server has been contacted to get the public IPv6 address.

	6to4 requires 6to4 relay routers to be present on the internet,
	otherwise 6to4 won't work (or return route will be very inefficient).
	teredo requires teredo servers/relays to be present on the internet,
	otherwise teredo client won't work.

	i don't see significant difference between 6to4/teredo and TSP.

itojun