Re: [v6tc] Issue 1: Could we live with UDP encapsulation always on?

On Fri, 2004-12-17 at 01:52 -0800, Alain Durand wrote:
> Obviously the first thing to consider is the UDP overhead. When the 
> payload is large,there isn't much difference, but when it is small, there is a non 
> negligible impact.
> 
> Another point to consider is that UDP encapsulation might force packets
> to go to the slow path on the tunnel end-point unless special code is 
> added
> in the forwarding plane.
> 
> Also, IPv6/UDP/IPv4 has not generally been implemented so far, so we 
> have a deployment problem.

Not implemented or deployed? I wonder why Freenet6 has their special NAT
traversal code and why SixXS have AYIYA then ;)

> Also, tons of PCs have now teredo, so there may 
> be some compatibility issues and/or some potential code to leverage.

Teredo basically is one of the main three (are there others?) versions
of IPv6/UDP/IPv4 protocol. The only thing being that it is more a p2p
like application in that it not uses a pre-configured or out-of-band
managed designated server. It is possible to configure that though (it
is something like: netsh set teredo <relay>...)

Byte-wise you could easily 'live' with UDP encaps btw. Especially as
proto-41 is non-authenticated and very spoof sensitive, oh hmm so is the
protocol which is proposed in the new draft. AYIYA, which looks somewhat
quite like the proposed protocol, does not have this issue btw...
With people downloading movies etc, do 3 bytes per packet extra hurt?
The target is getting IPv6 deployed and available to the masses
(Longhorn in 2006 will come default with IPv6 and you can turn of
IPv4 ;) Who does this or how does not really matter as long as it is
done and people can enjoy the freedom of enough addresses and thus
end-2-end connectivity.

Why is there a checksum in that newly proposed protocol anyway?
There was a reason why checksumming was removed from the IPv6 headers ;)

Greets,
 Jeroen

PS: The mailinglist archives don't work...

Re: [v6tc] Issue 1: Could we live with UDP encapsulation always on?

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