(forwarding a mail from Fred Baker that didn't get through to the list)
Begin forwarded message:
From: Fred Baker <[email protected]>
Date: April 27, 2010 10:55:10 AM GMT+01:00
To: Lars Eggert <[email protected]>
Cc: [email protected], [email protected], [email protected], tsvwg
list <[email protected]>, Lloyd Wood <[email protected]>, Michael
Welzl <[email protected]>
Subject: Re: UDP encaps for SCTP and SCCP
From my perspective, I would prefer to run a native encapsulation
rather than host it in UDP. If one wants a UDP encapsulation, I
have no opinion on which of the choices to make, but I would
suggest a characteristic you want to have. There is no point having
UDP ports *and* SCTP/DCCP ports, and no point in having a UDP
checksum *and* an SCTP checksum. I would recommend removing the
duplicated functions from the interior protocol and relying on
UDP's counterpart, even if it is inferior, as it will be more
readily deployed.
On Apr 27, 2010, at 10:42 AM, Michael Welzl wrote:
Hi,
Okay, I herewith speak up: yes I want to see UDP encapsulation for
both these protocols
(but right now I'm not sure which one).
Both SCTP and DCCP are useful - if there was no consensus on that,
ever, these
groups would never have been formed, and the protocols would never
have
been developed.
Now, they are not used much (on the Internet involving NATs); at
least
DCCP isn't. That's a problem. UDP encapsulation is a way to try to
solve this problem - and saying that we shouldn't do this because
the
protocols aren't used is a bit stupid, isn't it?
To repeat this more clearly and bluntly:
tool X isn't working well => noone uses it.
So let's not fix tool X because noone uses it anyway.
Hmmm...
Cheers,
Michael
On Apr 27, 2010, at 9:47 AM, Lars Eggert wrote:
Hi,
please keep this discussion focused on which approach we should
follow for UDP-encapsulating DCCP and SCTP.
I'm happy Lloyd posted his views. I'm hoping other community
members will speak up as well. If I were asked to characterize
current consensus, I'd probably say "disinterest for either
approach." (Which would be fine, but doesn't quite match the
earlier feeling I got from the community, i.e., that we do want
UDP encaps for these protocols.)
Lars
http://www.ipinc.net/IPv4.GIF
http://www.ipinc.net/IPv4.GIF
