Re: IPV4 to IPv6 migration

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David Conrad wrote:
[..]
> It's a bit sad that we didn't take the opportunity to define a new API =
=20
> that would return 'network handles'

SCTP & HIP. Please look at these.

IP is just for sending packets from A to B.

TCP was (afaik, as I am far from old enough ;) created just to send=20
packets to two hosts as long as they can talk to each other. UDP the=20
same. At that time nobody renumbered as as one just got a /8 and=20
expected never to do this.

SCTP was created to avoid all those problems during renumbering as the=20
hosts can notify each other where they are going to (and other cool=20
features).

HIP was created just to avoid the whole debacle completely from the=20
start, using HIP's instead of IP's.


Now the big problem is, how do you get programmers to start adding SCTP=20
and/or HIP support to all their programs... Apache/IIS/Lighttpd don't=20
support SCTP, and Firefox/Safari/IE don't support it either. That is the =

first step to take. But like IPv6, they are adding something new, and=20
that might cause issues and delays when trying to use those protocols,=20
thus they most likely rather not. Also, especially in the case of HTTP,=20
the connections are shortlived and load-balancer work fine already with=20
TCP/HTTP, those and a lot of other gear also needs to start supporting=20
SCTP/HTTP then all of a sudden. Like IPv6 this is another nice=20
chicken/egg issue. One advantage here is that you just have to touch the =

endhosts and not the routing infrastructure.


Oh and indeed before you ask SCTP and/or HIP solve a part of the=20
multihoming riddle too. They just don't solve the "I need this traffic=20
to go this fast and there and here" and other such tricks.

Greets,
  Jeroen


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