[157031] in North American Network Operators' Group
Re: IPv4 address length technical design
daemon@ATHENA.MIT.EDU (Valdis.Kletnieks@vt.edu)
Wed Oct 3 19:00:31 2012
To: Jimmy Hess <mysidia@gmail.com>
In-Reply-To: Your message of "Wed, 03 Oct 2012 17:49:56 -0500."
<CAAAwwbUPcP_CDEDSpDmu+_FA+d3JZR1tWB+FFf4y0ppzH1kk0g@mail.gmail.com>
From: Valdis.Kletnieks@vt.edu
Date: Wed, 03 Oct 2012 18:59:20 -0400
Cc: NANOG <nanog@nanog.org>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
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On Wed, 03 Oct 2012 17:49:56 -0500, Jimmy Hess said:
> (1) Stopped mixing the Host identification and the Network
> identification into the same bit field; instead every packet gets a
> source network address, destination network address, AND an
> additional tuple of Source host address, destination host
> address; residing in completely separate address spaces, with no
> "Netmasks", "Prefix lengths", or other comingling of network
> addresses and host address spaces.
Where's Noel Chiappa when you need him?
> (2) The new protocol will use variable-length address for the Host
> portion, such as used in the addresses of CLNP,
This also was considered during the IPv6 design phase, and the router
designers had a collective cow, as it makes ASIC design a whole lot more
interesting. And back then, line speed was a lot lower than it is now...
Not saying it can't be done - but you're basically going to have to do CLNP
style handling at 400Gbits or 1Tbit. Better get those ASIC designers a *lot*
of caffeine, they're gonna need it...
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