[196130] in North American Network Operators' Group
Re: RFC 1918 network range choices
daemon@ATHENA.MIT.EDU (William Herrin)
Fri Oct 6 03:32:54 2017
X-Original-To: nanog@nanog.org
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In-Reply-To: <zarafa.59d66ca3.70b6.6af482150405c159@mail01.showmeisp.net>
From: William Herrin <bill@herrin.us>
Date: Thu, 5 Oct 2017 19:14:46 -0400
To: Jerry Cloe <jerry@jtcloe.net>
Cc: North American Network Operators' Group <nanog@nanog.org>
Errors-To: nanog-bounces@nanog.org
On Thu, Oct 5, 2017 at 1:32 PM, Jerry Cloe <jerry@jtcloe.net> wrote:
> Several years ago I remember seeing a mathematical justification for it,
> and I remember thinking at the time it made a lot of sense, but now I can't
> find it.
>
Hi Jerry,
If there's special ASIC-friendly math here, beyond what was later
generalized with CIDR, it's not obvious.
10.0: 0000 1010 0000 0000
172.16: 1010 1100 0001 0000
172.31: 1010 1100 0001 1111
192.168: 1100 0000 1010 1000
AFAIK, it was simply one range each from classes A, B and C.
Regards,
Bill Herrin
--
William Herrin ................ herrin@dirtside.com bill@herrin.us
Dirtside Systems ......... Web: <http://www.dirtside.com/>
