[178634] in North American Network Operators' Group
Re: Verizon Policy Statement on Net Neutrality
daemon@ATHENA.MIT.EDU (David Conrad)
Sun Mar 1 16:37:37 2015
X-Original-To: nanog@nanog.org
From: David Conrad <drc@virtualized.org>
In-Reply-To: <CC5D0883-99E8-4EAF-89B6-B0D32C23E90B@delong.com>
Date: Sun, 1 Mar 2015 16:37:34 -0500
To: Owen DeLong <owen@delong.com>
Cc: NANOG <nanog@nanog.org>
Errors-To: nanog-bounces@nanog.org
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> On Mar 1, 2015, at 4:26 PM, Owen DeLong <owen@delong.com> wrote:
>=20
>>> It was the combination of asymmetric, no or few IPs (and NAT), and
>>> bandwidth caps.
>>=20
>> let's not rewrite history here: IPv4 address scarcity has been a =
thing
>> since the very early 1990s. Otherwise why would cidr have been =
created?
>=20
> CIDR had nothing to do with address scarcity.
Untrue.
CIDR was created in response to the proliferation of "class Cs" being =
allocated instead of "class Bs". The reason class Cs were being =
allocated instead of class Bs was due to projections (I believe by Frank =
Solensky and/or Noel Chiappa) that showed we would exhaust the Class B =
pool by 1990 or somesuch. This led to the ALE (Address Lifetime =
Extensions) and CIDRD working groups that pushed for the allocation of =
blocks of class Cs instead of Class Bs.
CIDR also allowed for more appropriately sized blocks to be allocated =
instead of one-size-fits-most of class Bs. This increased address =
utilization which likely extended the life of the IPv4 free pool.
Regards,
-drc
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