[185621] in North American Network Operators' Group
Re: CIDR Utilization
daemon@ATHENA.MIT.EDU (joel jaeggli)
Fri Oct 30 21:13:20 2015
X-Original-To: nanog@nanog.org
To: John Steve Nash <john.steve.nash@gmail.com>, nanog@nanog.org
From: joel jaeggli <joelja@bogus.com>
Date: Sat, 31 Oct 2015 10:13:13 +0900
In-Reply-To: <CA+OqHhABBFK6YQ9nQCRfOvP58maV5Kx4wj3oYPpFWrDyJDcapg@mail.gmail.com>
Errors-To: nanog-bounces@nanog.org
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most reasonable ipam tools will track or express unallocated vs
allocated space.
netdot has a lovely address-space container/block view for managing free
vs allocated space
joel
On 10/31/15 9:51 AM, John Steve Nash wrote:
> Hi,
>=20
> I'm looking for any tool or a way I could specify a CIDR and the prefix=
es
> that are being used within this CIDR and the tool show me all free
> supernets.
>=20
> Example:
>=20
> 192.168.0.0/24 - CIDR
>=20
> Used subnet's:
>=20
> 192.168.0.1/32
> 192.168.0.8/27
> 192.168.0.64/26
> 192.168.0.68/32
> 192.168.0.96/29
>=20
> Tool Result =3D> Free Subnet's:
>=20
> 192.168.0.2/31
> 192.168.0.4/30
> 192.168.0.32/27
> 192.168.0.128/25
>=20
> Regards,
>=20
> John
>=20
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