[184384] in North American Network Operators' Group
Re: /27 the new /24
daemon@ATHENA.MIT.EDU (Suresh Ramasubramanian)
Fri Oct 2 13:10:02 2015
X-Original-To: nanog@nanog.org
From: Suresh Ramasubramanian <ops.lists@gmail.com>
Date: Fri, 2 Oct 2015 22:27:53 +0530
In-Reply-To: <CAP-guGWv1waCLzqy6ii6ydo+FV63gzpJ3+d+_YwKwrotijFrQg@mail.gmail.com>
To: William Herrin <bill@herrin.us>
Cc: NANOG <nanog@nanog.org>
Errors-To: nanog-bounces@nanog.org
There would be a default route sure - but the filter simply means that if yo=
ur packets from say a src IP in a level 3 /24 (where the minimum alloc size w=
as what, /20) wouldn't go through if you sent them though say a cogent inter=
face
--srs
> On 02-Oct-2015, at 10:04 PM, William Herrin <bill@herrin.us> wrote:
>=20
> On Fri, Oct 2, 2015 at 11:55 AM, Suresh Ramasubramanian
> <ops.lists@gmail.com> wrote:
>> Besides which more than one provider filters by a minimum prefix length
>> per /8 - wasn't Swisscom or someone similar doing that? So multi
>> homing with even a /24 is somewhat patchy in terms of effectiveness
>=20
> Hi Suresh,
>=20
> That hasn't been true for something like a decade. Anybody who filters
> anything shorter than /24 without also taking a default route (or the
> equivalent) is not fully connected to the Internet.
>=20
> Regards,
> Bill Herrin
>=20
>=20
>=20
> --=20
> William Herrin ................ herrin@dirtside.com bill@herrin.us
> Owner, Dirtside Systems ......... Web: <http://www.dirtside.com/>
