[181112] in North American Network Operators' Group
Re: Anycast provider for SMTP?
daemon@ATHENA.MIT.EDU (Owen DeLong)
Tue Jun 16 16:50:50 2015
X-Original-To: nanog@nanog.org
From: Owen DeLong <owen@delong.com>
In-Reply-To: <55807DC3.6090702@necom830.hpcl.titech.ac.jp>
Date: Tue, 16 Jun 2015 13:45:02 -0700
To: Masataka Ohta <mohta@necom830.hpcl.titech.ac.jp>
Cc: nanog@nanog.org
Errors-To: nanog-bounces@nanog.org
> On Jun 16, 2015, at 12:49 , Masataka Ohta =
<mohta@necom830.hpcl.titech.ac.jp> wrote:
>=20
> William Herrin wrote:
>=20
>> If you read what Joe wrote, he doesn't currently have an AS number or
>> employ BGP with his Internet providers. Extrapolate for his IPv4
>> assignment situation and the /24 announcement barrier. In an
>> IPv4-depleted world, he won't be doing anycast any time soon, even if
>> it was a sound plan.
>=20
> Anyone having /24 can start hosting business with 255*N anycast =
servers.
>=20
> Masataka Ohta
I don=E2=80=99t think that=E2=80=99s quite true=E2=80=A6 I think you =
will find that 254*N is probably the best theoretical Max with just a =
/24 and that more likely, you=E2=80=99ll need some hosts on that subnet =
that don=E2=80=99t necessarily provide anycast services bringing the =
practical limit somewhat lower. Of course, if you have what you need to =
do 255, you can probably actually do 256.
Owen
