From: Pandu Poluan <pandu@poluan.info>
To: gentoo-user@lists.gentoo.org
Subject: Re: [gentoo-user] Somewhat OT: Any truth to this mess?
Date: Sun, 19 Feb 2012 02:02:51 +0700 [thread overview]
Message-ID: <CAA2qdGVskmWWEiyemcTNomEWQ1qJ-82yP9314O_4wXPVHdJ9FQ@mail.gmail.com> (raw)
In-Reply-To: <CA+czFiDkgYRFneDPmNEAnfC3VDfHm1+hFMFX4u=-RjLq9V_E=w@mail.gmail.com>
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On Feb 19, 2012 1:15 AM, "Michael Mol" <mikemol@gmail.com> wrote:
>
> (Sorry for the top-post...I'm mobile atm.)
>
> My understanding is that core network operators filter ASs for which they
don't have a contract for transit. I.e, if I were to get my own PI space,
I'd have to pay tier 1 networks (or pay someone to ride on *their*
contract) for a contract to have packets destined for my AS to be able to
reach me across their network.
>
Well, yes, but it's the other way around.
It's an operator saying "I don't want traffic for $AS_LIST" or "I want
traffic only for $AS_LIST". The contents of AS_LIST is set by the operator
on the receiving side statically, based on the transit contract.
The routers, being the workhorse brutes that they are, don't waste time
checking on contracts.
So, if a neighbor router suddenly advertise it has a 1-hop distance to
*any* AS... the router will immediately begin switching packets toward that
neighbor.
Rgds,
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next prev parent reply other threads:[~2012-02-18 19:04 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-02-18 10:26 [gentoo-user] Somewhat OT: Any truth to this mess? Dale
2012-02-18 10:44 ` Alan McKinnon
2012-02-18 12:00 ` Dale
2012-02-18 12:24 ` Volker Armin Hemmann
2012-02-18 12:39 ` Dale
2012-02-18 14:40 ` Alan McKinnon
2012-02-18 15:34 ` Dale
2012-02-18 16:18 ` Michael Mol
2012-02-18 17:48 ` Dale
2012-02-18 18:01 ` Pandu Poluan
2012-02-18 18:10 ` Michael Mol
2012-02-18 19:02 ` Pandu Poluan [this message]
2012-02-18 16:21 ` Volker Armin Hemmann
2012-02-18 16:31 ` Michael Mol
2012-02-18 12:56 ` Pandu Poluan
2012-02-18 13:18 ` Dale
2012-02-18 13:49 ` Pandu Poluan
2012-02-18 14:38 ` Alan McKinnon
2012-02-19 21:08 ` [gentoo-user] " walt
2012-02-19 21:23 ` Paul Hartman
2012-02-19 22:16 ` Dale
2012-02-20 16:12 ` Todd Goodman
2012-02-20 20:49 ` Grant Edwards
2012-02-20 21:04 ` Michael Mol
2012-02-20 21:16 ` Mark Knecht
2012-02-20 21:24 ` Michael Mol
2012-02-20 21:52 ` Grant Edwards
2012-02-21 5:30 ` Paul Hartman
2012-02-18 14:30 ` [gentoo-user] " pk
2012-02-21 3:58 ` Walter Dnes
2012-02-18 14:36 ` Alan McKinnon
2012-02-18 18:11 ` Pandu Poluan
2012-02-18 18:24 ` Michael Mol
2012-02-18 19:10 ` Pandu Poluan
2012-02-18 16:35 ` Mike Edenfield
2012-02-19 21:14 ` [gentoo-user] " walt
2012-02-19 23:29 ` wdk@moriah
2012-02-20 16:37 ` Todd Goodman
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