[183163] in North American Network Operators' Group
Re: Drops in Core
daemon@ATHENA.MIT.EDU (William Herrin)
Sun Aug 16 08:45:23 2015
X-Original-To: nanog@nanog.org
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In-Reply-To: <571A31DB-4295-4872-AF6F-BA4280CD39A7@ianai.net>
From: William Herrin <bill@herrin.us>
Date: Sun, 16 Aug 2015 08:44:50 -0400
To: "Patrick W. Gilmore" <patrick@ianai.net>
Cc: NANOG list <nanog@nanog.org>
Errors-To: nanog-bounces@nanog.org
On Sun, Aug 16, 2015 at 8:00 AM, Patrick W. Gilmore <patrick@ianai.net> wro=
te:
> On Aug 15, 2015, at 1:41 PM, Job Snijders <job@instituut.net> wrote:
>> On Sat, Aug 15, 2015 at 11:01:56PM +0530, Glen Kent wrote:
>
>>> Is there a paper or a presentation that discusses the drops in the core=
?
>>>
>>> If i were to break the total path into three legs -- the first, middle
>>> and the last, then are you saying that the probability of packet loss
>>> is perhaps 1/3 in each leg (because the packet passes through
>>> different IXes).
>>
>> It is unlikely packets pass through an IXP more then once.
>
> =E2=80=9CUnlikely=E2=80=9D? That=E2=80=99s putting it mildly.
>
> Unless someone is selling transit over an IX, I do not see how it
> can happen. And I would characterize transit over IXes far more
> pessimistically than =E2=80=9Cunlikely=E2=80=9D.
Hi Patrick,
I'm told it happens relatively often in networks supporting a lot of
schools. Being an unpaid pass-through for schools paying other ISPs
functions as a loss-leader that attracts more schools as customers.
Regards,
Bill Herrin
--=20
William Herrin ................ herrin@dirtside.com bill@herrin.us
Owner, Dirtside Systems ......... Web: <http://www.dirtside.com/>
