[188559] in North American Network Operators' Group
Re: Some doubts on large scale BGP/AS design and black hole routing
daemon@ATHENA.MIT.EDU (Hank Nussbacher)
Mon Apr 4 15:04:47 2016
X-Original-To: nanog@nanog.org
Date: Mon, 4 Apr 2016 15:04:42 -0400 (EDT)
From: Hank Nussbacher <hank@efes.iucc.ac.il>
To: Christopher Morrow <morrowc.lists@gmail.com>
In-Reply-To: <CAL9jLaYy33H297R=E6GLeBisJH1XQTnWjROYyC4jSuOcM=TDAQ@mail.gmail.com>
Cc: nanog list <nanog@nanog.org>
Errors-To: nanog-bounces@nanog.org
On Mon, 4 Apr 2016, Christopher Morrow wrote:
> =E2=80=8Bdifferent providers, different entrance facilities in the buil=
ding(s),
> different conduits out of the area... and hope that somewhere along the
> path providerA and B didn't share conduit or capacity-swap you to a sin=
gle
> path :)=E2=80=8B
>
I would suggest also different provider equipment. If one provider uses =
J=20
find your second provider that uses C.
Also don't be seduced by a provider that offers 2 disparate paths, using=20
two totally different systems. I remember years ago AT&T's ATM and FR=20
systems both died nationwide due to some equipment bug.
Also providers lie either intentionally or by mistake. If they state a=20
circuit is protected, it might be this month, but next month it may not=20
be. You may only discover this 3 years from now when the circuit dies,=20
and the provider is happy to pay the SLA penalty which is far less than=20
the 3 year cost of a protected vs a non-protected circuit.
-Hank
