[126865] in North American Network Operators' Group
RE: Strange practices?
daemon@ATHENA.MIT.EDU (Murphy, Jay, DOH)
Mon Jun 7 18:52:46 2010
Date: Mon, 7 Jun 2010 16:52:22 -0600
In-Reply-To: <AANLkTilPY1inlEZq2V_0Nv9PK4YCBhEKFIB6WxOpEOqt@mail.gmail.com>
From: "Murphy, Jay, DOH" <Jay.Murphy@state.nm.us>
To: "Dorn Hetzel" <dhetzel@gmail.com>, "Steve Bertrand" <steve@ipv6canada.com>
Cc: nanog@nanog.org
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
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Right on...
=20
~Jay Murphy=20
IP Network Specialist
NM State Government
=20
IT Services Division
PSB - IP Network Management Center
Santa F=E9, New M=E9xico 87505=20
"We move the information that moves your world."=20
"Good engineering demands that we understand what we're doing and why, ke=
ep an open mind, and learn from experience."
"Engineering is about finding the sweet spot between what's solvable and =
what isn't."
Radia Perlman
P Please consider the environment before printing e-mail
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From: dorn@hetzel.org [mailto:dorn@hetzel.org] On Behalf Of Dorn Hetzel
Sent: Monday, June 07, 2010 4:41 PM
To: Steve Bertrand
Cc: Murphy, Jay, DOH; nanog@nanog.org
Subject: Re: Strange practices?
=20
Perhaps the providers BGP is just being fed from interface anchored stati=
c routes which will, hopefully, drop out if the customer facing interface=
goes down. Of course, this is realistic if we're talking about actual c=
ircuits like a T-1, not so much if we're talking metro ethernet or someth=
ing...
On Mon, Jun 7, 2010 at 6:38 PM, Steve Bertrand <steve@ipv6canada.com> wro=
te:
On 2010.06.07 17:59, Murphy, Jay, DOH wrote:
>
>
> "So if the enterprise loses connectivity to one of these two providers,=
does the provider without working connectivity to the enterprise have me=
chanism in place to cease originating the address space?"
>
>
>
> Yes, BGP updates.
=2E..again, I'm confused.
BGP updates from where to where? From how I understand the OP's original
question, there is no BGP.
Hence, if one of the providers is statically routing the prefix to an
interface or un-numbered as opposed to an IP address, then blackholing
can occur if IP reachability is broken, but the link-layer is not. Is
this not correct?
Steve
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