[114965] in North American Network Operators' Group
Re: Fiber cut - response in seconds?
daemon@ATHENA.MIT.EDU (Charles Wyble)
Mon Jun 1 19:59:05 2009
Date: Mon, 01 Jun 2009 16:58:21 -0700
From: Charles Wyble <charles@thewybles.com>
To: "nanog@nanog.org" <nanog@nanog.org>
In-Reply-To: <4A246902.4010705@bogus.com>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
Joel Jaeggli wrote:
>
> Charles Wyble wrote:
>>
>> Joel Jaeggli wrote:
>>> It's pretty trivial if know where all the construction projects on your
>>> path are...
>> How so? Setup OTDR traces and watch them?
>
> When you lose link on every pair in a bundle, but don't lose any of the
> buildings you're serving via diverse paths, you have a pretty good idea
> what happened. Knowing which of the three construction projects on that
> path is likely to be digging a trench is a facilities issue.
Right. So why the "near instant" response time. If it's a diverse path,
one would imagine that they could respond in a few hours or a day and
not have any impact.
The fact that they are so closely monitoring the construction and
wanting to fix it that fast seems a bit over the top for redundant systems.
>
>>> I've seen this happen on a university campus several times. no black
>>> helicopters were involved.
>> Care to expand on the methodology used? A campus network is a lot
>> different then a major metro area.
>
> Given the location the guys in the blacks suvs likely have at least
> situational awareness of all of the contruction projects in their
> immediate vicinity.
One would hope. Though given the archaic nature of many govt systems,
that could involve a lot of manual paper pulling... or are the
bid/reward/permit systems all automated on the east coast? :)
they don't have to monitor everyone's cable, just
> their own and near instantaneous response implies proximity so it may
> well be more akin to a campus network.
True.
