[40395] in North American Network Operators' Group
Re: Static routes in an AS vs BGP advertised routes
daemon@ATHENA.MIT.EDU (up@3.am)
Wed Aug 8 10:43:40 2001
Date: Wed, 8 Aug 2001 10:41:31 -0400 (EDT)
From: up@3.am
To: nanog@merit.edu
In-Reply-To: <B481990C9658D411BD3C009027D6F54401ACDAD5@ca-exchange3.nai.com>
Message-ID: <Pine.BSF.4.10.10108081035230.47136-100000@richard2.pil.net>
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On Wed, 8 Aug 2001, Murphy, Brennan wrote:
> Everything is going along smoothly until an asteroid crashes
> into the data center of one of your ISPs in one of the cities.
> It causes extensive damage and a certain amount of
> hysteria but to you, it means that only one of your ISPs
> can truly reach your full /19. That is, the /24 you were
> advertising in that city is now only reachable via one
> of the ISPs. But the ISP taken out by the asteroid is
> still advertising the full /19.
>
> Under the circumstances (loss of life, hysteria, sub-optimal
> routing), would it be appropriate to ask the unfortunate
> ISP to create a static route on their network to push
> traffic destined for that particular /24 over to the other
> ISP's network? This way, the /19 advertisements can
> be maintained and when traffic destined for that
> one /24 reaches the asteroid ISP, it can get passed
> over to the non-asteroid ISP. The route wouldnt be
> advertised to other carriers.....just used to make sure
> traffic reached the correct final destination.
It's not only reasonable, but not uncommon. I've never heard of an ISP
that's had an astoroid take out a POP refuse to make these accomodations.
Frankly, though, I'd try to replace them with a provider that pays a
little more attention to celestial traffic patterns.
James Smallacombe PlantageNet, Inc. CEO and Janitor
up@3.am http://3.am
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