[112266] in North American Network Operators' Group
Re: Great outage of 1997 - Does anyone recall?
daemon@ATHENA.MIT.EDU (Gadi Evron)
Sun Feb 22 03:02:06 2009
Date: Sun, 22 Feb 2009 01:57:44 -0600 (CST)
From: Gadi Evron <ge@linuxbox.org>
To: "Patrick W. Gilmore" <patrick@ianai.net>
In-Reply-To: <7268D289-F3B7-4ECD-8DEA-995B7DEEA058@ianai.net>
Cc: NANOG list <nanog@nanog.org>
Errors-To: nanog-bounces@nanog.org
What was that story with an African routes some years back, any
memories anyone? I am looking for a reference.
On Sun, 22 Feb 2009, Patrick W. Gilmore wrote:
> On Feb 22, 2009, at 1:47 AM, Randy Bush wrote:
>
>>>> Does anyone have the full story on this?
>>> <http://www.merit.edu/mail.archives/nanog/1997-04/msg00444.html>
>>
>> bottom line:
>> o do not redistribute bgp into igp
>> o do not redistribute dynamic igp into bgp
>> o filter your peers and customers
>
> And don't put all your most important infrastructure stuff (e.g. name server,
> mail server, shell host, etc.) in the first /24 of your /<shorter>
> allocation.
>
> The biggest problem with 7007 was not that it announced a bunch of prefixes.
> It is that 7007 announced _classful_ prefix (it had been filtered through
> RIP, remember?) with AS_PATH of ^7007$. This means if you had a
> 194.1.0.0/16, you saw 194.1.0.0/24 from 7007, which is more specific. Why
> this is bad is left as an exercise to the reader.
>
> And, of course, the problem persisted after the router in question was
> actually unplugged - not powered up or attached to any fibers/cables. Thank
> you Sprint for running beta code. :)
>
> --
> TTFN,
> patrick
>
