Great outage of 1997 - Does anyone recall?

Gadi Evron ge at linuxbox.org
Sun Feb 22 01:57:44 CST 2009


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
>




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