3356 leaking routes out 3549 lately?

Hank Nussbacher hank at efes.iucc.ac.il
Sat Mar 29 18:51:20 UTC 2014

At 15:42 28/03/2014 -0400, Chip Marshall wrote:

I have seen prefix leaking via AS3356 as well in the past year.


>On 2014-03-28, David Hubbard <dhubbard at dino.hostasaurus.com> sent:
> > Has anyone had issues with Level 3 leaking advertisements out their
> > Global Crossing AS3356 for customers of 3549, but not accepting the
> > traffic back?  We've been encountering this more and more recently,
> > bgpmon always detects it, and all we ever get from them is there's
> > nothing wrong.  Today it affected CloudFlare's ability to talk to us.
> > It seems to happen mostly with Europe and Asian peering points.
> > Typically lasts five to ten minutes which makes me think someone working
> > on merging the two networks is doing some 'no one will notice this'
> > changes in the middle of the night.
>I'm not sure if it's the same thing, but I've had a few alerts
>from Renesys lately seeing a path to my AS via GLBX 3549 that
>shouldn't exist, as we only have connections with Level 3 3356.
>For example, Renesys reports "x 3549 33517" where it should only
>be able to see "x 3356 33517" or maybe "x 3549 3356 33517".
>(Due to Renesys policy, I can't know what x is)
>Chip Marshall <chip at 2bithacker.net>

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