[109092] in North American Network Operators' Group
AT&T routing issue
daemon@ATHENA.MIT.EDU (Campbell, Alex)
Tue Nov 4 18:20:46 2008
Date: Wed, 5 Nov 2008 10:20:36 +1100
From: "Campbell, Alex" <Alex.Campbell@ogilvy.com.au>
To: <nanog@nanog.org>
Errors-To: nanog-bounces@nanog.org
Hi all,
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We have recently brought up some BGP sessions with a new provider, and
have found that we can get end to end connectivity through the new
provider to pretty much everywhere except networks behind AT&T (AS7018).
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We are able to see our routes in AT&T's route server, but all
traceroutes from our network to hosts behind 7018 stop at AT&T's border.
We are multihomed, so I've local-prefed up our secondary ISP and the
problem resolves immediately.
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Our upstream (AS9443) and their upstream (AS11867) have been chasing
this up with AT&T for a couple of days, but don't seem to have had made
much progress.
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Does anyone have any suggestions as to what could be causing this, or a
contact at AT&T who might be able to assist?
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Thanks,
=20
Alex
