Date: Mon, 20 Aug 2007 16:11:44 -0400 From: Mike Tancsa <mike@sentex.net> Sender: owner-nanog@merit.edu
At 03:54 PM 8/20/2007, Dan Armstrong wrote:
We're going crazy up here, I'm trying to nail down where exactly the problem is - We don't use Cogent anywhere, but we're having terrible problems with Bell and many sites in Europe...
Bell uses Cogent in a large way. The second traceroute was from an IP in their AS (577) out. I am prepending out Cogent, but Bell does everything it can not to use Teleglobe so I am having problems influencing their routes to come back that way. They also have a very odd path out of Chicago. This is from a site in Toronto (source IP in AS577) back to me peering with Cogent's router in Toronto... Toronto, Chicago, Kansas, Texas, Washington, Boston, Albany, Toronto. Thats quite the milk run. Usually its Toronto, Chicago, Toronto.
Almost certainly the fiber cut of last night. Still down after >19 hours. Not a pretty picture for those lacking diversity between Chicago and points east. -- R. Kevin Oberman, Network Engineer Energy Sciences Network (ESnet) Ernest O. Lawrence Berkeley National Laboratory (Berkeley Lab) E-mail: oberman@es.net Phone: +1 510 486-8634 Key fingerprint:059B 2DDF 031C 9BA3 14A4 EADA 927D EBB3 987B 3751