[167302] in North American Network Operators' Group

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Cogent & Level 3 routing issue?

daemon@ATHENA.MIT.EDU (Matthew Crocker)
Sat Dec 7 15:14:33 2013

From: Matthew Crocker <matthew@corp.crocker.com>
Date: Sat, 7 Dec 2013 15:14:17 -0500
To: nanog <nanog@nanog.org>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org


Anyone seeing issues between Cogent & Level3 in NYC?

I have Sprint & Cogent for bandwidth.   Everything has been humming =
along for a couple years just fine.   Yesterday around 8:00AM my BGP =
session with Cogent flapped.  Now, when my Cogent BGP is up I get 100% =
packet loss in level3 land.  When Cogent BGP is down (i.e. I=92m running =
solely on Sprint)  Everything is fine.

I have an open ticket with Cogent.  They say they have a =91capacity =
issue=92 with level3 that has been escalated to executive levels.

With Sprint & Cogent BGP UP
 I see traceroutes showing traffic leaving me on Sprint but returning on =
Cogent (and failing at level3).  I=92m guessing it is the level3/cogent =
border

With Sprint UP & Cogent Down
 I see trace routes showing traffic on to/from on Sprint just fine.


Anyone else having issues?

-Matt

--
Matthew S. Crocker
President
Crocker Communications, Inc.
PO BOX 710
Greenfield, MA 01302-0710

E: matthew@crocker.com
P: (413) 746-2760
F: (413) 746-3704
W: http://www.crocker.com





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