[168981] in North American Network Operators' Group
Odd Cogentco routing?
daemon@ATHENA.MIT.EDU (David Hill)
Fri Feb 7 21:41:01 2014
Date: Fri, 07 Feb 2014 21:40:35 -0500
From: David Hill <dhill@mindcry.org>
To: nanog@nanog.org
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
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Hello -
While doing some traceroutes, I have found a few destinations that I
found a little odd. For example:
5.|-- bbr01aldlmi-bue-2.aldl.mi.charter.com 0.0% 60
152.1 47.2 8.3 367.6 66.0
6.|-- bbr01sgnwmi-bue-5.sgnw.mi.charter.com 0.0% 60
102.3 53.4 15.6 317.9 66.3
7.|-- be4041.nr21.b016069-0.dtw04.atlas.cogentco.com 0.0% 60
78.9 58.3 19.6 267.9 62.1
8.|-- te0-5-0-5.rcr21.dtw04.atlas.cogentco.com 0.0% 60
32.6 58.2 20.3 218.3 54.6
9.|-- te4-2.ccr01.tol01.atlas.cogentco.com 0.0% 60
359.6 95.2 21.4 359.6 84.5
10.|-- te0-5-0-1.ccr21.cle04.atlas.cogentco.com 0.0% 60
24.3 70.0 24.3 219.3 52.5
11.|-- te7-2.ccr01.buf02.atlas.cogentco.com 0.0% 60
29.3 89.9 28.8 245.4 66.0
12.|-- te7-2.ccr01.yhm01.atlas.cogentco.com 0.0% 60
117.6 105.0 30.6 467.8 87.7
13.|-- te0-7-0-34.ccr21.yyz02.atlas.cogentco.com 0.0% 60
167.5 65.8 32.0 316.7 51.7
14.|-- level3.yyz02.atlas.cogentco.com 15.0% 60
132.0 91.2 47.6 326.1 57.9
15.|-- ae-13-13.bar1.Toronto1.Level3.net 61.7% 60
62.4 107.9 49.5 282.7 73.0
16.|-- ae-9-9.ebr1.Chicago1.Level3.net 0.0% 60
92.4 116.8 69.6 315.0 59.2
17.|-- ae-1-100.ebr2.Chicago1.Level3.net 1.7% 60
92.3 127.7 71.2 370.1 62.1
18.|-- ae-3-3.ebr2.Atlanta2.Level3.net 0.0% 60
74.6 125.5 70.7 261.0 50.3
19.|-- ae-2-52.edge4.Atlanta2.Level3.net 0.0% 60
75.0 121.0 71.0 252.4 45.6
Detroit -> Toledo -> Cleveland -> Buffalo -> Hamilton, ON -> Toronto ->
Chicago..
Is it odd that Cogentco is routing USA traffic to Canada and handing it
off there to Level3 just to bring it back in to the USA? There is also
some packetloss at the exchange...
Thanks,
David
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