AS 701 problems in Chicago ?

Mike Tancsa mike at sentex.net
Tue Oct 17 02:32:19 UTC 2006


Anyone know whats up ? I have seen some strange routing depending on 
the payload's protocol to a site in one of their colos in Toronto.

e.g. all tcp packets are making to the host

marble# traceroute -s 199.212.134.2 -Ptcp ITMsite.sentex.ca
traceroute to ITMsite.sentex.ca (209.167.35.xx), 64 hops max, 56 byte packets
  1  iolite4-fxp2 (199.212.134.10)  0.124 ms  0.101 ms  0.097 ms
  2  allstream-vl108 (67.43.129.246)  5.663 ms  5.443 ms  5.580 ms
  3  216.191.68.65 (216.191.68.65)  6.997 ms  6.050 ms  6.667 ms
  4  65.195.241.149 (65.195.241.149)  17.438 ms  17.448 ms  18.513 ms
  5  0.so-1-0-0.XL2.CHI1.ALTER.NET (152.63.70.70)  18.040 ms  17.950 
ms  18.198 ms
  6  0.so-0-0-0.TL2.CHI2.ALTER.NET (152.63.68.89)  18.476 ms  18.442 
ms  20.224 ms
  7  0.so-6-0-0.TL2.TOR2.ALTER.NET (152.63.0.201)  38.112 ms  34.369 
ms  34.827 ms
  8  0.so-1-0-0.XL2.TOR2.ALTER.NET (152.63.3.90)  37.353 ms  37.305 
ms  36.856 ms
  9  POS7-0.GW4.TOR2.ALTER.NET (152.63.131.141)  40.099 ms  36.807 
ms  35.595 ms
10  enoo3-gw.customer.alter.net (205.150.100.214)  43.112 ms  41.565 
ms  41.931 ms
^C

But other protocols (UDP, ICMP and most importantly for us, ESP) are hosed.


marble# traceroute -s 199.212.134.2 -Pesp ITMsite.sentex.ca
traceroute to ITMsite.sentex.ca (209.167.35.xx), 64 hops max, 40 byte packets
  1  iolite4-fxp2 (199.212.134.10)  0.120 ms  0.097 ms  0.093 ms
  2  allstream-vl108 (67.43.129.246)  5.460 ms  5.303 ms  5.524 ms
  3  216.191.68.65 (216.191.68.65)  6.563 ms  6.289 ms  6.211 ms
  4  65.195.241.149 (65.195.241.149)  18.219 ms  17.612 ms  17.991 ms
  5  0.so-1-0-0.XL2.CHI1.ALTER.NET (152.63.70.70)  17.587 ms  17.629 
ms  18.492 ms
  6  0.so-0-0-0.TL2.CHI4.ALTER.NET (152.63.13.34)  26.075 ms  18.130 
ms  18.879 ms
  7  0.so-0-0-0.XL2.CHI4.ALTER.NET (152.63.13.33)  17.981 ms  18.160 
ms  18.516 ms
  8  0.so-0-0-0.TL2.CHI4.ALTER.NET (152.63.13.34)  19.138 ms  18.356 
ms  18.593 ms
  9  0.so-0-0-0.XL2.CHI4.ALTER.NET (152.63.13.33)  18.677 ms  18.477 
ms  17.973 ms
10  0.so-0-0-0.TL2.CHI4.ALTER.NET (152.63.13.34)  19.088 ms  18.936 
ms  18.692 ms
11  0.so-0-0-0.XL2.CHI4.ALTER.NET (152.63.13.33)  18.841 ms  18.308 
ms  18.996 ms
12  0.so-0-0-0.TL2.CHI4.ALTER.NET (152.63.13.34)  18.362 ms  18.645 
ms  18.584 ms
13  0.so-0-0-0.XL2.CHI4.ALTER.NET (152.63.13.33)  18.329 ms  18.125 
ms  18.890 ms
14  0.so-0-0-0.TL2.CHI4.ALTER.NET (152.63.13.34)  18.583 ms  18.635 
ms  18.933 ms
15  0.so-0-0-0.XL2.CHI4.ALTER.NET (152.63.13.33)  46.420 ms  19.088 
ms  18.217 ms
16  0.so-0-0-0.TL2.CHI4.ALTER.NET (152.63.13.34)  62.137 ms  18.515 
ms  18.349 ms
17  0.so-0-0-0.XL2.CHI4.ALTER.NET (152.63.13.33)  18.243 ms  18.558 
ms  18.404 ms
18  0.so-0-0-0.TL2.CHI4.ALTER.NET (152.63.13.34)  18.506 ms  18.568 
ms  19.341 ms
19  0.so-0-0-0.XL2.CHI4.ALTER.NET (152.63.13.33)  18.724 ms  19.178 
ms  18.367 ms
20  0.so-0-0-0.TL2.CHI4.ALTER.NET (152.63.13.34)  18.644 ms  18.321 
ms  18.545 ms
21  0.so-0-0-0.XL2.CHI4.ALTER.NET (152.63.13.33)  19.225 ms  18.410 
ms  18.596 ms
22  0.so-0-0-0.TL2.CHI4.ALTER.NET (152.63.13.34)  18.758 ms  20.040 
ms  18.488 ms

         ---Mike

--------------------------------------------------------------------
Mike Tancsa,                                      tel +1 519 651 3400
Sentex Communications,                            mike at sentex.net
Providing Internet since 1994                    www.sentex.net
Cambridge, Ontario Canada                         www.sentex.net/mike




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