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[NANOG] Comcast Routing Issues

  • From: Gary T. Giesen
  • Date: Fri Apr 25 16:10:55 2008 
Anyone from Comcast (or anyone know anyone from Comcast) that can
contact me regarding a routing issue on their network? I'm seeing some
weird routing between a customer of mine and a /32 on our network.

Traceroutes from customer site to two adjacent /32's on our network


Working /32

 1  *  *  *
  2 68.85.179.153 8 msec 8 msec 12 msec
  3 68.85.176.169 8 msec 8 msec 8 msec
  4 68.87.231.113 12 msec 12 msec 12 msec
  5 68.86.90.170 24 msec 24 msec 28 msec
  6 68.86.90.169 32 msec 36 msec 32 msec
  7 68.86.85.26 40 msec 48 msec 40 msec
  8 68.86.85.70 56 msec 56 msec 56 msec
  9 62.156.128.117 56 msec 64 msec 56 msec
 10 62.154.5.214 124 msec 136 msec 76 msec
...


Broken /32

  1  *  *  *
  2 68.85.179.153 12 msec 8 msec 12 msec
  3 68.85.176.169 8 msec 8 msec 12 msec
  4 68.87.230.234 16 msec 16 msec 24 msec
  5 68.86.90.54 12 msec 16 msec 16 msec
  6 68.86.90.53 40 msec 44 msec 36 msec
  7 68.86.85.101 68 msec 68 msec 56 msec
  8  *  *  *
  9  *  *  *
 10  *  *  *
...

Regards,

GG

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