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comcast routing issue question
- From: Jim Popovitch
- Date: Thu Nov 30 00:23:25 2006
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Question: What could cause the first trace below to succeed, but the
second trace to fail?
$ mtr 69.61.40.35
HOST: blue Loss% Snt Last Avg Best Wrst
1. 192.168.3.1 0.0% 1 4.3 4.3 4.3 4.3
2. 73.62.48.1 0.0% 1 10.6 10.6 10.6 10.6
3. 68.86.108.25 0.0% 1 11.4 11.4 11.4 11.4
4. 68.86.106.54 0.0% 1 9.8 9.8 9.8 9.8
5. 68.86.106.9 0.0% 1 20.5 20.5 20.5 20.5
6. 68.86.90.121 0.0% 1 11.3 11.3 11.3 11.3
7. 68.86.84.70 0.0% 1 27.7 27.7 27.7 27.7
8. 64.213.76.77 0.0% 1 24.5 24.5 24.5 24.5
9. 208.50.254.150 0.0% 1 39.4 39.4 39.4 39.4
10. 208.49.83.237 0.0% 1 46.6 46.6 46.6 46.6
11. 208.49.83.234 0.0% 1 40.7 40.7 40.7 40.7
12. 69.61.40.35 0.0% 1 43.9 43.9 43.9 43.9
$ mtr 69.61.40.34
HOST: blue Loss% Snt Last Avg Best Wrst
1. 192.168.3.1 0.0% 1 1.1 1.1 1.1 1.1
2. 73.62.48.1 0.0% 1 9.9 9.9 9.9 9.9
3. 68.86.108.25 0.0% 1 9.3 9.3 9.3 9.3
4. 68.86.106.54 0.0% 1 9.6 9.6 9.6 9.6
5. 68.86.106.9 0.0% 1 9.0 9.0 9.0 9.0
6. 68.86.90.121 0.0% 1 18.2 18.2 18.2 18.2
7. 68.86.84.70 0.0% 1 23.9 23.9 23.9 23.9
8. ??? 100.0 1 0.0 0.0 0.0 0.0
Taking the 69.61.40.33/28 subnet a bit further, .36 drops at 68.86.84.70
but .37 - .39 make it. .40 drops at 68.86.84.70, but .41 makes it.
Crazy.
-Jim P.
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