North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical Re: comcast routing issue question
On Thu, 2006-11-30 at 00:06 -0500, Jim Popovitch wrote: > 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. Btw, the problem has now been resolved, however I'm still curious as to what scenario could have caused that. -Jim P.
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