[outages] Cogent <---> L3 latency

Chris Stone cstone at axint.net
Mon May 21 18:25:09 EDT 2012


Had some customers not some slow web sites and looking appears to be the
result of latency between Cogent and Level3. The
http://www.internetpulse.net/ site is also reflecting high latency at the
Cogent/Level3 connections. Seeing up and down from here in Denver:

[root at sys~]# mtr --report --report-cycles=25 --report-wide
8-25-240-45.netecin.net
HOST: sys.axint.net                             Loss%   Snt   Last   Avg 
Best  Wrst StDev
  1. edge.axint.net                              0.0%    25    0.6   0.7  
0.3   3.1   0.6
  2. fa0-2.na01.b009854-0.den01.atlas.cogentco.com  0.0%    25    0.9  
1.1   0.7   3.1   0.5
  3. vl3509.mag02.den01.atlas.cogentco.com          0.0%    25    1.6  
5.6   0.7  58.4  15.8
  4. te7-4.mpd02.den01.atlas.cogentco.com           0.0%    25  135.1 
11.0   0.6 135.1  34.4
  5. te0-4-0-2.mpd22.mci01.atlas.cogentco.com       0.0%    25   12.8  12.9 
12.6  14.8   0.5
  6. te0-3-0-6.ccr22.dfw01.atlas.cogentco.com       0.0%    25   23.5  23.6 
23.2  26.1   0.6
  7. te0-0-0-0.ccr21.dfw01.atlas.cogentco.com       0.0%    25   22.9  23.3 
22.7  27.7   1.0
  8. te7-3.mpd01.dfw03.atlas.cogentco.com           8.0%    25  193.8  31.6 
23.2 193.8  35.5
  9. te-3-2.car3.Dallas1.Level3.net                 4.0%    25  144.8  65.8 
46.6 228.5  44.5
 10. vlan70.csw2.Dallas1.Level3.net                32.0%    25  147.5 151.4
147.5 159.6   4.4
 11. ae-72-72.ebr2.Dallas1.Level3.net              24.0%    25  147.5 147.7
147.3 148.3   0.3
 12. ae-2-2.ebr1.Denver1.Level3.net                36.0%    25  149.5 150.3
146.2 159.3   4.2
 13. ae-12-51.car2.Denver1.Level3.net               0.0%    25   46.0  79.9 
45.9 237.3  58.0
 14. EASTERN-COL.car2.Denver1.Level3.net            0.0%    25   47.4  47.4 
47.1  48.2   0.3
 15. 8-25-240-45.netecin.net                       32.0%    25  158.4 154.4
152.1 158.4   1.9

[root at sys~]# mtr --report --report-cycles=25 --report-wide
8-25-240-45.netecin.net
HOST: sys.axint.net                             Loss%   Snt   Last   Avg 
Best  Wrst StDev
  1. edge.axint.net                              0.0%    25    0.6   0.6  
0.4   1.5   0.2
  2. fa0-2.na01.b009854-0.den01.atlas.cogentco.com  0.0%    25    0.9  
1.0   0.7   1.4   0.2
  3. vl3509.mag02.den01.atlas.cogentco.com          0.0%    25   67.0  
6.0   0.6  67.0  17.6
  4. te7-4.mpd02.den01.atlas.cogentco.com           0.0%    25  139.0 
32.7   0.8 173.3  55.2
  5. te0-4-0-2.mpd22.mci01.atlas.cogentco.com       0.0%    25   12.8  13.0 
12.4  15.5   0.6
  6. te0-3-0-6.ccr22.dfw01.atlas.cogentco.com       0.0%    25   23.4  23.8 
23.2  25.1   0.5
  7. te0-0-0-0.ccr21.dfw01.atlas.cogentco.com       0.0%    25   22.9  23.0 
22.6  24.5   0.4
  8. te7-3.mpd01.dfw03.atlas.cogentco.com           8.0%    25   28.7  84.7 
23.2 368.1  94.9
  9. te-3-2.car3.Dallas1.Level3.net                 0.0%    25   23.4  28.3 
23.2 116.9  19.1
 10. vlan70.csw2.Dallas1.Level3.net                 0.0%    25   29.8  26.7 
23.2  34.9   4.3
 11. ae-72-72.ebr2.Dallas1.Level3.net               0.0%    25   23.6  23.9 
23.5  25.9   0.5
 12. ae-2-2.ebr1.Denver1.Level3.net                 0.0%    25   38.0  41.4 
37.4  50.1   4.5
 13. ae-12-51.car2.Denver1.Level3.net               0.0%    25   37.8  68.3 
37.5 229.7  58.8
 14. EASTERN-COL.car2.Denver1.Level3.net            0.0%    25   38.4  38.9 
38.4  40.3   0.5
 15. 8-25-240-45.netecin.net                        0.0%    25   49.1  47.4 
44.3  51.9   2.1

Anyone hear of anything? (waiting to hear from Cogent)


Chris

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