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  1. #1
    Join Date
    Jun 2004
    Posts
    523

    cogent and linx peering issue today?

    A trace from the US to the UK via cogent (and likewise the other way) shows a massive latency increase between linx > cogent in london, anyone else seeing this?

    Ev1 use cogent to get to the UK and its creating ping times of 500+
    System Administrator

  2. #2
    Join Date
    Jun 2004
    Posts
    523
    From a cogent router in london:

    trace www.plus.net
    Translating "www.plus.net"...domain server (66.28.0.45) [OK]

    Type escape sequence to abort.
    Tracing the route to portal.plus.net (212.159.8.137)

    1 g9-2.3.core01.lon02.atlas.cogentco.com (130.117.16.121) 0 msec 4 msec 0 msec
    2 linx-gw1.plus.net (195.66.224.164) 432 msec 436 msec 436 msec
    System Administrator

  3. #3
    Join Date
    Jan 2004
    Location
    North Yorkshire, UK
    Posts
    4,163
    Yup ...

    That's actually a LINX IP so I would think that's a maxed port rather than anything else.

    Code:
    Tracing route to cogentco.com [38.9.51.20]
    over a maximum of 30 hops:
    
      1     2 ms     1 ms     2 ms  1.b1c021033.adsl.uk.razorblue.com [82.163.166.66]
      2    23 ms    23 ms    25 ms  core1-fe2-0.lon.uk.razorblue.com [213.130.147.49]
      3    23 ms    23 ms    23 ms  82.163.0.30
      4   472 ms   480 ms   499 ms  195.66.224.185
      5   573 ms   535 ms   525 ms  p10-0.core01.bos01.atlas.cogentco.com [130.117.0.46]
      6   596 ms   545 ms   592 ms  p5-0.core01.jfk02.atlas.cogentco.com [66.28.4.118]
      7   378 ms   380 ms   366 ms  p4-0.core02.dca01.atlas.cogentco.com [66.28.4.81]
      8   350 ms   376 ms   303 ms  p15-0.core01.dca01.atlas.cogentco.com [66.28.4.21]
      9   370 ms   330 ms   303 ms  p2-0.ca03.iad03.atlas.cogentco.com [154.54.1.102]
     10   360 ms   420 ms   361 ms  www.cogentco.com [38.9.51.20]
    
    Trace complete.

  4. #4
    1 <10 ms <10 ms <10 ms 66.28.200.1
    2 <10 ms <10 ms <10 ms g2-1-core01.iah01.atlas.cogentco.com [38.112.241
    .93]
    3 14 ms 14 ms 14 ms p13-0.core01.mci01.atlas.cogentco.com [66.28.4.1
    06]
    4 25 ms 25 ms 26 ms p5-0.core02.ord01.atlas.cogentco.com [66.28.4.34
    ]
    5 27 ms 26 ms 25 ms p15-0.core01.ord01.atlas.cogentco.com [66.28.4.6
    1]
    6 47 ms 47 ms 46 ms p14-0.core01.bos01.atlas.cogentco.com [66.28.4.1
    09]
    7 117 ms 117 ms 117 ms p3-0.core01.lon02.atlas.cogentco.com [130.117.0.
    45]
    8 532 ms 533 ms 521 ms linx-gw1.plus.net [195.66.224.164]

    Trace complete.

  5. #5
    traceroute to 195.66.224.164 (195.66.224.164), 30 hops max, 38 byte packets
    1 64.124.159.1 (64.124.159.1) 0.648 ms 0.575 ms 0.518 ms
    2 ge-6-0-0.mpr2.iah1.us.above.net (64.124.11.1) 0.410 ms 0.541 ms 0.818 ms
    3 so-5-1-0.mpr1.atl6.us.above.net (64.125.29.61) 13.238 ms 13.278 ms 13.259 ms
    4 so-0-0-0.mpr2.atl6.us.above.net (64.125.27.50) 13.231 ms 13.405 ms 13.149 ms
    5 so-3-2-0.cr1.dca2.us.above.net (64.125.27.65) 24.280 ms 24.263 ms 24.205 ms
    6 so-6-0-0.cr1.lhr3.uk.above.net (64.125.31.185) 96.195 ms 96.145 ms 96.146 ms
    7 so-0-0-0.cr2.lhr3.uk.above.net (208.184.231.146) 96.165 ms 96.155 ms 96.109 ms
    8 pos2-0.mpr2.lhr1.uk.above.net (208.184.231.66) 96.077 ms 96.076 ms 96.017 ms
    9 pos1-0.pr1.lhr1.uk.above.net (208.184.231.74) 96.490 ms 96.146 ms 96.125 ms
    10 linx-gw1.plus.net (195.66.224.164) 97.959 ms 98.195 ms 98.993 ms

  6. #6
    Join Date
    Jun 2004
    Posts
    523
    looks like a cogent issue then
    System Administrator

  7. #7
    Might just be an issue on LINX's side of their Cogent uplink, we won't know for sure unless LINX or Cogent comments on the issue

  8. #8
    Join Date
    Jan 2002
    Location
    UK
    Posts
    1,034
    did you email ev1 and ask why they not using one of their other providers for uk traffic?
    Chris Collins
    Hostingfreak.net
    Directadmin Hosting in europe
    www.hostingfreak.net

  9. #9
    He probably has an unmetered Cogent server with EV1

  10. #10
    Join Date
    Jun 2004
    Posts
    523
    RajH, nope i dont. Im not too sure why the trace to linx.net goes over XO.net.

    The problem is still occuring so i will e-mail ev1 now.
    System Administrator

  11. #11
    Join Date
    Jun 2004
    Posts
    523
    opened as trouble ticket with ev1 #1023343.

    its hard to manage my server with 500ms+ latency.
    System Administrator

  12. #12
    Join Date
    Jan 2004
    Location
    North Yorkshire, UK
    Posts
    4,163
    To be honest you need to speak to your ISP not EV1. EV1 only have control of their egress routes, not ingress routes, so SSH wise that won't help much.

    The only thing EV1 can do is drop their Cogent BGP sessions which is very unlikely.

  13. #13
    Join Date
    Jun 2004
    Posts
    523
    I think to be honest its a problem with cogent / linx as im getting the same problem to germany over cogent going through linx.
    5 380 ms 372 ms 380 ms 195.66.226.185
    6 377 ms 386 ms 397 ms p15-0.core01.ams03.atlas.cogentco.com [130.117.1
    226]
    7 452 ms 396 ms 396 ms 130.117.0.146
    8 384 ms 386 ms 385 ms hgcomputer.demarc.cogentco.com [130.117.20.218]

    9 403 ms 424 ms 399 ms 83.141.0.234
    10 437 ms 392 ms 431 ms 194.187.16.16
    System Administrator

  14. #14
    Join Date
    May 2004
    Location
    Blue Springs, Missouri
    Posts
    366
    cogent having peering issues?

    I think this is the first time I've EVER seen anything like that.

  15. #15
    Join Date
    Dec 2001
    Location
    Toronto, Ontario, Canada
    Posts
    5,954

  16. #16
    Join Date
    Jan 2002
    Location
    UK
    Posts
    1,034
    cogent always been poor in europe although this particular problem is new, if EV1 are using bgp to pick best route then something is clearly wrong with cogent been used to europe.

  17. #17
    Join Date
    Jun 2004
    Posts
    523
    This is still occuring after 3 days, i thought it was fixed this morning however it came back again after a few hours.

    EV1 say they have not had a response from cogent as of yet regarding this issue.
    System Administrator

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