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Re: What Is Causing This Failure

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  • Stan Hoeppner
    ... Try: traceroute -N 1 198.186.193.20 Debian 5.0.3 traceroute defaults to 16 simultaneous probes. Other OSes may bulk up as well. I initially had the same
    Message 1 of 17 , Dec 1, 2009
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      Carlos Williams put forth on 12/1/2009 10:05 AM:
      > On Tue, Dec 1, 2009 at 10:43 AM, Ralf Hildebrandt
      > <Ralf.Hildebrandt@...> wrote:
      >> What is the output of traceroute 198.186.193.20 ?
      >
      > I get no results from my mail server:
      >
      > traceroute to 198.186.193.20 (198.186.193.20), 30 hops max, 40 byte packets
      > 1 * * *
      > 2 * * *
      > 3 * * *
      > 4 * * *
      > 5 * * *
      > .
      > .
      > .
      > 29 * * *
      > 30 * * *
      >
      > Strange...

      Try:

      traceroute -N 1 198.186.193.20

      Debian 5.0.3 traceroute defaults to 16 simultaneous probes. Other OSes
      may bulk up as well. I initially had the same problem as you. Using -N
      1 sends one probe at a time, and works for me:

      greer:/etc/postfix# traceroute 198.186.193.20
      traceroute to 198.186.193.20 (198.186.193.20), 30 hops max, 40 byte packets
      1 . (192.168.100.1) 0.880 ms 1.143 ms 1.388 ms
      2 mo-65-41-216-193.sta.embarqhsd.net (65.41.216.193) 36.706 ms
      38.327 ms 40.772 ms
      3 mo-69-68-110-209.sta.embarqhsd.net (69.68.110.209) 42.654 ms
      45.076 ms 47.070 ms
      4 (206.51.71.197) 80.981 ms 83.123 ms 84.785 ms
      5 bb-dllstx37-jx9-02-xe-11-1-0.core.centurytel.net (206.51.69.25)
      87.971 ms * *
      6 * * *
      7 * * *
      8 * * *
      9 * * *
      10 * * *
      11 * * *
      12 * * *
      13 * * *
      14 * * *
      15 * * *
      16 * * *
      17 * * *
      18 * * *
      19 * * *
      20 * * *
      21 * * *
      22 * * *
      23 * * *
      24 * * *
      25 * * *
      26 * * *
      27 * * *
      28 * * *
      29 * * *
      30 * * *

      greer:/etc/postfix# traceroute -N 1 198.186.193.20
      traceroute to 198.186.193.20 (198.186.193.20), 30 hops max, 40 byte packets
      1 . (192.168.100.1) 0.503 ms 0.502 ms 0.463 ms
      2 mo-65-41-216-193.sta.embarqhsd.net (65.41.216.193) 38.047 ms
      35.821 ms 35.869 ms
      3 mo-69-68-110-209.sta.embarqhsd.net (69.68.110.209) 35.522 ms
      35.837 ms 35.682 ms
      4 (206.51.71.197) 67.361 ms 66.997 ms 67.789 ms
      5 bb-dllstx37-jx9-02-xe-11-1-0.core.centurytel.net (206.51.69.25)
      68.497 ms 68.432 ms 67.764 ms
      6 bb-dllstx37-jx9-01-ae0.core.centurytel.net (206.51.69.57) 67.016 ms
      66.762 ms 72.675 ms
      7 * * *
      8 po3-30g.ar1.dfw1.us.nlayer.net (69.31.63.154) 69.074 ms 69.489 ms
      69.022 ms
      9 te4-1.ar1.iah1.us.nlayer.net (69.22.142.113) 73.907 ms 73.942 ms
      74.405 ms
      10 xe-2-2-0.cr1.atl1.us.nlayer.net (69.22.142.118) 73.474 ms 73.845
      ms 74.193 ms
      11 xe-0-1-0.cr2.iad1.us.nlayer.net (69.22.142.106) 79.535 ms 80.066
      ms 80.077 ms
      12 vl72.ar1.iad1.us.nlayer.net (69.31.31.158) 79.094 ms 80.838 ms
      79.838 ms
      13 as6450.vl134.ar1.iad1.us.nlayer.net (69.31.31.115) 79.145 ms
      81.074 ms 80.578 ms
      14 dns5.docforge.org (198.186.193.20) 80.306 ms !X 80.124 ms !X
      81.516 ms !X

      man traceroute

      -N squeries

      Specifies the number of probe packets sent out simultaneously.
      Sending several probes concurrently can speed up traceroute
      considerably. The default value is 16. Note that some routers and hosts
      can use ICMP rate throttling. In such a situation specifying too large
      number can lead to loss of some responses.

      --
      Stan
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