On Sat, Apr 15, 2006 at 12:48:48PM -0400, Guillaume Filion wrote: || So please query 0.ntp-pool-test.logidac.com, || 1.ntp-pool-test.logidac.com, etc and see what NTP server you are || getting. If you know that you should be getting a closer NTP server, || please send an email to me or this list with: || 1) your IP address || 2) the IP address that you got when querying the DNS server || 3) the IP address of the NTP server that you know is closer to you. || 4) if possible, traceroutes to both (bad and good) NTP servers.
Measurements from 5 hosts to each of 0. up to 4., using traceroute -I
and times from 5 ping probes.
Hosts with hop count ">X" are probably blocking ICMP ECHO.
The 5 source hosts, all in .nl:
81.204.9.201 actual host behind ADSL router, subtract 1 from given hopcount
130.89.10.21 university shell host
194.109.21.6 well connected ISP shell host
213.84.230.57 directly connected ADSL host
217.148.172.46 well connected webserver
Only the .4 from 81.204.9.201 - giving 205.166.121.66 - is crossing
the Atlantic. Traceroute:
$traceroute 205.166.121.66
traceroute to 205.166.121.66 (205.166.121.66), 30 hops max, 40 byte packets
1 gw (10.0.0.138) 0.940 ms 0.478 ms 0.403 ms
2 195.190.249.127 (195.190.249.127) 19.147 ms 15.894 ms 9.362 ms
3 iawxsrt-dc2-bb21a.wxs.nl (213.75.1.1) 12.548 ms 13.286 ms 17.949 ms
4 gsr12416.ams.he.net (195.69.145.150) 20.055 ms 12.530 ms 13.530 ms
5 pos0-0.gsr12416.lon.he.net (216.66.24.157) 20.909 ms 21.014 ms
20.361 ms
6 pos4-1.gsr12416.nyc.he.net (216.218.200.101) 92.907 ms 91.147 ms
90.624 ms
7 pos7-0.gsr12012.sjc.he.net (216.218.254.153) 168.250 ms 167.812 ms
167.993 ms
8 pos1-2.gsr12416.fmt.he.net (64.71.128.182) 175.731 ms 176.573 ms
175.896 ms
9 pos10-0.gsr12012.fmt.he.net (66.220.20.138) 175.393 ms 174.913 ms
175.594 ms
10 Moose-20516612166.mooseriver.com (205.166.121.66) 169.238 ms 169.485
ms 169.731 ms
$
The results:
hosts------------------------- trcrt ping-[ms]----------------------
source--------- destination--- -hops min---- avg---- max---- mdev---
81.204.9.201 81.207.92.186 >4
81.204.9.201 213.10.208.72 6 21.051 21.667 22.199 0.536
81.204.9.201 62.4.94.155 10 11.755 13.100 14.185 0.860
81.204.9.201 194.151.157.5 9 17.893 18.766 19.710 0.727
81.204.9.201 205.166.121.66 10 168.503 169.570 170.240 0.869
130.89.10.21 131.174.122.206 >7
130.89.10.21 131.211.80.155 >5
130.89.10.21 145.97.220.22 5 5 5 5
130.89.10.21 137.120.89.224 8 7 264 1150
130.89.10.21 62.4.94.155 10 3 3 4
194.109.21.6 213.84.218.16 >3
194.109.21.6 213.84.251.124 4 7.955 8.689 10.671 0.999
194.109.21.6 213.84.230.57 4 13.504 15.371 19.532 2.211
194.109.21.6 213.84.187.156 5 5.812 6.286 7.046 0.456
194.109.21.6 82.92.197.115 4 7.338 14.359 35.800 10.841
213.84.230.57 213.84.218.16 >3
213.84.230.57 213.84.251.124 5 21.090 23.702 26.388 2.223
213.84.230.57 213.84.230.57 1 0.044 0.052 0.080 0.016 = me
213.84.230.57 213.84.187.156 6 19.731 22.775 25.180 2.260
213.84.230.57 82.92.197.115 5 24.447 29.150 40.067 5.740
217.148.172.46 62.4.94.155 8 2.9 4.4 9.1
217.148.172.46 194.151.157.5 8 9.6 11.3 14.1
217.148.172.46 194.88.2.88 4 2.2 2.2 2.3
217.148.172.46 194.88.2.50 4 2.1 2.9 5.8
217.148.172.46 194.88.2.60 4 2.2 2.8 4.7
Ciao. Vincent.
--
Vincent Zweije <[EMAIL PROTECTED]> | "If you're flamed in a group you
<http://www.xs4all.nl/~zweije/> | don't read, does anybody get burnt?"
[Xhost should be taken out and shot] | -- Paul Tomblin on a.s.r.
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