Re: der mysterioese ausreisser beim ping'en

From: Bernd Walter <ticso(at)cicely8.cicely.de>
Date: Thu, 4 Apr 2002 17:38:25 +0200

On Thu, Apr 04, 2002 at 02:31:42PM +0200, clemensF wrote:
> ich bin unendlich dankbar, dass dieses thema mal hochgekommen ist :) das
> phaenomen dieses ausreissers beobachte ich schon lange, allerdings habe ich
> noch nie daran gedacht, es anderswo als bei mir mal richtig auszuprobieren.
>
> 0 p1 root #ping www.heise.de
> PING www.heise.de (193.99.144.71): 56 data bytes
> 64 bytes from 193.99.144.71: icmp_seq=0 ttl=248 time=69.826 ms
> 64 bytes from 193.99.144.71: icmp_seq=1 ttl=248 time=69.753 ms
> 64 bytes from 193.99.144.71: icmp_seq=2 ttl=248 time=70.034 ms
> 64 bytes from 193.99.144.71: icmp_seq=3 ttl=248 time=70.335 ms
> 64 bytes from 193.99.144.71: icmp_seq=4 ttl=248 time=71.760 ms
> 64 bytes from 193.99.144.71: icmp_seq=5 ttl=248 time=69.888 ms
> 64 bytes from 193.99.144.71: icmp_seq=6 ttl=248 time=69.084 ms
> 64 bytes from 193.99.144.71: icmp_seq=7 ttl=248 time=72.060 ms
> 64 bytes from 193.99.144.71: icmp_seq=8 ttl=248 time=69.539 ms
> 64 bytes from 193.99.144.71: icmp_seq=9 ttl=248 time=69.358 ms
> 64 bytes from 193.99.144.71: icmp_seq=10 ttl=248 time=70.811 ms
> 64 bytes from 193.99.144.71: icmp_seq=11 ttl=248 time=71.078 ms
> 64 bytes from 193.99.144.71: icmp_seq=12 ttl=248 time=1080.103 ms
> 64 bytes from 193.99.144.71: icmp_seq=13 ttl=248 time=78.363 ms
> 64 bytes from 193.99.144.71: icmp_seq=14 ttl=248 time=70.368 ms
> 64 bytes from 193.99.144.71: icmp_seq=15 ttl=248 time=71.798 ms
> [...]
>
> 0 p1 root #ping www.tu-berlin.de
> PING httpvh1.zrz.tu-berlin.de (130.149.4.10): 56 data bytes
> [...]
> ^C
> --- httpvh1.zrz.tu-berlin.de ping statistics ---
> 21 packets transmitted, 21 packets received, 0% packet loss
> round-trip min/avg/max/stddev = 68.746/118.162/1078.039/214.638 ms
>
> das ist reproduzierbar. mein rechner ist ein oller i386'er fbsd-4.3 mit
> a-dsl anschlurf der t-o??line gesellschaft auf aktien, ich benutze bloss
> user-ppp und:

Und mit einer -current ist das nicht reproduzierbar:
[133]cicely5> ping www.heise.de
PING www.heise.de (193.99.144.71): 56 data bytes
64 bytes from 193.99.144.71: icmp_seq=0 ttl=247 time=258.954 ms
64 bytes from 193.99.144.71: icmp_seq=1 ttl=247 time=281.568 ms
64 bytes from 193.99.144.71: icmp_seq=2 ttl=247 time=324.013 ms
64 bytes from 193.99.144.71: icmp_seq=3 ttl=247 time=821.377 ms
64 bytes from 193.99.144.71: icmp_seq=4 ttl=247 time=267.578 ms
64 bytes from 193.99.144.71: icmp_seq=5 ttl=247 time=358.799 ms
64 bytes from 193.99.144.71: icmp_seq=6 ttl=247 time=68.342 ms
64 bytes from 193.99.144.71: icmp_seq=7 ttl=247 time=174.963 ms
64 bytes from 193.99.144.71: icmp_seq=8 ttl=247 time=208.566 ms
64 bytes from 193.99.144.71: icmp_seq=9 ttl=247 time=177.948 ms
64 bytes from 193.99.144.71: icmp_seq=10 ttl=247 time=67.108 ms
64 bytes from 193.99.144.71: icmp_seq=11 ttl=247 time=156.980 ms
64 bytes from 193.99.144.71: icmp_seq=12 ttl=247 time=369.041 ms
64 bytes from 193.99.144.71: icmp_seq=13 ttl=247 time=522.014 ms
64 bytes from 193.99.144.71: icmp_seq=14 ttl=247 time=350.666 ms
64 bytes from 193.99.144.71: icmp_seq=15 ttl=247 time=723.807 ms
64 bytes from 193.99.144.71: icmp_seq=16 ttl=247 time=503.717 ms
64 bytes from 193.99.144.71: icmp_seq=17 ttl=247 time=224.088 ms
64 bytes from 193.99.144.71: icmp_seq=18 ttl=247 time=341.887 ms
64 bytes from 193.99.144.71: icmp_seq=19 ttl=247 time=170.263 ms
64 bytes from 193.99.144.71: icmp_seq=20 ttl=247 time=81.571 ms
64 bytes from 193.99.144.71: icmp_seq=21 ttl=247 time=112.042 ms
64 bytes from 193.99.144.71: icmp_seq=22 ttl=247 time=325.529 ms
64 bytes from 193.99.144.71: icmp_seq=23 ttl=247 time=552.985 ms
64 bytes from 193.99.144.71: icmp_seq=24 ttl=247 time=372.810 ms
64 bytes from 193.99.144.71: icmp_seq=25 ttl=247 time=75.477 ms
64 bytes from 193.99.144.71: icmp_seq=26 ttl=247 time=132.943 ms
64 bytes from 193.99.144.71: icmp_seq=27 ttl=247 time=311.844 ms

Die Zeiten sind zwar teilweise hoch, aber da zieht auch noch ein
E-Donkey die Leitung zu.

Ohne E-Donkey sieht das so aus:
[135]cicely5> ping www.heise.de
PING www.heise.de (193.99.144.71): 56 data bytes
64 bytes from 193.99.144.71: icmp_seq=0 ttl=247 time=67.924 ms
64 bytes from 193.99.144.71: icmp_seq=1 ttl=247 time=72.658 ms
64 bytes from 193.99.144.71: icmp_seq=2 ttl=247 time=68.630 ms
64 bytes from 193.99.144.71: icmp_seq=3 ttl=247 time=69.617 ms
64 bytes from 193.99.144.71: icmp_seq=4 ttl=247 time=69.849 ms
64 bytes from 193.99.144.71: icmp_seq=5 ttl=247 time=84.287 ms
64 bytes from 193.99.144.71: icmp_seq=6 ttl=247 time=82.138 ms
64 bytes from 193.99.144.71: icmp_seq=7 ttl=247 time=114.384 ms
64 bytes from 193.99.144.71: icmp_seq=8 ttl=247 time=69.523 ms
64 bytes from 193.99.144.71: icmp_seq=9 ttl=247 time=68.992 ms
64 bytes from 193.99.144.71: icmp_seq=10 ttl=247 time=68.167 ms
64 bytes from 193.99.144.71: icmp_seq=11 ttl=247 time=67.891 ms
64 bytes from 193.99.144.71: icmp_seq=12 ttl=247 time=69.488 ms
64 bytes from 193.99.144.71: icmp_seq=13 ttl=247 time=69.716 ms
64 bytes from 193.99.144.71: icmp_seq=14 ttl=247 time=67.824 ms
64 bytes from 193.99.144.71: icmp_seq=15 ttl=247 time=69.264 ms
64 bytes from 193.99.144.71: icmp_seq=16 ttl=247 time=68.175 ms
64 bytes from 193.99.144.71: icmp_seq=17 ttl=247 time=69.370 ms
64 bytes from 193.99.144.71: icmp_seq=18 ttl=247 time=68.673 ms
64 bytes from 193.99.144.71: icmp_seq=19 ttl=247 time=84.223 ms
64 bytes from 193.99.144.71: icmp_seq=20 ttl=247 time=67.766 ms
64 bytes from 193.99.144.71: icmp_seq=21 ttl=247 time=71.505 ms
64 bytes from 193.99.144.71: icmp_seq=22 ttl=247 time=75.067 ms
64 bytes from 193.99.144.71: icmp_seq=23 ttl=247 time=77.039 ms
64 bytes from 193.99.144.71: icmp_seq=24 ttl=247 time=69.175 ms
64 bytes from 193.99.144.71: icmp_seq=25 ttl=247 time=67.438 ms
64 bytes from 193.99.144.71: icmp_seq=26 ttl=247 time=68.933 ms
64 bytes from 193.99.144.71: icmp_seq=27 ttl=247 time=66.148 ms

Mit 4.x konnte ich einige Phänomene in der Richtung auf den
unterschiedlichsten Systemen sehen die mit einer -current weg sind.

-- 
B.Walter              COSMO-Project         http://www.cosmo-project.de
ticso(at)cicely.de         Usergroup           info(at)cosmo-project.de
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Received on Thu 04 Apr 2002 - 17:40:55 CEST

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