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fuqnbastard
n00b
Joined: 13 Apr 2004
Posts: 46
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 Posted: Tue Jan 25, 2005 2:36 am Post subject: somebody please explain this strange ping behaviour to me... |
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I just plain don't know what to make of this. Ping shows good pings, but sometimes not immediately. Either, after some time I get a whole buch of ping output for the missing time, or the listing continues with the next output later, but not without missing a icmp_seq number. This usually means that during the pause times, my internet connection is unusable and I have to wait browsing.
What does this mean? Is this a driver problem or are there certain network situations where such a behaviour occurs? Thanks for your help! |
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hecatomb
Guru
Joined: 02 Sep 2004
Posts: 525
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| Posted: Tue Jan 25, 2005 7:32 am Post subject: |
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Hi!
How is your network made up? Are you connected with a modem
or DSL or behind a router?
If you have a small network sharing the internet connection over a hub
it's possible that the ping hangs because of collusions!
Regards,
hecatomb |
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fuqnbastard
n00b
Joined: 13 Apr 2004
Posts: 46
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| Posted: Tue Jan 25, 2005 9:43 am Post subject: |
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| I'm connected directly to a broadband modem which serves as a kind of one-client switch. Is there a way I can see whether some kind of low-level-protocol-problem like packet collisions exists? |
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hecatomb
Guru
Joined: 02 Sep 2004
Posts: 525
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| Posted: Tue Jan 25, 2005 3:08 pm Post subject: |
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Hi!
| Quote: | | I'm connected directly to a broadband modem which serves as a kind of one-client switch. |
"one-client" and "switch" are clear...
So I guess we can exclude the possibility of collusions!
| Quote: | | Is there a way I can see whether some kind of low-level-protocol-problem like packet collisions exists? |
Collusions are before any protocol. As far as I know there exists no tool
to monitor such things because the hardware (NIC) handles this on its own.
Some HUBs have a "collusion LED".
Let's give it a shot on the software side. Try knoppix, connect to the internet and watch your ping.
Or you can change some hardware (cable, NIC, modem).
Regards,
hecatomb |
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fuqnbastard
n00b
Joined: 13 Apr 2004
Posts: 46
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| Posted: Thu Jan 27, 2005 10:33 am Post subject: |
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hmm ... I think it got something to do with my modem. I replugged it and now everything seems to work.
Perhaps I'll come around and take a look at the ping code ... and/or write a python wrapper script to capture those irregularities in ping output. |
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