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Date:      Tue, 16 Oct 2001 08:41:43 -0500
From:      Raymon Gentry <rgentry@aecc.com>
To:        "'freebsd-questions@FreeBSD.ORG'" <freebsd-questions@FreeBSD.ORG>
Subject:   FreeBSD success and ponderings???
Message-ID:  <13909109FC93D111853100A0C99AF44C048194C9@GUMBY>

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I used FreeBSD 4.4 release on a Toshiba laptop (75Mhz) to troubleshoot a
network problem we were having at on of our Hydro electric power plants.  We
have been experiencing network slowdown and data loss in the past.  I
installed the 4.4 release along with Ethereal and bing on my testing laptop
the night before I went to the plant.  

Running Ethereal I found a normal type of communication - not any excessive
arping - nothing packet storming so I turned to bing.  We use a 56k leased
line that I suspected of having some attenuation problems at first.  I used
bing (yes bing not ping) to measure the available bandwidth across the 56k
leased line but couldn't communicate with the remote router.  I tried to
ping the remote router with no success. .  All the windows machines could
ping across the 56k line but my BSD box couldn't (strange) , While
eliminating the possibilities of hardware problems on my end - I found a hub
that was attenuating the signal (packet) strength.  I replaced the hub and
the system started working properly.  I then used bing to measure the
throughput of the 56k line and it met exceptionally well with slightly over
56k. (I know that there are other tools that would be a better test - but
bing can be used from one location and its results are adequate)


Now my question - Why would the windows box see the "weakened" packets but
my BSD box would not?  - anybody?

In this case it was a good thing for diagnostic purposes


Thanks

RG

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