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Date:      Tue, 6 Oct 1998 16:32:46 -0700 (PDT)
From:      Tom <tom@uniserve.com>
To:        Kris Kennaway <kkennawa@physics.adelaide.edu.au>
Cc:        current@FreeBSD.ORG
Subject:   Re: Improper sharing of modem bandwidth
Message-ID:  <Pine.BSF.4.02A.9810061630560.9788-100000@shell.uniserve.ca>
In-Reply-To: <Pine.OSF.4.03.9810070120160.32491-100000@mercury.physics.adelaide.edu.au>

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On Wed, 7 Oct 1998, Kris Kennaway wrote:

> initiate a file download it tends to consume all available modem bandwidth, to
> the exclusion of all other things like open telnet sessions. Once the download

> This is the source of the recent comment I made here re binary transfers
> coming through at a faster rate than usual (1.7k, which is probably the
> absolute limit for my modem when you include protocol overhead).

  I suspect that your system is negotiating a very large TCP window.  This
means that a very large amount of data will queue at the other end of your
PPP link, blocking other traffic.

Tom


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