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Article #59092

Re: Linux and internet access speeds

#59092
From: Dave Fitch
Date: Fri, 22 Mar 1996 00:00
34 lines
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johns@rd.scitec.com.au (John Saunders) writes:
>Dave Fitch <davidf@syd.csa.com.au> wrote:
>> Last Wednesday evening (~6pm) I ftp'ed several files from ANU's
>> sunsite mirror (as announced here a couple of days ago, thanks!).
>> I was fairly consistently getting 3.2 Kbytes/sec as reported by
>> ftp when it finished getting each file.  What sort of rates do
>> other people get??
>
>That's about the best you will get with a 28.8K modem link. The theoretical
>maximum is 28800/8 = 3600 = 3.5K but there is TCP/IP overhead in each packet
>to the tune of 40 bytes. Also PPP adds a few bytes to the packet. You might
>be able to squeeze a tad more speed by upping the mtu and mru (assuming it's
>set less than 1500 at the moment) but don't expect miracles.

Oh (thanks).
The mtu is set to 296, I changed it from 1500 to see what'd happen
after I read somewhere (in the dip manpage?) that a smaller value
was often better.

What's mru??

Is it worth setting the port speed to 115200 (or something higher than
38400)??  Does this actually have any affect??  (as it's an internal
modem, so not using the serial port)

Dave.
-- 
_______________________________________________________________________
|                             .                                       |
| Rev. David Fitch        _--_|\  "I am minuspeptic, frasmotic, even  |
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| Ph  : +61 2 9901 1413  \_.--._/  such perricabobulations."          |
| Fax : +61 2 9901 1616        v   E. Blackadder to Dr Samuel Johnson |
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From: davidf@syd.csa.com.au (Dave Fitch)
Subject: Re: Linux and internet access speeds
Date: 1996/03/22
Message-ID: <Don75y.5o5@assip.csasyd.oz>
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