The problem is solved! With this e-mail I want to do things:
1. Thank you guys:
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People in this list have been great! I got long e-mails with suggestions, and
ideas and I know people spent their precious time trying to help. Too many
people offered help to thank everybody personally here, so I am sending a
general thanks to everybody. THANKS!
2. The solution:
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In case it will benefit some other adventurer in the future here a brief
description of the problem and the solution. I had a home LAN consisting of 2
linux boxes. Box-1 was the server, having 2 NICs, one connected to the ISP and
the other to linux Box-2 via a hub. Everything in this setup was 100-baseT.
Both machines could see each other and the world, but transfer rates were slow.
Ftp from server (Box-1) to client (Box-2) would get a file from Box-2 to Box-1
with transfer rates of 100Kb/sec. Putting a file from server (Box-1) to client
(Box-2) it would give 10Kb/sec. Both rates quite slow. But the problem was
clearly asymmetric.
Solution: the NIC on the server seeing the LAN was 3COM 3c905. The NIC on the
client was a LinkSys 100/10 Tx. Following the suggestion of several people I
used the 3Com configuration program (running under DOS) to switch FULL-DUPLEX
off in the 3c905. This helped somewhat. The rates went up from 100Kb/sec and
10Kb/sec to 400Kb/sec and 70Kb/sec, but clearly remained still too low. What
really fixed the problem was switching the two cards. That is, I moved the
LinkSys from the client (Box-2) to the server (Box-1) and put in its place the
3c905. Now I get around 7MB/Sec both ways. I am still not sure why the location
of the cards was important. The only suggestion I have is that the LinkSys card
is completely auto-configurable and may be this complete "auto" stuff is not
working properly in all aspects.
Thanks again -- Stavros
--
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Stavros C. Kassinos | [EMAIL PROTECTED] |
| Office: (650)-723-0546 |
Center for Turbulence Research | Fax: (650)-723-4548 |
Stanford University | www.stanford.edu/~kassinos |
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