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Old 11-09-2005, 03:07 AM   #1
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switch connected to the linux board hangs up

i use embedded linux.
switch hungs up after transmitting data from board (uClinux 2.14.19 kernel, realtek 8201 PHY) to PC using ftp.
i have to off and on switch to make it functional again.
is any body knew something about this problem?
thank you.
Old 11-10-2005, 03:38 AM   #2
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Welcome to LQ!

I've had this problem when playing with an embended system with uclinux 2.4.
I had a 3com switch which sometimes stopped working. I did look for the problem, I tried with an other switch (the exact same model, but a different part number, newer) and the problem disappeared. It was the only problematic switch out of 10. Maybe you're PHY is loosing link or a duplex problem?? Electrical problem??? I did not dig into the problem as changing the switch solved it.
Still this problematic switch seemed to work well with PC.

So I can just tell you that it happened to me... maybe borrow someone else's switch or hub.

Last edited by nx5000; 11-10-2005 at 03:39 AM.
Old 11-10-2005, 04:09 AM   #3
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Thank you for answer.
well. it is something like methaphisycal problem. My switch works with PC great.
Therefore packets from embedded system is worster than from PC. I can't understand it.
I need to ensure that it is hardware problem.
if it is not - that is my (programmer) problem.
(it is very bad practice to remove own problems to someone else)
I still asking for help.


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