Frederic Leroy wrote:
Le Wed, 25 Nov 2009 05:25:28 +0100,
Asdo <a...@shiftmail.org> a écrit :
Hi netdev and e1000 people,
I have a weird problem here.
[...]
I have the same kind of problem at home. I can't copy big files over
ssh unless I limit the rate ( ssh -l 8000 ... )
After reading your mail, I make some quick tests ( see below).
Results in short :
- netcat always work.
- ssh stalls, nearly immediately.
Good God it's true then!
I think I have an idea for why Netcat works while scp doesn't:
probably SCP pushing data requires replies from the application layer
(the 60 bytes I was telling about for SFTP) while netcat doesnt, it just
needs the Acks to keep pushing data.
Still if I am right, with Netcat you might end up with a corrupted file
on the other side (shorter). Or maybe not, depending on how exactly the
bug is made. Could you check this? Filesize and md5sum.
I think I just reproduced the bug on another machine, different hardware
(Supermicro mainboard), same Ubuntu, same kernel, same integrated Intel
network card. It just takes 5 hours or so for me to trigger.
Do you have Intel network card, with e1000e driver on SG? (see lsmod)
(sorry I was wrong before, it's e1000e in my case not e1000) Otherwise
it's probably the TCP layer...
Would you paste here your lspci and lsmod?
Thank you
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