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Re: network stalls on Fedora Core 3


The problem isn't limited to ssh or scp. I also tested large files using FTP and the problem existed there too in the data channel. Before I detected the problem with ssh, I had been experiencing problems with updating my system (both FC2 and FC3) using up2date. It would periodically hang. I had to continually cancel the up2date process and restart it to get uddates downloaded. I had thought the problem was due to slow FC3 mirrors. Now, I realize that this problem was due to the network stalls.

I am surprised no one else is experiencing this problem. The computer that is experiencing the problem is a stock Dell T700r (I think that is the right model number) that we bought back in 2000. It isn't new but it isn't really old either.


Tom Trebisky wrote:
On Sat, Apr 23, 2005 at 11:49:04AM -0700, Keith Fetterman wrote:

Since this problem isn't a FC3 specific problem (I also discovered the same problem in the latest Ubuntu Linux), does anyone know the best mailing list/forum to that discusses kernel 2.6 and ethernet driver issues? Maybe this problem has already been identified and workarounds suggested.

I do know that this problem is not limited to a specific ethernet card. I have the same problem with both an OEM 3com ethernet card and an Intel ethernet card. I guess its possible they are the same chip inside so they are using the same driver, but I though Intel made their own network chips.

I suspect the problem is well above the network driver level.  This is
a fundamental TCP/IP stack problem, almost certainly a botch in the TCP
code involving a retransmit timer or some such.

Actually, come to think of it I experience this issue exclusively
with ssh connections (which is the bulk of what I do from home),
which is definitely TCP.

Indeed intel has their own network chips and the 3Com has their own
silicon as well; and the drivers are totally different.
This is not a chip or driver problem.

If the kernel developers would just stop reinventing the wheel, ...
 ...  (oops, I didn't say that).

Keith Fetterman                          206-780-5670
Mariner Supply, Inc.                     kfetterman go2marine com

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