Hello again,
Clayton Weaver has responded this:
"Last time someone reported this problem it was late acks from Windows.
Linux would send a few packets, well within windows advertised receive
window, and wouldn't get the ack before the ttl expired. So it would
resend the first packet of the sequence, then get the ack for the
original
packets (too late). Trimming the receive window on the linux side down
to
8k fixed it. Note: linux was sending well within windows' advertised
receive window, but if the packets from linux had a 32k window, somehow
windows managed to misconfigure itself, apparently based merely on
seeing
the large receive window value in the packet header.
Another fellow discovered that windows was setting the mtu to 576 on his
connection to his linux box, while his linux machine was using 1500 for
standard ethernet.
Look at your tcp/ip settings on windows for the connection to the linux
box (gateway?). That's the most likely source of the problem."
Does anybody know how could I configure these parameters in a NT
machine?
Regards,
Cristobal
Cristobal Bonillo wrote:
>
> Hello all,
>
> I have a 100 Mb network and I have detected too many collisions when
> accessing from NT to my linux machine. When I transfer files between NT
> machines, performance is quite good. When I make a ftp connection from
> NT to linux and get files, transfer is good, but when I put files,
> transfer goes down and too many collisions occur.
>
> I have made some tests with ftp program from a NT machine.
>
> NT --> Linux (ftp PUT)
>
> (*) 10 Mb 425 MB/s
>
> (**) 100 Mb 180 MB/s
>
> Linux --> NT (ftp GET)
>
> (*) 10 Mb 1025 MB/s
>
> (**) 100 Mb 3300 - 4700 MB/s
>
> (*) I have a SMC 10/100 Switch and a 3COM 10 Hub connected to it. My NT
> ethernet card is configured in AUTO mode, so I can connect this machine
> to the hub or the switch.
>
> (**) NT ethernet card is a LongShine 10/100
> Linux ethernet card is a D-Link DFE 530 TX
>
> I have also tested NT to NT transfers. They are quite good, but I can't
> measure them. I suppose near 4000 KB/s
>
> I appreciate any help from you.
>
> Thanks,
>
> Cristobal Bonillo
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