Funny network performance problem

On Tue, 2003-10-21 at 01:03, Emmanuel Gravel wrote:
> I recently purchased a dual-speed full-duplex switch (TrendWare brand,
> got it relatively cheap). Decided to check the speed by transfering
> large files (more than 100MB). Linux to Windows, I get 2.4-2.8 MB/s.
> Windows to Linux, I get 0.8 MB/s at best. I've tried transfering only
> from one to the other, then full duplex transfers, and I get the same
> numbers.
>
> Now, to start with, 2.8MB/s is better than what I'd get at 10Mb/s but
> it's not quite as fast as I expected it to be. But the other side of the
> equation is pretty bad. Both cables between the computers and the switch
> are the same, they're fully molded, factory quality, I got them when I
> purchased my first (10Mb/s) hub. Network cards are Kingston KNE100TX on
> the Windows system, and Intel EtherExpress 100's for the Linux system
> (two, the Linux system is my firewall). Obviously all transfers of those
> sizes are done on the internal IP's only, and using an FTP client on
> Windows (push/pull).
>
> Does anyone know how I could trace the issue and resolve it?
----
Not a specific answer to your question but...

If the cables were purchased when you first purchased 10BaseT, then they
are likely not 'Cat 5' - considering the low cost of quality Cat 5
cables, you should probably upgrade your cables.

If these aren't Cat 5 cables, I don't know how you could expect to get
full duplex transfers.

It would also be interesting to see the line in dmesg...

eth0: Setting 100mbps full-duplex based on auto-negotiated partner
ability 45e1.i

Craig