Transfer speed between machines on LAN

Steve Flynn anothermindbomb at
Thu Dec 4 16:02:18 UTC 2008

On Thu, Dec 4, 2008 at 3:53 PM, Dotan Cohen <dotancohen at> wrote:
> I have two computer connected via Level 1 router on a LAN. I find that
> when I transfer files between them I only get about 5 MB / sec. What
> could be the cause of this slow speed? I have tried different cables,
> but that made no improvement. Could the router be at fault? One
> machine is a laptop so I cannot replace the ethernet card, and the
> second is a desktop that I have tired with another ethernet card and
> got the same speeds. What should I start checking?

Can you connect the two machines back to back with a crossover cable.
Does the speed improve?

Check both nics to ensure that they are negotiating the fastest
possible connection between the two boxes, full duplex.

Do you have any hubs or switches in your network?

Your router - it CAN support 1Gb connections can't it and both your
laptop and desktop also have 1Gb NICS in them? The network will fall
back to the slowest device in the chain, so finding out what speeds
are supported by each of the pieces of hardware in the chain will give
you an indication of what you can expect from the network performance.

When one person suffers from a delusion it is insanity. When many
people suffer from a delusion it is called religion.

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