> io-net -dspeedo speed=100,duplex=1 -ptcpip
>
> Forces 100 Mbps, full duplex operation on the speedo driver.

Correct.  I should mention that generally speaking,
the speed and duplex command line options to the
driver create more problems than they solve.

When you force speed and duplex at one end of
the link, it's really best to force it at the 
OTHER end of the link, too.  Otherwise you're 
not sure what you're going to end up with.

Because virtually no one ever force both
ends, I found that the speed and duplex
options worked much better if the auto-
negotiation was still performed by the driver,
but with a restricted subset - namely, the one 
specified.

It's not hard for one end to guess the media
speed, but it's easy to end up with one end
full duplex and the other end half duplex
when you skip the auto-negotiation and force
the link, which isn't good.

Generally, try not to force the link with the 
speed and duplex options.  99.999% of the time, 
the auto-negotiation will do the "right thing".

--
aboyd