[arch-general] forcing speed/duplex on Intel e1000 driver

[Snarkout]

On Sunday 06 January 2008, Chuck Remes wrote:
> A service provider has forced all of their switch ports to 100/full. I
> need to do the same on a box running archlinux x86_64 w/kernel 2.6.22-
> ARCH and the Intel e1000 driver.
>
> I edited /etc/modprobe.conf to contain these lines:
>
> e1000 Speed=100,100,100,100
> e1000 Duplex=2,2,2,2
>
> However, the messages in /var/log/kernel.log indicate the interfaces
> are still coming up as 100/half which implies they are still
> attempting to autonegotiate and failing therefore defaulting to 100
> (which can be sensed) and half-duplex (which can't be sensed, so this
> is the default).
>
> What's the best way to force the driver into 100/full on boot?

I think you want this in modprobe.conf:

alias eth0 e1000
options e1000 Speed=100 Duplex=2

This works for me, but you can check it with ethtool afterwards.