On 2014-02-26 06:12, Prasant J wrote:
>
> On Wed, Feb 26, 2014 at 5:59 PM, Prasant J <[email protected]
> <mailto:[email protected]>> wrote:
>
>
>
> On Wed, Feb 26, 2014 at 5:37 PM, Gary Thomas <[email protected]
> <mailto:[email protected]>> wrote:
>
> On 2014-02-26 05:03, Prasant J wrote:
> > Hi,
> >
> > I'm using linux-3.0.35 on my custom hardware (uses imx6 quad) based
> on sabresd platform. I'm using yocto root filesystem (this is a soft float
> build).
> >
> > I want to force my system to use 100 mbps ethernet speed even if
> the network supports 1000 mbps link. How can I enable this ?
> >
> > My custom hardware uses Micrel's Gigabit Ethernet PHY KSZ9021RNI.
> >
> > I can change the network speed (by ssh-ing into the linux system)
> using:
> > ethtool -s eth0 autoneg off speed 100
> > but I want network speed of 100 mbps when network is initialized
> during startup.
> >
> > Any inputs will be of help.
>
> If you are using init-ifupdown to manage the network, you can
> change /etc/network/interfaces to look something like this:
>
> auto eth0
> iface eth0 inet dhcp
> pre-up ethtool -s eth0 speed 100 duplex full autoneg off
>
>
> Hi Gary,
>
> That will help.
> I guess the same will work when I configure staticip by modifying the
> /etc/network/interfaces file.
>
> I will try this one. Thanks once again!
>
>
> This did not work :(
>
> This is from the serial log:
>
> Configuring network interfaces... Cannot get current device settings: No such
> device
> not setting speed
> not setting duplex
> not setting autoneg
>
>
> I guess before ifup is executed, ethtool cannot get eth0.
>
> Any other suggestions?
Just add another line to force the network up. I just ran this on
my SabreLite and it worked fine:
# Wired or wireless interfaces
auto eth0
iface eth0 inet dhcp
pre-up ifconfig eth0 up
pre-up ethtool -s eth0 speed 10 duplex full autoneg on
I chose 10Mbps so I could make sure the settings were from what
I set, not the automatic ones.
--
------------------------------------------------------------
Gary Thomas | Consulting for the
MLB Associates | Embedded world
------------------------------------------------------------
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