Yes, link_speed reports what the kernel reports.  It is not a mechanism
for setting the link speed.

On Tue, Nov 04, 2014 at 04:28:36PM +0000, Savvas Zannettou wrote:
> So you are saying that OpenvSwitch does not define the link_speed in the
> source code but it just takes the information from the underlying linux
> kernel?
> 
> On Tue Nov 04 2014 at 5:23:44 PM Ben Pfaff <b...@nicira.com> wrote:
> 
> > The message from ethtool probably indicates that the kernel driver
> > doesn't support configuring that feature, so there probably isn't any
> > way to do it.  (This will still be the answer no matter how you rephrase
> > the question.)
> >
> > On Tue, Nov 04, 2014 at 11:58:03AM +0000, Savvas Zannettou wrote:
> > > Hi,
> > >
> > > Do you know what changes do i have to do in OVS source code so the
> > default
> > > advertised link speed to be 10Mbps for example?
> > >
> > > Thanks,
> > > Savvas
> > >
> > > On Wed Oct 22 2014 at 4:48:16 PM Ben Pfaff <b...@nicira.com> wrote:
> > >
> > > > The message from ethtool probably indicates that the kernel driver
> > > > doesn't support configuring that feature, so there probably isn't any
> > > > way to do it.
> > > >
> > > > On Wed, Oct 22, 2014 at 10:10:25AM +0200, Savvas Zannettou wrote:
> > > > > Hi,
> > > > >
> > > > > Do you have any other idea how i can change the advertised port
> > speed of
> > > > > OVS?
> > > > >
> > > > > Thanks,
> > > > > Savvas
> > > > >
> > > > > On Tue, Oct 21, 2014 at 8:40 PM, Ben Pfaff <b...@nicira.com> wrote:
> > > > >
> > > > > > On Tue, Oct 21, 2014 at 03:24:03PM +0200, Savvas Zannettou wrote:
> > > > > > > I want to change the advertised speed for the OVS Switches that i
> > > > create
> > > > > > > from my mininet. The default value is 10Gbits/s and i want to
> > > > decrease
> > > > > > it.
> > > > > > > Do  you know any way how to achieve that from Mininet Api or any
> > > > other
> > > > > > way
> > > > > > > to get this done?
> > > > > > >
> > > > > > > I tried with ethtool but i get the following error:
> > > > > > > Cannot set new settings: Operation not supported
> > > > > > >   not setting speed
> > > > > >
> > > > > > That probably indicates that the kernel driver doesn't support
> > > > > > configuring that feature, so there probably isn't any way to do it.
> > > > > >
> > > >
> >
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