On Mon, Jun 10, 2019 at 04:06:33PM +0200, Andrew Lunn wrote:
> On Mon, Jun 10, 2019 at 04:58:48PM +0300, Ido Schimmel wrote:
> > On Mon, Jun 10, 2019 at 03:48:20PM +0200, Andrew Lunn wrote:
> > > > + # Skip 56G because this speed isn't supported with
> > > > autoneg off.
> > > > + if [[ $speed == 56000 ]]; then
> > > > + continue
> > > > + fi
> > >
> > > Interesting. How is 56000 represented in ethtool? Listed in both
> > > "Supported link modes" and "Advertised link modes"?
> >
> > Hi Andrew,
> >
> > Yes. We recently sent a patch to error out if autoneg is off: Commit
> > 275e928f1911 ("mlxsw: spectrum: Prevent force of 56G").
>
> I never get access to high speed links like this. Do you have a
> reference to why 56G needs auto-neg? What makes it different to every
> other link mode?
Hi Andrew,
I verified with PHY engineers and this limitation is specific to our
hardware, so no external reference I can provide.
