netdev - Re: Help interpreting MII negotiation

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Message-ID: <9e4733910905062030yb63ef3eoa6347123507969ef@mail.gmail.com>
Date:	Wed, 6 May 2009 23:30:08 -0400
From:	Jon Smirl <jonsmirl@...il.com>
To:	Ben Hutchings <bhutchings@...arflare.com>
Cc:	netdev@...r.kernel.org
Subject: Re: Help interpreting MII negotiation

On Wed, May 6, 2009 at 10:55 PM, Ben Hutchings
<bhutchings@...arflare.com> wrote:
> On Wed, 2009-05-06 at 22:03 -0400, Jon Smirl wrote:
>> I don't understand why speed selection is getting set at 10Mbps in this example.
>> It looks to me like the devices auto negotiated 100Mbps.
> [...]
>
> The "speed selection" bits have no meaning unless auto-negotiation is
> disabled.

Thanks, that explains the first example.

What is going on in the second example? That PHY is jumpered to 100Mb.
My host is 100/10 capable. Why is it reporting 10Mb when the PHY is only
capable of 100Mb?

>
> Ben.
>
> --
> Ben Hutchings, Senior Software Engineer, Solarflare Communications
> Not speaking for my employer; that's the marketing department's job.
> They asked us to note that Solarflare product names are trademarked.
>



-- 
Jon Smirl
jonsmirl@...il.com
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