netdev - Re: ETHTOOL_GSET IOCTL on GigE links

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Date:	Fri, 01 Jun 2007 19:04:36 -0400
From:	Jeff Garzik <jeff@...zik.org>
To:	Jeff Haran <jharan@...cade.COM>
CC:	linux-net@...r.kernel.org, netdev <netdev@...r.kernel.org>
Subject: Re: ETHTOOL_GSET IOCTL on GigE links

Jeff Haran wrote:
> OK, but my question remains. In the case where a device supports one set
> of speeds via autonegotiation and another set via forcing, how does one
> tell which speeds can be forced and which can be autonegotiated?

The interface does not currently support such enumeration.

You can certainly attempt forcing a speed, and see what happens.  The 
driver will either (a) work, (b) refuse and give you an error message, 
or (c) present you with a situation that requires filing a driver bug 
report :)

	Jeff

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