P.S. the tool you're looking for is ethtool.

mii-tool is obsolete.

Michael Joy
HEP - University of Mississippi
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On Mon, 2005-02-14 at 17:55 -0600, Michael David Joy wrote:
> Well the first thing I'd say is that the realtek chipset's are terrible
> if you really want performance. They don't do any packet header
> processing or other tcp hardware offloading, causing your CPU to take
> the brunt of the packet load (with gigabit this is bad).
> 
> I would recommend Broadcom or Intel based gigabit cards.
> 
> Regardless of this fact, mii-tool doesn't support reading out gigabit
> link status. It'll give you a link up status with 100FD for 1000FD cards
> linked at 1000FD with flow control enabled.
> 
> I know it at least reports on the broadcom and intel based cards with a
> link up status.
> 
> Otherwise, I think you might need to find another tool to get real link
> status out of a gigabit nic.
> 
> On Tue, 2005-02-15 at 09:32 +1000, Michael Mansour wrote:
> > Hi,
> > 
> > I've just purchased some Netgear 1gigabit ethernet cards and to my 
> > dissapointment mii-tool couldn't be used to query them, even though the linux 
> > kernel has no issues with using them.
> > 
> > I run cluster software with SL303 which uses mii-tool to do link level 
> > checking etc... so my question is, which 1gigabit cards work correctly with 
> > SL303 and mii-tool? so that I get output similar to the following:
> > 
> > [root@anaconda root]# mii-tool
> > eth0: negotiated 100baseTx-HD, link ok
> > eth1: negotiated 100baseTx-HD, link ok
> > SIOCGMIIPHY on 'eth2' failed: Operation not supported
> > 
> > note: eth2 is the Netgear card (which uses a Realtek chip), the other two are 
> > just standard Realtek PCI cards.
> > 
> > Thanks.
> > 
> > Michael.