[vortex] Problem with Nokia ADSL modem/hub and 3c905

Ville Herva vherva@mail.niksula.cs.hut.fi
Wed, 24 Jan 2001 17:51:48 +0200

On Wed, Jan 24, 2001 at 10:41:27AM -0500, you [Donald Becker] claimed:
> On Wed, 24 Jan 2001, Ville Herva wrote:
> > I have a Nokia ADSL modem with 4 10MBit ethernet ports. I have a
> > linux 2.2.18 box with one 3c905A connected to it. If I unplug the
> > network cable from the Nokia box and try to plug it back, the link leds
> > stay off. If If boot the Nokia box, the leds are on, but the connection
> > won't work. The Nokia box doesn't answer arp etc. If I now boot the Linux
> > machine, everything works again.
> This is a almost certainly a bug in the Nokia's repeater.

That's what I figured, too.

I was just interested in a way to circumvent it.

> The 3c905A uses an external MII transceiver, likely the DP83840.
> First, verify that you are not passing any options to the driver -- the
> driver should use the default MII mode.

I did try insmodding with or without options. I tried several times
without options.

> Run 'mii-diag -R' as root.  This will reset the transceiver, which
> briefly brings the link down than then restarts autonegotiation/autosensing.

Will try when I get home.
> > What might cause this? I'm guessing somekind of duplex negotiation
> > failure. 
> Use 'mii-diag -w' to watch the link status as you unplug the cable.

Will do.


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