Subject: Re: tlp won't do full duplex
To: Jim Bernard <>
From: Jason R Thorpe <>
List: current-users
Date: 07/02/2000 10:25:59
On Sun, Jul 02, 2000 at 11:09:30AM -0600, Jim Bernard wrote:

 > > Note that if you have tlp-supported card that uses a separate PHY, then
 > > all this works correctly (mostly because the PHYs are *MUCH* easier
 > > to program).
 > > 
 > > Now, wrt. it failing to work when you hard-wire 100TX-FDX on the tlp
 > > end, blame the badly specified IEEE 802.3u standard.
 >   Does that mean that the card isn't responding properly to what the driver
 > is telling it, but there still might be some hope of figuring out a way to
 > make the card stay full duplex when ifconfig requests full duplex?

No, it means the driver isn't programming the card correctly to do
the autonegotiation.  Using the built-in NWAY block on 21143 and
the clone chips can be fairly complicated to get right.  It's just
a difficult programming interface.

 >   Is there a straightforward way to patch the driver to not change the
 > autonegotiated settings (recall that the full-duplex light on the switch
 > is on until ifconfig runs)?

No.  There is not.

        -- Jason R. Thorpe <>