You didn't say which NetBSD version you're running.
I have trouble getting my 21143 based board to FD, but I hace SMC 21140A
based board which works nicely at 100Mbs FD with the tulip driver.

On Fri, Dec 17, 1999 at 07:11:34PM -0500, Paul J. Lavoie wrote:
> 
> Hello. I have been having trouble with a quad port ZNYX ZX346 card, getting it 
> to autonegotiate with some switches - the switch chooses full duplex, the card 
> chooses half. This tends to not work very well. Attempts to configure the card 
> ports to full-duplex fail miserably - the drivers don't recognize the 
> full-duplex option. I have hard coded the switch side to half-duplex, but I 
> was hoping to get this working properly.
> 
> Does anyone have any suggestions? Any idea as to where to look in the code for 
> resolving the issue? Do either of the other BSDs have this problem?
> 
> The chips on the board are 4 Digital 21140-AF, although the tlp and de drivers 
> reports 21140A. Probably of no consequence...
> 
> Just discovered, trying to see if any single port cards exhibited this, that 
> we do have one card that is properly showing the full-duplex media options. 
> Unfortunately, its off site, and will take some time to figure out how its 
> different. The other dozen cards do not show this trait.
> 
> Any guidance would be very welcome.
> 
> -pjl
> 
> -------------------------------------------------------------------------------
> Paul J. Lavoie		pjl@ilx.com		(212) 510-3029
> ILX Systems, Inc.	111 Fulton St		New York, NY  10038
> 
> 


--
Manuel Bouyer <bouyer@antioche.eu.org>
     {Net,Free}BSD: 22 ans d'experience feront toujours la difference
--