I have decided that perhaps I provided too much information, including
too many things I was making guesses about.

I have my network card from my PowerMac plugged into a LinkSys
Etherfast DSL/CABLE router with an eight port autosensing 10/100 base
T switch.

There are three lights for each local connection: link, Full, and
100. I can get the link and the 100 light to light but not the full
light. I took this to mean a full duplex connection was not in
place. All three lights light from a PC and an iMac that have 100baseT
capability.

On Fri, Jul 27, 2001 at 04:01:23PM -0700, Bill Studenmund wrote:
> On Thu, 26 Jul 2001 josh@ssimr.com wrote:
> 
> > Two hopefully simple question.
> >
> > How do I make my network card use Full Duplex as opposed to simplex. I
> > figured out how to set the cards media options to full duplex. I
> > assume there is a way as the flags fields displays SIMPLEX.
> 
> As Manuel mentioned, SIMPLEX means something different - the ethernet
> interface doesn't hear its own transmissions, so the network stack should
> echo a copy of a packet back to itself.
> 
> > bash-2.04# ifconfig -mL de0 inet
> > de0: flags=8863<UP,BROADCAST,NOTRAILERS,RUNNING,SIMPLEX,MULTICAST> mtu 1500
> >         address: 00:00:c5:53:3b:dd
> >         media: Ethernet 100baseTX full-duplex
> >         status: active
> >         supported Ethernet media:
> >                 media 10baseT
> >                 media 10baseT mediaopt full-duplex
> >                 media 100baseTX
> >                 media 100baseTX mediaopt full-duplex
> >                 media autoselect
> >         inet 192.168.1.6 netmask 0xffffff00 broadcast 192.168.1.255
> 
> Check out the mediaopt options of ifconfig.


I have tried to check out the mediaopt options. The man page page
tells me to check the documentation for the device "man -k de0"
provides nothing.

-- 
Josh Kuperman
josh@ssimr.com
http://www.ssimr.com