xl0 full duplex

[Andrea Venturoli]

Hello.
I have a 3C905 PCI 10Mb/s Ethernet Card, which i configure with:

ifconfig_xl0="inet 10.1.2.15 netmask 255.255.255.0"

in /etc/rc.conf.

ifconfig shows:

xl0: flags=8943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST> mtu 1500
        options=3<rxcsum,txcsum>
        inet 10.1.2.15 netmask 0xffffff00 broadcast 10.1.2.255
        inet 10.1.2.126 netmask 0xffffffff broadcast 10.1.2.126
        ether 00:00:5e:00:01:02
        media: Ethernet 10baseT/UTP (10baseT/UTP <half-duplex>)

I tried:

ifconfig xl0 10.1.2.15 netmask 255.255.255.0 mediaopt full-duplex

since it is connected to a full-duplex switch.

However, network throughput will crawl, i.e, for example, listening to an mp3 from this machine will give 1 sec. of
audio, then 1 sec. of silence, then 1 sec. of audio, and so on.

Any hint? Is full-duplex known to be broken on this card? Do I do something wrong?

 bye & Thanks
        av.

P.S. I almost forgot:

uname -a gives:
FreeBSD bane.ventu 4.7-RELEASE-p10 FreeBSD 4.7-RELEASE-p10 #2: Sun Jul  6 16:13:
25 CEST 2003     root at bane.ventu:/usr/src/sys/compile/BANE  i386