network not performing - where to start?

[Boldra]

Hi

I'm running 6.2 as a fileserver and sambaPDC on a home network, and I'm 
having problems with network performance.

The machine is an old laptop with a pcmcia 10/100 network card but it 
seems that I'm not getting better than a 10Mbit connection.  This number 
is based largely on observations copying large files to and from 
windows, I'm sure there's a better way to test this from BSD. 

I believe I've eliminated everything outside the network card by doing 
some tests with a crossover cable and checking the switch and cable. I 
believe I've eliminated problems inside the machine with various "time 
dd if= of=" tests.

I think ifconfig -a is saying that the os thinks the card is 100Mbit:

ed1: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
        inet 192.168.1.5 netmask 0xffffff00 broadcast 192.168.1.255
        ether 00:a0:0c:40:32:a3
        media: Ethernet autoselect (100baseTX <full-duplex>)
        status: active


So my questions are:
How do I check the network performance from within freebsd?
What other tools can I use to check for network problems?
How can I check the network card is configured and working correctly?

Thanks for any help!

Paul Boldra