network not performing - where to start?

Erik Norgaard norgaard at
Mon Feb 18 09:57:28 UTC 2008

Boldra wrote:

> I think ifconfig -a is saying that the os thinks the card is 100Mbit:
>        inet netmask 0xffffff00 broadcast
>        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?

It is not irrelevant which protocol you use to copy large files. Some 
protocols has less overhead. Also, you may experience better performance 
between bsd stations, if you can try set up two bsd stations to test 
performance on different protocols, ftp, http, tftp, whatever.

I think the best I have had on a 10Mbit/s was 1Mbyte/s - that is about 
80% is actually effective payload. Another thing you can do to get more 
correct numbers is to use the packet filtering statistics.

Cheers, Erik

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