iperf server and client on same computer

[airandfingers]

Hi, I'm trying to do some network testing using iperf, and I'd like to be able to run both the iperf client and server on the same computer. My problem is that I can't get the computer to rout the packets to an external device on the network, rather than take a shortcut and internally rout the packets to the other network card. Iperf's man page says its bind option can take an interface as an argument, but when I try:


/usr/bin/iperf -l 1392 -s -u -P 2 -B eth0

I get the error:

error: No address associated with hostname


If this is not the right way to specify an interface, what is?

Thanks,
Aaron

[CableCat]

This error is iperf's way of reporting that it was unsuccessful in resolving a hostname to an IP address.

For example this will preduce that error:
iperf -c -u iperf

While the correct way is this (-u and -c is swapped):
iperf -u -c iperf

I hope this helps.