DART-6UL Ethernet
From Variscite Wiki
DART-6UL - Ethernet
There are 2 100B/s ports on the kit. eth0, eth1. Make sure you don't connect both of them to the same network.
On Target:
$ ifconfig $ iperf -s -u
On Host:
$ iperf -c 192.168.1.189 -u -b90M