Create the file /etc/sysconfig/network-scripts/ifcfg-usb0 with the following content:
Now, blacklist the CDCEther module that would load by default on a standard RedHat 9 installation.
echo "CDCEther" >> /etc/hotplug/blacklist
In case the module is loaded, remove it with: rmmod CDCEther
That is it. Put the Zaurus on the cradle and ping it: ping 192.168.129.201