USB ethernet connection not working

I'm trying to establish a connection between a SL-5000d and a RedHat 7.3 box.
FIrst let me say that I don't know what ROM version I have.  The System Info 
-> Version page does not have a ROM version line as the 
rom_upgrade_howto.shtml describes.  How can I get the ROM version?

I've gone through linux_ethernet-over-usb-howto.shtml and installed the 
usbdnet module.  When I put the Zaurus on the crade the kernel reports the 
following  in /var/log/messages:

Oct 20 01:04:32 localhost kernel: hub.c: USB new device connect on bus1/2, 
assigned device number 4
Oct 20 01:04:32 localhost kernel: usb.c: ignoring set_interface for dev 4, 
iface 0, alt 0
Oct 20 01:04:32 localhost /etc/hotplug/net.agent: invoke ifup usb0
Oct 20 01:04:35 localhost /etc/hotplug/usb.agent: Setup usbdnet usbdnet 
CDCEther acm CDCEther for USB product 4dd/8004/0


I type the following as per the howto:
> /sbin/ifconfig usb0 192.168.1.200 netmask 255.255.255.255 up
> /sbin/route add -host 192.168.1.201 usb0

When I try to ping the Zaurus I get 'Destination Host Unreachable' and 
messages from usb-uhci in /var/log/messages like this:

Oct 20 01:08:01 localhost kernel: usb-uhci.c: process_transfer: fixed toggle
Oct 20 01:11:46 localhost last message repeated 7 times
Oct 20 01:33:50 localhost last message repeated 9 times


-Karl




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