[SC.LUG] Unix Network configuration help please!

[Neil Lucock]

Hi,
I can't get my HP Visualize C180 to connect to the network, despite following 
the instructions in HP's own documents. If I describe what I've done, can 
someone tell me if I'm doing something stupid (apart from buying too many 
computers to play with!)
The machine runs CDE and has SAM as a configuration tool. The network uses a 
Speedtouch adsl modem acting as a DHCP server for a mixture of Linux and 
Windows machines. The modem's instructions said to make all IP addresses 
10.0.0. *something* The light on the ethernet port doesn't light up when the 
machine is running, I can't ping the modem, but I can ping the card (lan0)

The hostname is "visual". The hosts file has 
localhost 127.0.0.1
visual 10.0.0.9 (default gateway)
speedtouch	10.0.0.138

The Network interface card's part of SAM has one entry:
ethernet lan0 8/16/6	enabled	10.0.0.9	255.0.0.0 and a hex address

Is my problem that the ethernet card has the same IP number as the machine? 
(I've tried changing it to another number). If so, what should I change it 
to? HP's documents just say "get the info from your system administrator". 
I've set the card's broadcast address to 255.255.255.255 manually, I've told 
the system to use DHCP. I seem to be running out of ideas what to do next.
thanks for any ideas/suggestions/guides to foolproof Unix configuration. I've 
tried http://docs.hp.com/ which is good, but doesn't make it work.

Neil