OS9 - Comcast dhcp modem - Linksys Router

I have been running both DSL(OS9) and Cable modems(OSX) for several months. Now it's time for SBC to go - I have about 10 reasons why, which I won't bore you with. One reason is speed. DSL=200K ($50), and Cable=an unbelievable 15M ($42).
I have just set up a Linksys 4-port Ethernet router with a Comcast Scientific Atlanta cable modem. Two computers are connected - a Compac PC on Port1(W2000), and a digital audio G4 on Port2(OS 10.3.9). Works great - was surprisingly easy!
BUT, I also want to boot from a second drive in the G4 running OS 9.2, due to various OS9 applications I love, that have no OSX counterpart. But I can't get it to work. (Was using DSL for OS9.)
Can someone please tell me what I need to do to configure my OS9 system properly, to get it to work with the Linksys router.
Thank you very much for your time.
Digital Audio G4 Mac OS 9.2.x

Hi Vaughn:
I was surprised the dhcp setting that Don suggested did not resolve your issue.
I have OS X and OS 9 computers running on a home network connected through a D-Link router which is connected to Comcast's Motorola Cable Modem. A similar set-up to what you describe. (BTW, I don't think Comcast would not talk to you because you don't use their router, my third party router hasn't been an issue when I've called Comcast) Also, I'm in NJ, Comcast doesn't require a Client ID or number here, but I don't know if that holds true everywhere.
Unless you recall specifically requesting a Static IP when you started with Comcast, I'm pretty sure you have Dynamically assigned IP, which as Don suggested, requires you simply set the panel as Using DHCP Server and your IP is assigned.
A clue may lie with what your successful OS X settings are: take a look at your Network Preferences in OS X, these should be the same on your OS 9 TCP/IP control panel set-up (I'm assuming you are booting up in 9, not running Classic within X)
I don't have a definitive solution, but some things I'd look at in OS 9:
TCP/IP Control Panel
Switch to Advanced User Mode (I think that's under one of the menus, don't have 9 handy right now to check, sorry) - it's more configurable that way, and make sure you have the TCP/IP Always On option checked off, button is on bottom right, brings up dialog.
I would also make sure you have Appletalk enabled in the Appletalk control panel and that you are connected via Ethernet there too.
Do you have more than one ethernet card? Perhaps in the drop down you are selecting a card that is not connected? If it is a third party ethernet card, is the driver loaded/enabled in extensions?
When in OS 9, can you see your other computers on your network in the Chooser? That may point to an ethernet issue in OS 9. In your browser, can you type in the address of your router and see that? How about the modem itself - try http-//192.168.100.1
I'm out of ideas for now, please write back with experience. As a last resort I'd give Comcast a call rather than pay for a technician, they don't even have to know it's a third party router. Good luck.

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