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Old 15-01-2004, 19:09   #12
rdhw
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Join Date: Oct 2003
Location: Cambridge
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Re: How do cablemodems work?

Quote:
Originally Posted by Tristan
So what happens if you set your PC/router to a fixed IP address (say you've had the same one for months), so that the modem doesn't make the initial DHCP request?
You are confusing the cable modem's IP address, which it obtains by DHCP, and your PC's IP address, which your PC obtains by DHCP. You cannot prevent the cable modem obtaining its own IP address by DHCP: it does all this long before your PC is allowed to talk to the network.

If you attempt to set a static IP address on your PC, then NTL will eventually find you out (when your PC fails to renew its DHCP lease), and disconnect you from the network. (This has nothing to do with how cable modems work).
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