You did not mention a router. AFAIK, you cannot connect a cable modem to a switch and have this service multiple PCs with internet access. It will be possible to use ICS, however. Is this what you are trying to do? If so, I'd say a better way is to get a router. You can either set up static addresses in each PC or use DHCP. The router becomes the gateway. In my own house, I use static addressing. It seems to bring things up quicker. I disable DHCP in the router and assign a static IP address to all devices on the network. Remember, the router has an address. On each PC, I set the gateway to the routers IP address. I also use DNS so you need to get these from your ISP. I have had some problems using DHCP and "automatic" settings so prefer to set it up manually. Works great. Hope this helps.