On January 16, 2014 at 10:11, alihashemi said...
So to let you know how I've seen it work:
ISP comes out, install's two separate modems, each modem is given a static IP. Each person connects to their modem and configures their router for static IP given by ISP. Simple as that. If ISP isn't putting in two separate modems, they'll put in something that can separate the IP's. You just plug from the ISP device into your WAN port, then configure router to the ISP provided static IP info.
Modems arent assigned IPs, yor router is assigned a dhcp or static IP from the isp network. You can have one modem and have one or a hundred IPs from the isp. With the shortage of public IPs, most providers want to see only one IP used per account unless your paying for more. I worked on a business a few years ago with Shaw internet and they had Motorola modem connected direct to switch and every computer in the office was pulling a public dhcp IP. Im sure Shaw would have had a fit if they knew one customer was using 40+ IPs.
