When you have to change the MAC address to change the IP address, that is still a dynamic IP address (static addresses never change without help from the ISP). I refer to this as a sticky IP.
The DHCP server at the ISP remembers the IP address that was assigned to the computer before the router restarted and just "renews the lease" on that IP address. This usually gives the user 3 days to 3 months without having to change IP addresses. This is actually the way things are supposed to work.
For most routers, there is a way to use the router's control panel to change its effective MAC address.There are several examples in the forum.
The problem is that each router is different, so there is no way to create an option to do this automatically. This is just part of the script. The problem is that there is no way to keep choosing new IP addresses. The easiest way to do this is to restart twice, once with a fake MAC address and once with the real MAC address.
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