u/Ut0p1an

I am setting up a opensource router/firewall to replace the Zytel device from Hyperoptic. I have a static IP address but it appears that is being issued by DHCP to my router. Has anyone else done anything similar? Is there anything specific I need to do on the service to ensure I don't cause the CPE port to fail when I install the new router? Do I need to register the MAC of the device with Hyperoptic (or clone the existing)??