I just purchased a NVR5216-16P-4KS2 for use with ~8 Dahua cameras. My previous experience has been with a netgear swich and BI. Do I just plug all the cameras into the NVR and power it on or do I need to reconfigure each camera one at a time with a new IP before connecting it to the NVR? The NVR will be initially setup with no internet access as the location it will be installed doesn't have internet and we rely strictly on a hotspot for internet.