We use POE Switch and the xvr doesnt have poe ports. so it is the private poe cam.
In that case log into each cam's webGUI, one at a time, using it's known IP and assign it a unique, static IP in the desired subnet, the same subnet as the XVR's LAN IP; if there's a router in that same LAN subnet be sure to use IP's that are OUTSIDE of that router's DHCP pool.
Set your PC to a static IP in the current subnet of the cams, such as 10.1.1.20, subnet mask of 255.255.255.0, no gateway then log into each cam one at a time and perform the above. When the last camera has been configured as desired, set the PC back to the the way it was.