I’ve been down this rabbit hole myself — trying to run two NVRs side-by-side and have them play nice isn’t as straightforward as it should be.
From what you described, the issue sounds like a classic IP conflict or overlapping control between NVRs trying to manage the same cameras. The RLN16-410 is pretty limited when it comes to accessing external cameras unless they’re on the same subnet and not already “claimed” by another NVR. stickman hook
A few things to try if you haven’t already: Manually add cameras via IP using ONVIF, but make sure the cameras aren’t currently bound to the RLN36. You may need to go into the camera’s settings and disable Reolink UID/P2P or unbind it temporarily from the RLN36. Static IP addresses for all cameras — avoid DHCP entirely. That’ll help eliminate some of the switching/flipping you saw when both NVRs were plugged into the same switch. Use the back monitor as a standalo