Facilitating discovery
Discovery of the cameras by the FortiRecorder NVR uses mDNS. For it to work, cameras usually must be on the same IP subnet as the NVR, and must not be impeded by firewalls or other network filtering. If cameras are not on the same subnet, you may still be able to facilitate discovery traffic by configuring your FortiGate or other device with multicast forwarding.
If you do not know which device is impeding discovery, you can either:
• Temporarily attach the cameras to a closer point on the network, such as a local switch or directly to the FortiRecorder NVR, so that discovery is not blocked.
• Manually add the camera to the FortiRecorder NVR’s list of known cameras, skipping discovery.