If an NVR switch causes your cameras to lose connection intermittently, it is due to an IP conflict and your NVR switch is set to the same subdomain as your router.
To correct an IP conflict:
Check the Default Gateway value. If the gateway is the same IP address as the switch setting on your NVR (default: 10.1.1.1.), you have an IP conflict. To resolve this, change the IP address and Default Gateway on your NVR under switch settings.
RECOMMENDED: Refer to your user manual for model specific instructions on how to change the switch settings. Click here for downloads and documentation for your product.