I'd be tempted to run some packet captures on the LAN interface too, filtered for the camera's MAC (or IP, if it's a hop away) to see exactly what traffic is generated.   You can then potentially compare the same to what you see on the WAN port https://documentation.meraki.com/General_Administration/Cross-Platform_Content/Packet_Capture_Overview#Security_Appliances_and_Teleworker_Gateways ... View more