Raymarine Raynet Protocol with Quantum II

[BigAl.NZ]

I am trying to packet sniff the data between my Raymarine Quantum II radar and the chart plotter to provide the data to OpenCPN radar guys to write the plugin.

Apparently nobody has done this to date and it sound pretty easy to I set my switch up like in the picture with span on the correct ports to sniff the traffic.

After I while I could easily see the IP addresses and traffic between the Axiom plotters there was nothing going to the radar (even from the slave plotter which was displaying and controlling the radar).

I also never saw and IP address for the radar. I tried a few other configurations of my sniffing setup and eventually even plugged the radar into the ethernet port of my PC - nothing.

Does anyone know what protocol / transport layer they are using between the modern radars and plotters? It doesnt seem like TCP/IP??

[SolentBlue]

Hi. Does the diagram show your actual setup? If so it could be that your sniffer running on the laptop is on a wired Ethernet whereas the radar is on a separate Wi-Fi network.

[shimari]

Two possibilities: 1. as @SolentBlue describes the radar is using wifi. 2. You're using an ethernet switch rather than a hub. You'll either need a cheap old-school hub, or a decent switch that permits span ports. If you don't know about span ports, find a hub.

Sniffing wifi may or may not be easier - I don't know if raymarine uses encryption for their wifi connections.