[Xymon] Simple Ping Test from a node/server

Hey all, I want to monitor my backup internet connection (simple ping test outbound is fine). I'm going to throw a raspberry pi with dual interfaces on the network, one on the main network and one on the backup internet connection.

What's the best way to implement a ping test from the PI and have it be part of the main server display? Solutions I've considered so far:

• set up the PI as a xymon server and figure out how to get the test results to go back to the main server.
• setup the PI as a xymon client and write some sort of ping test that does the work
• something else I missed?

Thanks!