I'm trying to figure out the best way to monitor a WAN connection. I'd like to use this monitor as a dependency for my other checks. Most people would use "ping" to monitor a WAN link, however it would appear that ping is forced to use the parent device's IP (other sensors can have an IP/DNS name override..why doesn't ping?). However, I dont want to base ALL of my monitors and dependencies on the ping of a single device on the internet... I tried to make the dependency a group, but it doesnt appear that I can make one group dependent on another group.
I'd rather ping 3-4 hosts on the internet, and ONLY if the whole group is down would the alerts stop for the group who is dependent on the ping of the 3-4 hosts.
Basically, if my ISP has a routing or upstream failure I dont want 500 Alerts hitting my ticketing system... but I'm also leery to make all of my alerts dependent on the ping of a single IP Address...
What have others done? How do you monitor your WAN links and make your groups dependent on them?