I have a DSL and cable connection, each of which has their own router, running to a turris omni openwrt router running the mwan3 2.8.15-1
I have ping checks configured for the first hop in the ISPs networks.
I have two windows open where I am doing ping -n -i for each of the two links.
I am experiencing a significant number of mwan3 ping check failures while the manual pings are not showing any problem (and are showing ping times <20ms while timeouts are set to 3-4 seconds in the man3 config)
I am also seeing that when the cable connection fails, I also start seeing a very high volume of failure on the DSL mwan3 pings (enough that the DSL link gets marked down as well), I even configured the DSL to ping both the local router and the first hop at the ISP, both fail consistently. During this failure, the manual ping keeps working