Our Cisco RV340 router is connected to two WAN modems for redundancy (the two are from different ISPs).
The modems are configured for NAT and the router gets its addresses from each using DHCP (i.e., one serves 184.108.40.206, the other serves 220.127.116.11 and the router DHCP server serves addresses 10.100.101.2-200 to the internal LAN).
The problem is that the router fails to detect when one of the WAN links fail since the connection to the internal 18.104.22.168 and 22.214.171.124 is always good).
Is there any way make the router check the connection through each WAN interface by - say - pinging a remote address or similar?
[there is no way to configure the two modems to work in "bridge" mode. These are simple consumer devices]