Many of our offices use Comcast copper for primary Internet connectivity and use their Connection Pro, which is a cellular backup modem. WAN1 from the MX plugs into the coper modem, WAN2 into the cellular backup. We do not have connectivity between the two modems, otherwise we would have no visibility to failover events.
One of our sites barely has a strong enough 4G signal - about 10 Mbps with low jitter, but connectivity apparently drops several times per day, long enough to cause the site-to-site VPN connection to go down.
It would be nice if Meraki could at least include the public IP addresses involved in the connection, or the WAN port, or both, so that Outlook inbox rules can be created to ignore some of these alerts. I only care if the connection goes down if it happens while I am in a failover.
I could for this one particular network just not use WAN2 and have the copper modem connected to the cellular modem like Comcast suggests. The only way we would know of a failover event is if someone at the remote office complains about bandwidth or maybe there is another alert about a site-to-site route change.
Or, if someone has a better idea, I would be open to some suggestions. I doubt there is some magic setting that just keeps the tunnel open when a connection is down for several minutes. DNS has to happen across the tunnel, so even if I could turn off the VPN for WAN2, it would not be too helpful.