Enabling LAN health check will bring down WAN IPSec tunnels on the VPNC if all route peering is lost on the VPNC LAN - This is done to prevent black holing traffic.Also, if the next-hop router fails and thus the peers route updates fail - the VPNC would stop advertising those routes into the SDWAN Overlay. Unless of course there is a broad DC Aggregate that matches an interface on the VPNC.
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