We have a virtual Meraki MX device in an AWS VPC, connecting back to our primary office's ASA over an IPSec tunnel. Our office has a backup fibre line for instances where our primary line goes down, and as such the ASA has two public facing IP addresses. I can't seem to see a way to configure a backup IP address for the ASA end of the tunnel in the Meraki interface to enable this tunnel to failover automatically, and I can't simply set up two tunnels because they'll both be routing the same /16 subnet. Is it possible to configure a failover situation like this so that when our primary line goes down the tunnel will switchover to the failover peer address?
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