A network administrator wants to set up redundant IPsec VPN tunnels on FortiGate by using two IPsec VPN tunnels and static routes.
All traffic must be routed through the primary tunnel when both tunnels are up. The secondary tunnel must be used only if the primary tunnel goes down. In addition, FortiGate should be able to detect a dead tunnel to speed up tunnel failover.
Which two key configuration changes must the administrator make on FortiGate to meet the requirements? (Choose two.)
AC. lower administrative distance = more preferred
a & C is correct
A & C
Conclusion: Enable A (Dead Peer Detection) for failover detection and C (lower distance for the primary tunnel) to prioritize it. Explanation: A. Enable Dead Peer Detection. Correct. Dead Peer Detection (DPD) is essential to quickly detect when a tunnel is down, enabling FortiGate to failover to the secondary tunnel. B. Enable Auto-negotiate and Autokey Keep Alive on the phase 2 configuration of both tunnels. Incorrect. While helpful for maintaining tunnel stability, this setting is not directly required to detect dead tunnels or configure routing preferences. C. Configure a lower distance on the static route for the primary tunnel, and a higher distance on the static route for the secondary tunnel. Correct. A lower distance ensures the primary tunnel is preferred for traffic. The higher distance on the secondary tunnel ensures it is used only during failover. D. Configure a higher distance on the static route for the primary tunnel, and a lower distance on the static route for the secondary tunnel. Incorrect. This reverses the desired behavior, making the secondary tunnel primary.
DPD to know when the tunnel is down + Administrative Distance to prioritize the primary tunnel.
Enable Deed Pear detection complies the second requirement Configure a lower distance on the primary static route complies the first requirement
correct answers