NSE 7 — Enterprise Firewall — Question 68

An administrator configured the following command on FortiGate.

config router ospf
set restart-mode graceful-restart

Which two statements correctly describe the result of the above command? (Choose two.)

Answer options

• A. In an HA cluster, FortiGate devices will keep the OSPF routes in their routing table to avoid traffic interruption during an HA failover.
• B. The OSPF neighbor that receives the grace link-state advertisement (LSA) will enter into helper mode.
• C. After the default 40 seconds wait time, the OSPF neighbors will resume communication with the restarting router.
• D. FortiGate is configured with graceful restart, and will exit graceful mode, if the network topology changes.

Correct answer: A, B

Explanation

Option A is correct because it describes how OSPF routes are maintained during HA failover, ensuring continuous traffic flow. Option B is also correct as it indicates the behavior of the OSPF neighbor upon receiving the grace LSA. Options C and D are incorrect because they either misstate the timing and actions during OSPF communication or do not accurately describe the graceful restart functionality.