Fortinet
FCSS_NST_SE-7.4 · Question #62
Refer to the exhibit, which shows the partial output of a real-time OSPF debug. Why are the two FortiGate devices unable to form an adjacency?
The correct answer is C. One FortiGate device is configured to require authentication, while the other is not. One FortiGate is sending Hellos with authentication (non‑zero AuthType) while the other is set to AuthType 0, triggering an "Authentication type mismatch" and preventing adjacency.
Routing and Policy Troubleshooting
Question
Refer to the exhibit, which shows the partial output of a real-time OSPF debug. Why are the two FortiGate devices unable to form an adjacency?
Exhibit
Options
- AThe Hello packet is being sent from an OSPF router with ID 0.0.0.112.
- BThe two FortiGate devices attempting adjacency are in area 0.0.0.0.
- COne FortiGate device is configured to require authentication, while the other is not.
- DThe passwords on the FortiGate devices do not match.
How the community answered
(13 responses)- A8% (1)
- C85% (11)
- D8% (1)
Explanation
One FortiGate is sending Hellos with authentication (non‑zero AuthType) while the other is set to AuthType 0, triggering an "Authentication type mismatch" and preventing adjacency.
Topics
#OSPF adjacency#authentication mismatch#Hello packet#OSPF debug
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