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Question 27 - NSE7_NST-7.2 discussion

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Exhibit.

Refer to the exhibit, which shows the output of diagnose sys session list.

If the HA ID for the primary device is 0. what happens if the primary fails and the secondary becomes the primary?

A.
The session will be removed from the session table of the secondary device because of the presence of allowed error packets, which will force the client to restart the session with the server.
Answers
A.
The session will be removed from the session table of the secondary device because of the presence of allowed error packets, which will force the client to restart the session with the server.
B.
The session state is preserved but the kernel will need to re-evaluate the session because NAT was applied.
Answers
B.
The session state is preserved but the kernel will need to re-evaluate the session because NAT was applied.
C.
Traffic for this session continues to be permitted on the new primary device after failover. without requiring the client to restart the session with the server.
Answers
C.
Traffic for this session continues to be permitted on the new primary device after failover. without requiring the client to restart the session with the server.
D.
The secondary device has this session synchronized; however, because application control is applied, the session is marked dirty and has to be re-evaluated after failover.
Answers
D.
The secondary device has this session synchronized; however, because application control is applied, the session is marked dirty and has to be re-evaluated after failover.
Suggested answer: C

Explanation:

Session Synchronization:

FortiGate HA (High Availability) ensures that active sessions are synchronized between the primary and secondary devices. This synchronization allows for seamless failover and continuity of sessions.

Handling NAT Sessions:

The session in the exhibit has NAT applied, as indicated by the hook=post dir=org act=snat entry. FortiGate's HA setup is designed to handle such sessions, ensuring that traffic continues without interruption during failover.

Session Preservation:

Even with the presence of NAT, the session state is preserved across the HA devices. This means that ongoing sessions do not require re-establishment by the client, thus providing a seamless experience.

Fortinet Documentation: HA session synchronization and failover

Fortinet Community: Understanding session synchronization in FortiGate HA

asked 18/09/2024
Emmanuel Aminu
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