D is correct, patch: Failed Monitored interfaces > Age > Device Priority > Serial number
Link wthin information: https://docs.fortinet.com/document/fortigate/6.0.0/handbook/666653/primary-unit-selection-with-override-disabled-default
D is the correct answer
When override is disabled (MUPS):
The device that has a higher number of operationally UP Monitored interfaces (M).
The device that has the highest HA Uptime. not the unit uptime (U).
The device which has the highest Priority (P)
Device which has the highest Serial Number (S).
When override is enabled (MPUS):
The device that has a higher number of operationally UP Monitored interfaces (M).
The device that has the highest Priority (P).
A device that has the highest HA Uptime. not the unit uptime (U)
The device that has the highest Serial Number (S).
1. The cluster compares the number of monitored interfaces that have a status of up. The member with the most available monitored interfaces becomes the primary.
2. The cluster compares the HA uptime of each member. The member with the highest HA uptime, by at least five minutes, becomes the primary.
3. The member with the highest priority becomes the primary.
4. The member with the highest serial number becomes the primary.
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