Which firmware upgrade method for an active-passive HA cluster ensures service outage is minimal, and there are no unnecessary failovers?

Question

Options

• ABreak the cluster, upgrade the units independently, and then form the cluster
• BUpgrade both units at the same time
• CUpgrade the standby unit, and then upgrade the active unit
• DUpgrade the active unit, which will upgrade the standby unit automatically

• A
  6% (1)
• B
  78% (14)
• C
  6% (1)
• D
  11% (2)

Explanation

Explanation/Reference: https://docs.fortinet.com/document/fortimail/6.2.0/administration-guide/725928/upgrading-firmware-on-ha-units

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