Maintenance
Maintaining firmware levels in a High Availability (HA) cluster is critical for security and stability. FortiOS provides flexible options for upgrading clusters, ranging from fully automated, zero-downtime procedures to manual, staged upgrades that allow for granular verification.
This section covers the two primary methods for HA firmware maintenance:
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Topic |
Summary |
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The standard approach using default or simultaneous upgrade modes. |
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An advanced method that places the cluster into a temporary mixed-version state for testing and verification. |