An uninterrupted upgrade occurs without interrupting communication in the cluster.
To upgrade the cluster firmware without interrupting communication, the following steps are followed. These steps are transparent to the user and the network, and might result in the cluster selecting a new primary unit.
The administrator uploads a new firmware image using the GUI or CLI. SeeFirmwarefor details.
The firmware is upgraded on all of the subordinate units.
A new primary unit is selected from the upgraded subordinates.
The firmware is upgraded on the former primary unit.
Primary unit selection occurs, according to the standard primary unit selection process.
If all of the subordinate units crash or otherwise stop responding during the upgrade process, the primary unit will continue to operate normally, and will not be upgraded until at least one subordinate rejoins the cluster.
The Fortinet Security Fabric brings together the concepts of convergence and consolidation to provide comprehensive cybersecurity protection for all users, devices, and applications and across all network edges.