This article describes how to solve the FortiSwitch configuration sync error by modifying settings.
Scope
FortiOS 7.4.4, 7.6.0.
Solution
After FortiGate upgraded the firmware to 7.4.4 and 7.6.0 with FortiSwtich compatible version 7.4.3 and 7.6.0, the configuration will not able to be synced when modifying the setting on FortiGate GUI (example: shutdown interface, change Native VLAN on an interface).
The configuration synchronization without problem by modifying settings under the FortiGate CLI console.
The command and result below can be verified to see if they match the issue.
Run the command below in the FortiGate CLI console:
execute switch-controller get-sync-status all
Checking if the console displays the result below:
REST API login failed with error 60
The issue can be resolved without sync error by changing the tunnel mode from strict to moderate.
config switch-controller system set tunnel-mode moderate end