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By default, ULL ports are configured as 10G. If these settings is changed, this will cause a reboot to the FortiGate.
In High Availability scenario, changing this setting will cause a reboot of the entire cluster.
FG6H0F-3 # show full-configuration system npu | grep ull
set ull-port-mode 10G
FG6H0F-3 # config system npu
FG6H0F-3 (npu) # set ull-port-mode 25G
FG6H0F-3 (npu) # end
NP7 ULL port mode speed change will take effect after system reboot, and then override the speed setting under related ULL ports.
Do you want to continue? (y/n)y
After continuing, the reboot of Primary FortiGate will occur and since the config gets synced to Secondary FortiGate, this will also end up rebooting the Secondary FortiGate.
This change should only be implemented in a maintenance window.
If its important to avoid any interruptions that may be caused by cluster reboot, it is advised to break the cluster and perform the changes on each device individually to avoid any downtime.
Note:
If there is a mismatch for the ULL port settings between the primary and secondary FortiGates, the primary FortiGate will automatically reboot the secondary FortiGate to apply the ULL setting that is configured on the primary unit.
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