Technical Tip: Can not select mgmt1 interface of FortiGate-6K under Management Interface Reservation

1. Go under Global -> Network -> Interfaces -> mgmt1 -> Ref.    Make sure that Ref. = 0. If Ref. is not zero, just select the number to show the related setting with mgmt1.

Delete all related settings with mgmt1 to make sure that Ref. = 0. Go under System -> HA -> Edit -> Management Interface Reservation -> Interface to select mgmt1 interface.

2. If the mgmt1 interface still does not show up after Global -> Network -> Interfaces -> mgmt1 -> Ref. = 0, check the setting with CLI commands as below:

config global

config load-balance setting

show

get

To check if mgmt1 is under slbc-mgmt-intf setting:

FortiGate-6000F (setting) # get

status              : enable

slbc-mgmt-intf      : mgmt1

Change mgmt1 to be the other interface such as mgmt2, following the CLI command:

config global

    config load-balance setting

        set slbc-mgmt-intf mgmt2

    end

end

Go under System -> HA -> Edit -> Management Interface Reservation -> Interface. It would be possible to select the mgmt1 interface.