Technical Tip: Unable to select interface when configuring HA Reserved Management Interface

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Description	This article describes that the interface is not shown when configuring HA Reserved Management Interface.
Scope	FortiGate.
Solution	For the example below, it is impossible to select port3 under the ha-mgmt-interface.                                       Check that port3 has been assigned to the DHCP server, remove the port3 if it is assigned:                     Check if the static route has been configured, remove the port3, or assign the static route to the other interface:                                                                        Check if the port3 is assigned to address remove the address or assigned to a different interface:                                                                       The port3 will be shown under the ha-mgmt-interface after removing from the DHCP server, static route, and the address:                                                                       Alternatively, may check if the interface is used as a reference via CLI: diagnose sys cmdb refcnt show system.interface.name port3 Related article: Technical Tip: How to Check Referenced Objects