Troubleshooting Tip: Cannot add interface to software switch

[dbhavsar]

Description	This article describes the solution to an issue where it is not possible to add an interface in the software switch.
Scope	FortiGate.
Solution	Below are the things to check first before adding the interface: The interface should have 0 references. The device detection should be disabled and the role should be defined. The IP should be '0.0.0.0/0' on the interface to add or it will not be listed to add. As visible when the interface has an IP address defined, the option to add that interface is not listed: CLI: config system switch-interface     edit VLAN-Switch     new entry 'VLAN-Switch' added         set vdom root   set member         *interface-name Physical interface name.         port2 interface         port4 interface         port5 interface         port6 interface         port7 interface         port8 interface         port9 interface         port10 interface         set member port3 entry not found in datasource value parse error before 'port3' Command fail. Return code -3 end The solution is to remove the IP address and to remove the role defined. Once processed, an option to add that interface appears: CLI: config system switch-interface edit VLAN-Switch new entry 'VLAN-Switch' added set vdom root set member *interface-name Physical interface name. port2 interface port3 interface port4 interface port5 interface port6 interface port7 interface port8 interface port9 interface port10 interface set member port3 end show system switch-interface config system switch-interface     edit "VLAN-Switch"         set vdom "root"         set member "port3"     next end Related article: Technical Tip: Cannot use interface to software switch with no settings