Troubleshooting Tip: QSFP port is not showing up

[rbarnes]

Description	This article describes a scenario when the QSFP is connected properly but the port is showing down.
Scope	FortiOS 7.2.
Solution	The Firmware version is 7.2.8. Verify if the port is up with the following commands. diag hardware device info nic <port> get sys interface transceiver Example: _duplex        :Full ==== Current Link Settings ===== auto-nego       :Disable s_status        :Up s_speed         :100000 s_duplex        :Full FEC             :CL91 (0x3) FEC_cap         :OFF,CL91,CL74 (0x1c) SerDes_if       :SR4 SerDes_if_cap   :SR4,LR4,CR4 (0xe00) SerDes_dflt     :9 pm_mode_setting :0 pm_mode         :0x0 pm_mode_dflt    :0 pm_port         :No medium_mode     :0 ==== Link Status =============== Admin           :Up link_status     :Down Speed           :N/A Duplex          :N/A It is necessary to disable the Forward Error Correction in some cases. Note: Only set this if the interface does not connect. set forward error correction to disable config system interface    edit <port>        set forward-error-correction disable        set speed 100000full ß I also force the speed to 10000full  end Another tip is to plug it into 2 ports on the same FortiGate to verify it is working.