Technical Tip: FN-TRAN-GC SFP copper 1G always shows up/up despite nothing being connected on the port

[laltuzar]

Description

This article describes that there is a limitation for FN-TRAN-GC SFPs. When installed on a FortiSwitch, the status is always shown as up/up.

The traffic flows and there is no impact reported, however, the management is impossible as it would not show when the fiber or copper has issues.

Scope

SFP FN-TRAN-GC.

Solution

For this, SFP needs to configure the speed of the port at 1000auto.

Check the FortiSwitch Compatible Transceivers.

Commands to configure the speed of the port.

FortiSwitch managed by FortiOS:

config switch-controller managed-switch

    edit <FortiSwitch_serial_number>

        config ports

            edit <port_name>

                set speed 1000auto

             end

          end

       end

    end

Related document:

Configuring port speed and status