SFP+ Module compatibility

Hello @andej ,

If you are sure that SFP is compatible with Fortigate and Switch, you can try to change the interface speed. Generally, problems are solved this way.

config system interface edit <interface-name> set speed <1000full/10000half/100full/100half/10full/10half/auto> end

https://community.fortinet.com/t5/FortiGate/Troubleshooting-Tip-Verify-FortiGate-Configuration-for-SFP/ta-p/194757

Hello  @andej ,

Thank you for contacting the Fortinet Forum portal.

As @ozkanaltas  mentioned, most problems would be compatibility of the SPF or speed.

please refer below links to verify the transceiver on fortiswitch and fortigate and to adjust the speed.

https://community.fortinet.com/t5/FortiGate/Technical-Note-How-to-check-SFP-transceiver-module-serial-number/ta-p/194318

https://community.fortinet.com/t5/FortiGate/Troubleshooting-Tip-Verify-FortiGate-Configuration-for-SFP/ta-p/194757

https://community.fortinet.com/t5/FortiSwitch/Troubleshooting-Tip-Resolving-issues-with-non-functional/ta-p/276502

https://community.fortinet.com/t5/FortiSwitch/Troubleshooting-Tip-SFP-SFP-transceivers-port-fiber-link-is-not/ta-p/193940

Best regards,

Manasa.

If you feel the above steps helped resolve the issue, mark the reply as solved so that other customers can get it easily while searching for similar scenarios.

In my experience I got over 90% of third party SFP(+) working on Fortinet devices, so you shouldn't have an issue with compatibility, just make sure both ends are of the same type (i.e: both short wave, or both long wave) and use the right cable.

On the other hand I think Fortinet may not support you in case you have any related issue.