backward compatibility of 10G and 1G sfp port

https://www.fortinet.com/content/dam/fortinet/assets/data-sheets/pdf/fortigate-200g-series.pdf

The datasheet says “10/GE SFP/+”. That means both 10G SFP+ and GE SFP would work. You probably need to specifically configure the port manually though if it’s configured as 10G by default, which most likely. I just don’t have that model so I can’t confirm it myself. But you should be able to do that easily by yourself.

Toshi