@Hank21 My network topology: ISP --- SM Fiber ~150m --- ES210X-M2 --- LAN What I mean is that the SFP modules work when I test them in a media converter, but not when they are plugged into the...

NOTE: Actual model is ES210X-M2, but I am unable to select it I am experiencing severe packet loss (~95%) when using 1G SFP modules in the SFP+ ports in the ES210X-M2 switch. Tested SFP Modules:...