@Somnus In my case this is VDSL2 SFP module. It require force setup 1G / Full duplex. Otherwise it will not be recognized properly in SFP slot.

@Danielst I have the same problem but looks like no one read or reply. I need same fixed settings for SFP module slot.

Hi, I bought TL-ER7206 and found, some of my SFP modules are not working. The router tried to negotiate with modules (SFP LED is ON for 3-4 seconds) but later modules are not recognized. It looks...