@MR.S You're absolutely right! :) On port 6 I have VLANs but when I've changed trunk port to SFP I forgot to set VLANs to trunk. Thank You :) I'm using software controller.

I have ER706W-4G gateway and SG2210MP switch. I connected it over SFP ports and optical fiber. Communication is fine (physical link, ping, etc.) except communication between native VLAN1 and other...