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 VLANs. The same config thru ethernet port works fine - physcial link, VLANs communication. I've double checked config of SFP and ethernet ports - it's the same. There is no firewall/ACL rules blocking communication.  

Any ideas? :)

Thanks