If scanner and laptop are in different switches, laptop can't connect to scanner. If on the contrary, scanner and laptop are connected in the same switch laptop can connect to scanner. I have two swithes MS225-48LT firmware MS 11.31, they have an uplink in trunk with the same vlans id, no acls. Laptop and scanner connected to ports in the same vlan in access mode, no rstp, no isolation.
If Windows 10 Firewall block the connection with scanner, when I connect both, scanner and laptop in the same switch, firewall should block also, and in the same switch it's working. Thanks for your help.