I set the Wifi with the SSID Isolation, like the attached image. Then I connect a laptop to the "isolated" Wifi but I can Ping the machines in the Lan, so the Isolation don't work.

  @Hendrix81 

 

 

SSID Isolation is just that, it isolates the particular SSID from the other SSIDs.  It is not client isolation.  It's really meant to be used with VLANs.

In others Firmware the "SSID Isolation" is called "Guest Network". I've a LAN with 192.168.1.x ip class. On the TP-Link EAP110 I will be to create two WIFI Network one private with the access to 192.168.1.x (Client, Printer, Server ecc...) and one Public Wifi Network (Guest Network) Isolated to the Private Network, with only access to Internet. Is it possible with EAP110?

SSID Isolation only prevents clients connected to that AP on the same SSID from talking to each other, it does NOT prevent clients from talking to devices reached via the APs Ethernet ports, or even other SSIDs using the same VLAN on that same AP.

 

See https://www.tp-link.com/us/support/faq/1060/

"4. If you want to Block the communication between wireless clients which connected with same SSID of same AP, please enable SSID Isolation function (block the communication between wireless clients which are connected to a same SSID of a same AP) at Wireless Settings->Basic Wireless Setting->Edit SSID"