I have two MacBook Pros and a Cisco RV110W wireless router.
I have created a VLAN with all ports untagged and I linked this VLAN to a Wi-Fi with the option "Wireless Isolation with SSID" on.
From both MacBooks I can successfully connect to the Wi-Fi (previously created) and if I try to ping between them, they can't see each other, which is something I'm happy with.
The problem occurred when I saw in Finder the name of the other MacBook Pro (this has screen sharing (VNC) enabled), so I clicked on it and then provided the credentials, and I was able to connect to the other MacBook Pro, which I thought was not possible due to the Isolation option I enabled in the router.
First Question: How is it possible they can see each other, if pinging between them showed me that they can't communicate with one another, and the Wi-Fi VLAN has isolation enabled?
Second Question: Is Bonjour enabling the communication between them?
Third Question: How can I truly isolate both MacBooks using this router?