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H/W Ver. A2 F/W ver: 1.11 with update to 1.15Communicate means that Users of Guest SSID can PING and access local network or other Primary SSID users. There is no isolation between the GUEST and Primary SSID.
I did it like in this link http://www.dlink.cc/d-link-wireless/how-to-setup-multi-ssid-with-vlans-on-d-link-busines-class-access-point-dap-2553.htmlAnd after that, I couldn't connect to the DAP in any network (primary or guest) so I had to reset it and in that moment, GUEST users still access local network.If you can tell me what config should I make so the Primary SSID can access local network and Guest SSID only to have internet without local network access ....My DAP doesn't have DHCP enabled. IP's for users are obtained from the router in front of DAP.Thanks !