I am trying to disable 802.11n access to the guest WLAN (SSID "open"). I tried to configure the WLAN with 802.11g access only but "n" clients are still able to connect. I'm extremely green when it comes to wireless config so I'm way out of my element here. I've attached a picture of what I thought should have done the trick. Any suggestions?
What you can do is go to your WLAN SSID and under the QoS feature, disable WMM. WMM is required for 802.11N support... Test is out and hopefully that solves your issue.