Hi Joseph,
sorry to bring this point now to your notice that this is the lab set up i am in right now before get onto live network.
for guest users , controller is serving as DHCP. and for the guest VLAN the default gateway is same as the gateway set at controller.
I am sorry for my previous reply "ping to www.google.com" is not working. the controller is not in network yet.
I am under impression that, once i connect to guest WLAN, i should get an IP address in guest WLAN that is happening, able to connect guest WLAN without any authentication. then when i connect to google.com it should prompt me for captive portal and credentials for authentication that will get authorized from internal DB that we created. then it should disply the page cannot be displayed error. right?
but for me captive portal itself doesn't pop up, do i need to have internet connection for this to work? how can i test it in lab environment?