We are having trouble with a video streaming application (Chromecast) that the manufacturer says the problem is likely AP/Client Isolation needs to be disabled.  I cannot find this in the configuration menus.Anyone know where/how to turn this off?

I have a 1720 router and I just want to do a few quick things to get it up and running. I do not know much IOS.I want to connect to the WAN address on the 4ESW card, and my LAN (192.168.1.0) on the Ethernet port.I would like to ensure there is some m...