You sir are a champion. I've now got it working with my 887VA-W I did have the no ip igmp snooping but not the port-protected bit.

I too am having the same issue. I've managed to get it to connect to my wireless SSID using my phone to initially fake the SSID then switching my cisco back on and it successfully connects to my wireless & I can ping the Chromecast but it doesn't see...