Chromecast Setup
Some helpful resources for chromecast setup. The links are summarized below.
https://support.google.com/chromecast/answer/2998456?co=GENIE.Platform%3DDesktop&hl=en&oco=0
https://productforums.google.com/forum/#!topic/chromecast/ZGm4p8VcpAU
Set up essentials
What router settings do I need to setup Chromecast?
Make sure your router is within 10-15 feet of your Chromecast.
Enable: Universal Plug and Play (UPnP), multicast, Internet Group Management Protocol (IGMP)
Disable: AP/client isolation, virtual private networks (VPNs), proxy servers, IGMP Proxy
Please note, each router and its settings are a bit different. Contact your router manufacturer for details.
If you’re using a BT Hub, turn off the Smart Setup feature in the router settings and reset the Chromecast.
If you are still having problems check out the Chromecast Troubleshooter.