Wed Dec 19, 2018 4:45 pm
Bridge the VLANs, but then there may be no point using VLANs. Or you'll need to write a rule that can forward mDNS traffic as this is the protocol Chromecast uses for advertisement and control. Chromecast is not really intended to work outside of a simple LAN environment.
An alternative is to enable guest mode on the Chromecast, which then allows local control without the controlling device being on the network. Depending on your TV/speakers, and controlling device, the guest mode isn't perfect. I've had some phones or tablets not work with it well (poor quality microphones) and I've had some TVs with terrible speakers not work well unless they were turned up very loud. Also be aware of the background noise as this will cause a low SNR and make controlling difficult as well.
If the ultrasonic audio pairing doesn't work, you can usually use the PIN shown on-screen (or from the Home app, in the case of Chromecast Audio).
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