I have Chromecast devices that connect to a Chrome_SSID(192.168.1.0/24). A guest user try's to cast to the device by first connecting to the Guest_SSID (172.17.0.0./16), - they are prompted to join the Guest_SSID, then navigate to a URL and enter a code to cast but this process is not working. Casting from phone connected to the Chrome_SSID works ok.
I have verified that Bridge mode is set on the Chrome_SSID and client isolation is also disabled. Both SSID's are getting their DHCP from upstream Velo device.
After some more troubleshooting and verifying setup requirements...
CC-Device successfully connects to SSID: CC-Device - obtains IP address from controller (VLAN 200). The SSID is setup in Bridge mode. When connecting to the same SSID (CC-Device)using my phone as a test one is able to cast successfully to the TV that the CC is plugged into. Connecting the same phone to the SSID :Guest Wifi (VLAN 900) however this does not work. Guest wifi is setup in L3 roaming mode. I cannot L3 ping from my phone on the Guest wifi to the controller on the CC-Device. Reviewing the FW rules I have 4 DENY statements on the Guest Wifi but nothing that would stop access to the CC-Device wifi.