Unifi Chromecast VLAN setup

Feb 23, 2024 - 4 min read

Introduction

It is nowadays very easy to use the Chromecast within different networks/VLANs. All you have to do is make a few settings within the Unifi Network Application.

In my case I have configured the following networks:

IOT-VLAN (with a Nvidia Shield and a Chromecast Ultra)
CLIENT-VLAN (with devices casting to the Nvidia Shield and the Chromecast)

Setup

Enable multicast DNS

As a first step I have enabled Multicast DNS for the above mentioned networks.

Go to Settings and Networks
Within the Global Network Settings enable Multicast DNS and add the networks with devices which need to cast. For example:
- IOT-VLAN
- CLIENT-VLAN
And finally click Apply Changes

WiFi multicast management setup

I have created a WiFi network for both my IOT-VLAN and the CLIENT-VLAN network and set up multicast for each wifi network.

Go to Settings and WiFi
From the list at the top, open the WiFi network settings by clicking on the network
Advanced Configuration:
First select Manual.
- Required Client Device Isolation: Disabled
- Required Multicast Enhancement: Enabled
- Required Multicast and Broadcast Control: For the IOT-VLAN I added the MAC address of my wireless Chromecast to the list
Also make sure that the gateway (for example the UDM Pro) is added to the list.
And finally click Apply Changes

Troubleshooting

If casting doesn’t work you can temporarily add a client device to the IOT-VLAN. Then try again to see if the casting works, and if it does, then it could possibly be a problem with the firewall.

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