Hey everyone, I wanted to share my recent experience with integrating devices across different VLANs in my home setup. It was a bit of a challenge, but I managed to get everything working smoothly! Here’s how I did it. The Setup I have two VLANs in my network: one dedicated for IoT devices (192.168.2.xxx) and the other for general purposes (192.168.0.xxx). My Home Assistant (HA) system is running on an Intel NUC and is located on the IoT VLAN. However, I have some devices like Sonos speakers and Apple TVs on the general-purpose VLAN that I wanted to integrate with HA. The Challenge Initially, I faced issues where HA couldn’t discover or integrate devices on the general-purpose VLAN. Despite being able to ping these devices from HA using SSH, the integration attempts kept failing with the error message: ‘No devices found on the network.’ I double-checked my firewall settings and confirmed that there were no blocks on inter-VLAN communication using my Unifi UDM Pro. The Solution After some research and trial and error, I realized that the issue wasn’t with the network configuration itself but with how HA was handling device discovery across different subnets. Here’s what I did to fix it: 1. IP Configuration I made sure that both VLANs had proper IP addressing and that the default gateway for each VLAN was correctly set. This ensured that devices on one VLAN could communicate with devices on the other VLAN without any issues. 2. DNS and DHCP Settings I configured my Unifi UDM Pro to handle DNS and DHCP for both VLANs. This helped HA recognize devices on the general-purpose VLAN more effectively. 3. Custom Integration Scripts I wrote a small script to periodically scan both VLANs for new devices and update HA’s device list accordingly. This script runs every 15 minutes and has been instrumental in maintaining seamless integration. 4. Firewall Rules (Just in Case) Although my initial checks showed no firewall blocks, I revisited the settings to ensure that all necessary ports were open for HA to communicate with devices on both VLANs. The Result After implementing these steps, I was thrilled to see that HA could now successfully discover and integrate devices from both VLANs. The Sonos speakers and Apple TVs are now fully functional within my HA setup, and I can control them seamlessly from my dashboard. Tips for Others - Always double-check your network configuration, even if you think everything is set up correctly. - Consider writing custom scripts to automate device discovery and integration if you’re dealing with multiple subnets or VLANs. - Don’t hesitate to reach out to the community for advice if you’re stuck. There are plenty of knowledgeable users who are more than happy to help! I hope this guide helps someone else who’s struggling with similar issues. Happy integrating! 