Pauldy's House of Geek

Multiple log entries similar to the following are caused by the homeassistant service receiving mdns across multiple interfaces. Those of us working across subnets and such will be susceptible to this. You may still want broadcasting of mdns across both broadcast domains so the best way to handle this is to block homeassistant from broadcasting across both as it already has an interface in each broadcast domain.

2025-03-29 00:24:49.309 homeassistant systemd-resolved[580]: Detected conflict on homeassistant601808.local IN A 10.x.x.x

Each device that handles the broadcasting of this information will be slightly different I use pfsense to manage this so in my case I simply add each interfaces ip address to the block list and it will prevent it from forwarding from those ips.