I've got a Matter hub (Dirigera from Ikea) which had been set up and has a motion sensor associated with it. It was integrated into HA, and reacting correctly. Now I moved the hub and it is now stuck as unavailable. Attempting to ping the device showed the IPv4 address, and the routable IPv6 address as reachable, but the link-local IPv6 was not. How can I convince HA to figure out the new IPs?
#Matter hub no longer reachable after rebooting
clear lantern
sly lodge
matter devices are discovered through mdns. When you "moved" the hub, did you do something that would mean it's no longer in the same network as home assistant?
the logs for the "matter server" add-on in home assistant might also have some useful information
clear lantern
Same network, different switch port. Dropping the matter hub and rejoining it to HA, and it’s not unavailable anymore. (Though I am considering moving it to a different VLAN)
sly lodge
don't do that :) the matter controller (home assistant) and thread border router (dirigera) must be on the same vlan for things to work correctly.
clear lantern
There’s a multicast dns forwarder between the two vlans. A not uncommon deployment scenario for IoT devices.