Matter over Thread in a VLAN-aware network on HA OS in Proxmox with VyOS

Sat, 18 Jul 2026 22:41:45 +0200

Ikea ~recently released really nice sensors (home-assistant.io), for example the ALPSTUGA CO2 (holliger.me), an improved successor to the VINDSTYRKA (ikea.com). Unfortunately, the ALPSTUGA runs on Matter over Thread, so I wanted to check how I could migrate my network.

TL;DR: ¶

Read the HA Matter docs (home-assistant.io) & HA Thread docs (home-assistant.io)
Read the Openthread docs (openthread.io)
Read this guide (maxaller.name)
Enable IPv6 on your local network, set firewall correctly
Enable mDNS reflector between Thread/Matter server VLAN and client VLAN (set service mdns repeater interface 'br100.20'), for firewall rules realize that mDNS broadcast/multicast goes to local zone.
Ensure ha docker options --enable-ipv6=true is set on HA OS docker
Ensure accept_ra=2 and accept_ra_rt_info_max_plen=64 are set on proxmox / VyOS hosts (maybe only VyOS is enough)
Ensure you’re close enough to the Thread radio when testing
Ensure you like this kind of pain when setting up your VLAN-aware home network on proxmox/VyOS/HA OS.

Thread is a bitch ¶

Initially I thought this would take some reading up, an extra dongle, and then 10min of configuring. It turns out it was quite an IPv6 hell and took me hours to get working.

Thread on Tim's blah blah blah

Matter over Thread in a VLAN-aware network on HA OS in Proxmox with VyOS

TL;DR: ¶

Thread is a bitch ¶