Trouble adding first matter device. Error: Network is unreachable

[bigdvette]

Look towards bottom of this thread for some options you need in your matter server docker compose.

[SOLVED] IPv6, Docker, & Proxmox

I’d already set the accept._ra to 1, but after changing it to 2 in the Proxmox LXC and on the bridge and interface on the Proxmox host itself it worked! I hope anyone else who has these issues finds this thread. At least for the first light bulb I tried.