claude-memory/graph/solutions/matter-commissioning-requires-same-subnet-connectivity-1c76d0.md
Cal Corum b140d4d82a migrate: 313 memories from MemoryGraph
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id type title tags importance confidence created updated
1c76d0b9-c94a-44ae-af52-372eb94ebedd solution Matter commissioning requires same-subnet connectivity
home-assistant
matter
thread
networking
proxmox
troubleshooting
0.9 0.8 2026-01-09T06:55:57.244262+00:00 2026-01-09T06:55:57.244262+00:00

Home Assistant Matter Server must be on the same subnet as IoT devices for mDNS discovery and commissioning to work. If HA is on a server VLAN (10.10.0.x) and devices on home network (10.0.0.x), commissioning fails with 'Discovery timed out' errors. Solution: Add second NIC to VM on IoT network and make it net0 (primary) since Matter Server auto-selects first interface. Proxmox config: net0 on vmbr1 (home), net1 on vmbr0 (server).