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docs: HA VM lost IPv4 — root cause of months-long TV outage; pinned .146

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Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
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Mortdecai
2026-10-22 22:57:45 -04:00
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DECISIONS.md
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@@ -47,6 +47,8 @@ Format: `YYYY-MM-DD: <decision> — <why>`
*not* part of smart-home linking — don't touch it (shared project runs WP Mail SMTP).
Full detail + security-cleanup list in `.claude/handoffs/2026-06-06-*.md`.
- 2026-10-22: HA VM 706 pinned to 192.168.0.146 twice over — Omada DHCP reservation (MAC BC:24:11:3F:DC:7B) AND HAOS static IPv4 (`ha network update enp0s18 --ipv4-method static`) — HA had silently lost its IPv4 lease (~Aug 2026; IPv6-only, uptime 57d), cutting it off from MQTT/Caddy/Google: the "TV hasn't worked in months" outage. Static removes the DHCP dependency; reservation keeps the router from handing .146 to anyone else.
## Deferred / Rejected
- **DHCP reservation for the TV (static IP):** not done — Pi-hole doesn't run
DHCP (router does), so it's Seth's action on the router. The cached-IP probe