The author describes building an automation to monitor IPv6 connectivity on an OpenWrt router after experiencing a prolonged undetected outage. The system uses Linux hotplug events on the wan6 interface, an ubus-based script that checks IPv6 address and prefix delegation status, and publishes results via MQTT to Home Assistant for alerting.
Background
IPv6 deployment is increasing globally, but connectivity issues such as prefix delegation failures or router misconfiguration can silently break IPv6 access without affecting IPv4. Many OpenWrt users lack visibility into IPv6 WAN health beyond basic ping tests.
- Source
- Lobsters
- Published
- Aug 30, 2026 at 09:24 PM
- Score
- 5.0 / 10