Telstra outage: The night a network decided the year was 2006
Summary
The Telstra outage in 2026 was caused by a mismanaged time synchronization architecture, where a GPS-derived reference promoted a single server to top priority, enabling timing loops and cascading failures across mobile networks and dependent services. The article explains NTP strata, failure modes, and essential lessons: document configurations, maintain redundant independent time sources, monitor timing as critical infrastructure, and ensure firmware updates and governance are in place.