Global & US Outage Trends:
- Total global network outages varied weekly, peaking at 664 events (March 17–23) and dropping to 252 (June 16–22).
- U.S. outages followed similar swings, ranging from 25 to 106 ISP outages weekly, and cloud outages spiking up to 162 (March) then dropping sharply.
- ISP outages dominated, showing volatility but generally high frequency. Public cloud outages fluctuated more sharply. Collaboration app outages remained minimal and stable.
Notable Outages & Providers:
- Cogent Communications and Lumen (CenturyLink) appeared repeatedly as major outage sources, impacting wide regions and downstream partners.
- Other frequent names: GTT Communications, Hurricane Electric, Arelion (Telia Carrier), Microsoft, Amazon, Cloudflare, Neustar.
- Outages ranged from minutes to hours, often showing fluctuating node failures before full recovery.
Key Incident Highlights:
- June 17: Hurricane Electric outage (~18 min) centered in Dallas, impacting many US customers.
- June 20: Cogent outage (~1h 12m) with nodes affected in London, Paris, and beyond.
- April 16: Zoom suffered a ~2-hour global DNS-related outage.
- March 20-21: Lumen and Cogent outages lasting nearly an hour each across multiple continents.
- Dec 30: Neustar outage lasting 1h 40m across US and international nodes.
Impact Insights:
- Outages commonly cause cascading disruptions affecting multiple service providers and users globally.
- Recovery typically gradual as individual nodes clear issues.
- Major transit providers remain critical points of vulnerability.
Implications for Enterprises:
- Expect intermittent ISP and cloud network disruptions globally.
- Monitor key transit providers (Cogent, Lumen, GTT) closely due to their wide-reaching impacts.
- Collaboration apps show solid resilience but still require ongoing vigilance.
- Prepare redundancy and mitigation strategies, especially for critical regions like Dallas, Ashburn, London, San Jose.
