https://www.bleepingcomputer.com/news/technology/facebook-outage-caused-by-faulty-routing-configuration-changes/ > Facebook says that yesterday's worldwide outage was caused by faulty configuration changes made to its backbone routers that brought all its services to a halt. > "Our engineering teams have learned that configuration changes on the backbone routers that coordinate network traffic between our data centers caused issues that interrupted this communication," said Santosh Janardhan, VP for Engineering and Infrastructure at Facebook.