> "Our engineering teams have learned that configuration changes on the backbone routers that coordinate network traffic between our data centers caused issues

> "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. " and > "... its root cause was a faulty configuration change on our end." From https://engineering.fb.com/2021/10/04/networking-traffic/outage/ https://engineering.fb.com/2021/10/04/networking-traffic/out...