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8th October 2021
10:47am BST

Billions of Facebook users worldwide were unable to get online on Monday evening.
Cloudflare explained the outage simply as if "someone had pulled the cables from their data centres all at once and disconnected them from the internet".
https://www.instagram.com/p/CUpz4ZyorLP/
Facebook's explanation was a little more complicated: "Configuration changes on the backbone routers that co-ordinate network traffic between our data centres caused issues that interrupted this communication". This had a "cascading effect... bringing our services to a halt".
Downdetector, which tracks outages, said some 10.6 million problems were reported around the world - the largest number ever recorded, the BBC reported.