It's not yet clear how or why, but Facebook's routers essentially sent a message to the internet announcing that the company's servers no longer existed. In the same way that air traffic controllers sometimes make changes to flight schedules, "Facebook did an update of these routes," Slim said.īut this update contained a crucial error.
Sami Slim of data centre company Telehouse compared BGP to "the internet equivalent of air traffic control". In an apologetic blog post, Santosh Janardhan, Facebook's vice president of infrastructure, said that "configuration changes on the backbone routers that coordinate network traffic between our data centres caused issues that interrupted this communication".Ĭyber experts think the problem boils down to something called BGP, or Border Gateway Protocol - the system the internet uses to pick the quickest route to move packets of information around.
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