一个对Facebook网络问题的观察,看来root cause不是DNS的问题。观察到在出事前Facebook有 a rogue set of BGP withdrawals
mikesmith(老猫)
On October 4, 2021, Facebook experienced a prolonged outage preventing users from around the globe from reaching its services. The following is an analysis of the outage, which was updated periodically as we had more information to share.