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Google Cloud Status Dashboard
"While removing a faulty router from service, a new procedure for diverting traffic from the router was used. This procedure applied a new configuration that resulted in announcing some Google Cloud Platform IP addresses from a single point of presence in the southwestern US. As these announcements were highly specific they took precedence over the normal routes to Google's network and caused a substantial proportion of traffic for the affected network ranges to be directed to this one point of presence. This misrouting directly caused the additional latency some customers experienced.

Additionally this misconfiguration sent affected traffic to next-generation infrastructure that was undergoing testing. This new infrastructure was not yet configured to handle Cloud Platform traffic and applied an overly-restrictive packet filter."
postmortem  google 
august 2016 by peakscale
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