This sudden influx of traffic is what makes or breaks an ISP or DNS provider. So what happened with Comcast? Essentially, their failover systems failed because the back-up servers couldn’t handle the abnormal weight of traffic. However when the servers that process these requests fail, queries have to be rerouted to other servers in the region. Internet Service Providers (ISP) like Comcast do this work for you so no one has to memorize those long 10 digit IP addresses. “traffic shifted in an unexpected way and overloaded local DNS server capacity.”ĭNS is the backbone of the internet, routing IP addresses (like computer phone numbers) to their designated domain name. A hardware failure unplugs portions of the West Coast during peak evening hours, reports Comcast on their corporate site.Ī downed piece of hardware at one of Comcast’s California hubs failed, toppling their redundancy system by a flood of rerouted data.
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