Originally the cable was thought you be cut, but this turned out to be an inaccurate statement when Telias posted their Twitter update stating they had an update gone bad. The more likely cause of the traffic was bad routing which can either send traffic the wrong way or have your data packets simply disappear into nothing.
The issue affect the UK, France, Germany, Italy and more. At one point during the issue CloudFlare reported that their traffic was being rerouted through Asia to get to the US. This re-routing caused connectivity issues for many of their clients. The impact was not as large as it could have been thanks to the fact that many companies use multiple carriers to ensure that no single line outage takes them down.
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