Level 3 Issues Cause Outage for Comcast, Other ISPs → Route leak

Wired has posted an analysis of the outage: »www.wired.com/story/how- ··· -the-us/ which concludes that this was a route leak (happened before, likely will happen again).

Here's a bit more detail from Dyn on Level 3's "route leak":

Widespread impact caused by Level 3 BGP route leak
By Doug Madory, Dyn Research - November 7, 2017
»dyn.com/blog/widespread- ··· te-leak/