Verizon and a BGP Optimizer Knocked Large Parts of the Internet Offline

An Internet Service Provider in Pennsylvania  (AS33154 – DQE Communications) was using a BGP optimizer in their network, which meant there were a lot of more specific routes in their network. However, against numerous best practices outlined below, Verizon’s lack of filtering turned this into a major incident that affected many Internet services such as Amazon, Fastly,  Linode and Cloudflare. What this means is that suddenly Verizon, Allegheny, and DQE had to deal with a stampede of Internet users trying to access those services through their network.

Source: blog.cloudflare.com