A small provider leaked routes it did not own.
How it spread
Verizon accepted them and propagated them. Cloudflare, Facebook, Google, and much more of the network got pulled into the mistake.
Upstream filtering has to be real, not assumed.
BGP Route Leak · June 2019
A small provider leaked routes it did not own.
Verizon accepted them and propagated them. Cloudflare, Facebook, Google, and much more of the network got pulled into the mistake.
Upstream filtering has to be real, not assumed.