Notas del episodio
Route leaks — when a BGP announcement propagates beyond where it should, often black-holing traffic — have historically been guarded by hand-written operator filters. Jordan and Riley walk through how RFC 9234 moves that protection into the protocol itself, using the BGP Role capability (neighbors negotiate provider/customer/peer up front) and the Only-to-Customer (OTC) attribute (routes get stamped so compliant routers auto-reject leaked ones), enforcing "valley-free" routing automatically. The catch from Cloudflare's real-world measurement: some large Tier-1 networks strip the OTC attribute as they forward routes, undermining protection for everyone downstream — a classic internet collective-action problem where the safety property only fully holds if the backbone cooperates. Source: BGP Role model: tracking the adoption of RFC 9234 — The Cloudflare Blog, Aug 18 2026 — https://blog.cloudflare.com/rfc9234-bgp-role-model/ This is commentary/summary in the hosts' own words, not a reproduction of the article.