The Architecture of the Internet with Erik Seidel

What It Covers

Erik Seidel from Cloudflare explains Internet architecture fundamentals including BGP routing protocol, peering versus transit relationships, anycast DDoS mitigation, China's unique networking challenges, and how Cloudflare's 300+ global data centers handle millions of requests per second.

Key Questions Answered

• •BGP Route Propagation: Border Gateway Protocol sessions between edge routers exchange IP prefix road maps constantly. Tier one networks see high dynamics as customer changes propagate upward, while small regional networks maintain stable sessions with minimal prefix updates throughout the day.
• •Anycast DDoS Defense: Cloudflare spreads single IP addresses across 10,000+ servers in hundreds of data centers globally. When botnets attack with 100+ terabits per second, traffic naturally disaggregates across locations, reducing each site to absorbable gigabit-level chunks that enable effective filtering without congestion.
• •China Network Architecture: Mainland China requires separate infrastructure partnerships with China Telecom, Unicom, or Mobile due to Great Firewall packet inspection overhead and mandatory local network transit. Cloudflare cannot operate its standard global backbone there, making China an enterprise-only service requiring special contracts.
• •Peering Economics: Tier one networks like AT&T, Telia, and NTT reach the entire Internet without paying anyone through settlement-free peering agreements. Smaller networks buy transit services for full Internet routing tables containing one million IPv4 prefixes, while strategic peering reduces latency and costs.