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Learn how to build prefix-level route leak detection systems for large-scale BGP networks in this 31-minute conference talk from NANOG. Discover Cloudflare's approach to detecting route leaks across their global network with complex peering relationships, where traditional AS-to-AS relationship analysis proves insufficient. Explore the implementation of a highly scalable pipeline that evaluates each prefix individually for path validity rather than relying on autonomous system relationships alone. Examine practical methods for capturing route leaks that other network operators can apply, particularly those running BGP Anycast networks. Understand Cloudflare's progress toward BGP ASPA (Autonomous System Provider Authorization) compliance and their strategy for leveraging RFC9234 Only-to-Customer (OTC) attributes as preventative measures alongside prefix-level detection systems.
