A closer look at a BGP anomaly in Venezuela

What this post added

This post analyzes a BGP route leak anomaly observed in Venezuela, attributing it to potential insufficient routing export and import policies by the ISP CANTV (AS8048). It explains BGP and route leaks, details the specific leak involving AS8048 redistributing routes from AS6762 to AS52320, and discusses the relationship between AS8048 and the originating network AS21980. The post contrasts the observed leak with potential malicious intent, suggesting configuration errors or network issues as more likely causes, and highlights the role of tools like Cloudflare Radar and BGPKIT's monocle in analyzing such events. It also touches upon RFC9234 and the Only-to-Customer (OTC) attribute as potential solutions for preventing route leaks.