An Overview of Solutions to Avoid Persistent BGP Divergence

The Internet is a collection of multiple interconnected and self-administered domains, known as autonomous systems. In order to find a path from one autonomous system to any other autonomous system, neighboring autonomous systems exchange routing information via the Border Gateway Protocol (BGP). However, BGP suffers from several types of divergence anomalies. A divergence anomaly occurs when BGP routers permanently fail to obtain a stable path to reach a destination autonomous system. In this article, we discuss the different types of BGP divergence anomalies, along with their proposed solutions. I