Uploaded February 2026 | Updated September 2026, 1 week ago
Abstract
Routing loops, blackholing, and persistent reachability issues continue to plague networks worldwide. Our previous research identified BGP Stuck Routes, also known as BGP Zombies, as a significant contributing factor. These are routes that unexpectedly persist in the global routing table long after they should have been withdrawn, creating cascading operational problems. Building on our earlier work, we are introducing an enhanced detection method, BGP Clock, and Stuck Route Observatory, the automated tool, providing operators the ability to check within seconds if Autonomous Systems are affected by, or worse, causing the problem.
Kemal Sanjta:
Kemal is a result-oriented engineer focusing on designing, operating and troubleshooting large-scale networks. Passionate Linux user with a deep understanding of SRE/NRE practices. Over the last two decades, he worked at several large-scale companies applying NRE practices and automating remediation actions. As a Principal Internet Analyst at ThousandEyes, he focuses on research and providing deep and meaningful insights into outages through the lenses of ThousandEyes.
nanog.org/events/nanog-96/content/5599
Abstract
Routing loops, blackholing, and persistent reachability issues continue to plague networks worldwide. Our previous research identified BGP Stuck Routes, also known as BGP Zombies, as a significant contributing factor. These are routes that unexpectedly persist in the global routing table long after they should have been withdrawn, creating cascading operational problems. Building on our earlier work, we are introducing an enhanced detection method, BGP Clock, and Stuck Route Observatory, the automated tool, providing operators the ability to check within seconds if Autonomous Systems are affected by, or worse, causing the problem.
Kemal Sanjta:
Kemal is a result-oriented engineer focusing on designing, operating and troubleshooting large-scale networks. Passionate Linux user with a deep understanding of SRE/NRE practices. Over the last two decades, he worked at several large-scale companies applying NRE practices and automating remediation actions. As a Principal Internet Analyst at ThousandEyes, he focuses on research and providing deep and meaningful insights into outages through the lenses of ThousandEyes.
nanog.org/events/nanog-96/content/5599
