BGP Stuck Routes Operational Experience Survey

[Iliana Xygkou via NANOG <nanog () lists nanog org>]

Dear NANOG community members,

We are researchers from Georgia Tech investigating the phenomenon of BGP stuck routes (also known as "zombie 
routes")—prefixes that persist in routing tables despite being withdrawn by their origin AS.
While recent research using BGP beacons (including our work presented at IMC 2025 [1]) confirms that zombie routes 
occur regularly and can persist for long periods, there is a gap in understanding the operational reality of this 
issue. We observe the data, but we need to hear from operators to understand the real-world impact and their mitigation 
responses.

We invite you to participate in a brief, anonymous survey to help us assess the extent and impact of this phenomenon in 
operational settings and to identify common practices for mitigating it.
Survey Link: https://forms.office.com/r/9BuWqN0n0J
Privacy & Data Usage: This survey is anonymous. We are not collecting any PII (Personally Identifiable Information) 
data. 

Thank you for your time and for your contributions to this Internet measurement study.

[1] I. Xygkou, A. Chariton, X. Dimitropoulos, and A. Dainotti. "A First Look into Long-lived BGP Zombies". IMC '25. 
https://doi.org/10.1145/3730567.3764469

Best regards,
Iliana Xygkou
PhD student
Georgia Institute of Technology
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