Re: BGP Stuck Routes Operational Experience Survey

[Bryton Herdes via NANOG <nanog () lists nanog org>]

Thanks for sharing the survey.

In addition to responding, I thought I'd share a blog we wrote late last
year detailing our operational experience with stuck routing:
https://blog.cloudflare.com/going-bgp-zombie-hunting/

--
Bryton Herdes
Principal Network Engineer
AS13335 - Cloudflare


On Mon, Apr 6, 2026 at 5:02 PM Iliana Xygkou via NANOG <
nanog () lists nanog org> wrote:

> 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 routing tables despite being withdrawn by their origin AS.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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>
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