About

BGP communities are widely used by network operators to express routing policy, yet their operational use, visibility, and interpretation remain only partially understood.

Communities in the Wild brings together network operators, Internet measurement researchers, and tool developers to discuss operational practice, measurement methodologies, observability, validation, and emerging research directions related to BGP communities.

The workshop will combine invited presentations with moderated discussions and community exchange. Its goal is to strengthen collaboration between the operational routing and Internet measurement communities, identify open measurement challenges, and help shape future research and operational practice.

Community & Outcomes

A central goal of the workshop is to build a “community of communities” around BGP communities, connecting the operational, research, measurement, and tooling communities that create, observe, interpret, and use them.

As a concrete outcome, we anticipate preparing a publicly available workshop report, potentially suitable for submission to ACM CCR. The report would document current practices, known limitations, open challenges, and areas of consensus and disagreement, providing a durable reference point for the community.

News

Program

The program below is preliminary and subject to minor changes.

Time Activity
13:30–13:40 Welcome
Introduction to the workshop and its goals.
13:40–14:50 Session I: Operational Practice
Perspectives on how BGP communities are used in operational networks, including internal workflows, interconnection, policy signaling, and operational challenges.
  • Romain Fontugne (IIJ) — ISP community workflows; internal vs external use; what researchers cannot observe
  • Marcel Flores (Netflix) — CDN community usage; internal vs externally visible semantics
  • Vasileios Giotsas (Cloudflare) — CDN community usage; operational lessons
  • Pascal Hennen (DE-CIX) — RPKI validation communities; update churn; global routing impact
Followed by discussion.
14:50–15:15 Coffee break
15:15–16:35 Session II: Measurement, Interpretation, and Emerging Applications
Perspectives on observing, interpreting, validating, and making new uses of BGP communities.
  • Italo Cunha (UFMG) — Controlled community experiments; PEERING as ground truth; auditing community semantics
  • Cristel Pelsser (UCLouvain) — Community visibility at bgproutes.io
  • Ties de Kock (RIPE NCC) — RIPEstat; YANG model; geo-community / collector-location analysis
  • Yixin Sun (UVA) — Automatic community dictionary creation using LLMs
  • Kevin Vermeulen (École Polytechnique) — BGP hijacks at IXPs; malformed community usage and security implications
  • Oliver Hohlfeld (University of Kassel) — LARS; route-server community-processing overhead; scalability
Followed by discussion.
16:35–17:00 Open Discussion
Toward a BGP Communities "State of the Union": current practice, open challenges, research opportunities, and community priorities.
17:00– Biergarten (optional)
For anyone still willing to discuss BGP communities after half a day, we'll continue the conversation at a nearby Biergarten. The first beer is on Thomas. 🍺

Speakers

Participation

The workshop welcomes anyone interested in BGP communities. Participants are welcome to attend the talks, join the discussions, and contribute their own perspectives.

Registration

Attendance is handled through the standard ACM IMC 2026 registration process. Participants may register for the workshops only; registration for the main conference is not required to attend the BGP Communities Workshop.

Venue

The workshop will take place at KIT, Building 40.50, in Karlsruhe, Germany, on Monday, October 12, 2026.

Organizers

Thomas Krenc IIJ Research Lab
tkrenc@iij.ad.jp
Robert Beverly San Diego State University
rbeverly@sdsu.edu

If you have questions about the workshop, please feel free to contact either of the organizers.