Greetings Routing Working Group members,
Our next meeting will be April 21st at 8pm US eastern time.
Zoom Room: https://iu.zoom.us/my/addlema
Dale Carder from ESnet will present on Autonomous System Provider Authorization (ASPA) and we will have time for discussion afterwards.
Thanks to our presenter and we look forward to seeing everyone in April!
Greetings Routing Working Group members,
Our next meeting will be April 21st at 8pm US eastern time.
Zoom Room: https://iu.zoom.us/my/addlema
Dale Carder from ESnet will present on Autonomous System Provider Authorization (ASPA) and we will have time for discussion afterwards.
Thanks to our presenter and we look forward to seeing everyone in April!
**[This is in development. Suggestions or corrections are welcome!]**
# R&E Global LPP Report
The attached HTML file is a self-contained, interactive copy of the
report. Open it in any modern web browser to explore the full tree with
search, sort, and expand/collapse controls.
## What this report shows
The global R&E network consists of roughly 2,700 separate networks
(autonomous systems). A significant percentage of these networks have
connections to both an upstream R&E provider and one or more commodity
ISPs. Each network independently decides which path to prefer when
routing traffic to various destinations.
Campuses typically connect to a regional R&E network (e.g., MERIT,
LEARN, CENIC, NYSERNet), which in turn connects to Internet2. The R&E
route between two campuses is often at least 4 AS hops. If both campuses
use the same commodity ISP — which happens frequently — the
commodity route might only be 2 hops. Without an explicit routing
policy, BGP selects the shortest AS path, and the two campuses will
route via the commodity ISP instead of the R&E network.
The recommended best practice is to use **BGP Local Preference** to
prefer routes learned from R&E networks over routes learned from
commodity ISPs. When this is done, campuses route via the R&E path
regardless of AS-path length.
This report visualizes routing preference data for all 2,700 R&E
networks, organized as an AS-path tree rooted at Internet2 (AS 11537).
## How the probe works
The Local Preference Probe (LPP) is a server connected to both the
Internet2 R&E network and a commodity ISP. It sends probes from two
source addresses to hosts across the R&E networks and observes how each
network routes its response back — does it arrive via the R&E path or
the commodity path?
| Source | Address | Route design |
|--------|---------|-------------|
| Source A | `163.253.64.1` | R&E route is prepended towards commodity |
| Source B | `163.253.63.63` | R&E route is prepended towards R&E |
Both sources share the same commodity route. The difference is which
direction the R&E route is prepended, so the two probes test whether the
remote network chooses based on Local Preference or AS-path length.
## Reading the results
Each network in the tree has a stacked bar showing three categories:
| Color | Source A return | Source B return | Meaning |
|-------|----------------|-----------------|---------|
| **Green (RE)** | R&E | R&E | The network follows the best practice of
preferring R&E routes over commodity. BGP Local Preference favors R&E. |
| **Orange (Path)** | R&E | Commodity | The network uses AS-path length
to choose, so some destinations use R&E while others route via
commodity. R&E and commodity have equal Local Preference. |
| **Red (Comm)** | Commodity | Commodity | The network appears to always
prefer commodity, even when an R&E route exists. |
Probes that are inconclusive (missing or unexpected return pattern) are
excluded from the percentages.
**Orange and red networks are connected to the global R&E network
infrastructure, but are not effectively using it.**
## Customer cone percentages
The stacked bar for each AS represents its **customer cone** — the AS
itself plus every AS downstream of it in the R&E tree:
- Each probed destination IP is classified as RE, Comm, or Path.
- Counts are summed across the entire cone: the AS's own prefixes plus
all downstream prefixes.
- The three bar segments show each category's share of the cone total,
summing to 100%.
A leaf AS shows only its own results. A transit AS near the root
aggregates results across hundreds of downstream networks.
## Navigating the report
- **Expand/Collapse:** Click any AS row to expand or collapse its
children. Use the "Expand all" and "Collapse all" buttons for bulk
control.
- **Search:** Type an AS number or name in the search box to highlight
matches and auto-expand their location in the tree.
- **Sort:** Click the RE, Comm, Path, or Pfx column headers to sort
children within each expanded subtree. Click again to reverse direction,
a third time to reset.
- **Prefixes:** Click the "N pfx" link on any AS to see its originated
prefixes. Each prefix links to the per-prefix probe tool.
- **Duplicates:** An AS that appears under multiple parents is fully
rendered only once. Subsequent appearances show a "see above" link that
scrolls to the first occurrence.
- **AS names:** Toggle between names and holder names using the "Show AS
holder" button.
## Data sources
| Source | Used for |
|--------|----------|
| [RouteViews](https://www.routeviews.org/) | BGP AS paths and prefix
origin data for R&E prefixes |
| [RIPE Stat](https://stat.ripe.net/) | AS names and holder information
|
| [CAIDA AS
Organizations](https://www.caida.org/catalog/datasets/as-organizations/)
| Fallback AS name data |
| lpp-store | Historical LPP probe results used to compute cone
percentages |
In the future, the report will be rebuilt daily at UTC midnight.
## Project
This report is part of the
[CICI-ROOTBEER](https://www.caida.org/funding/cici-rootbeer/) project.
Steven Wallace
Director - Routing Integrity
Internet2
ssw(a)internet2.edu
Hi Routing Working Group,
Please send this out to your community.
Brenna Meade
Internet2
bmeade(a)internet2.edu<mailto:meadeb@internet2.edu>
________________________________
From: Jeronimo Bezerra <jbezerra(a)supercomputing.org>
Sent: Wednesday, March 18, 2026 9:20 AM
To: jet(a)nitrd.gov <jet(a)nitrd.gov>; all(a)lists.gna-g.net <all(a)lists.gna-g.net>; cybinf-engr(a)es.net <cybinf-engr(a)es.net>; scinet(a)scinet.supercomputing.org <scinet(a)scinet.supercomputing.org>; nre-experimenters(a)scinet.supercomputing.org <nre-experimenters(a)scinet.supercomputing.org>
Cc: mgmt26(a)scinet.supercomputing.org <mgmt26(a)scinet.supercomputing.org>
Subject: [mgmt26] Supercomputing 2026 NRE Call for Participation
SC26 Network Research Exhibitions (NRE) – Call for Participation
We are excited to look ahead to SC26 in Chicago, IL, and the time has arrived to submit proposals for the Network Research Exhibition (NRE) program.
The NRE represents the experimental research frontier of SCinet, providing a production-scale, high-performance networking environment to support advanced demonstrations in networking, distributed systems, data-intensive science, HPC, and AI. Researchers and professionals from academia, government, laboratories, and industry are invited to propose experiments and demonstrations that leverage SCinet’s world-class infrastructure during the SC Conference.
Researchers and professionals from government, academia, research institutions, and industry are invited to propose demonstrations and experiments that leverage SCinet’s world-class infrastructure during the SuperComputing Conference.
SC26 Focus Areas
For SC26, the SCinet team aims to make research and experimentation more impactful and locally connected. With Chicago as our host city, we encourage proposals that engage with themes relevant to the region and its communities, including:
* FinTech innovations, such as high-frequency trading, real-time analytics, and ultra–low-latency networking, by examining the performance and scale required for these data-intensive workloads
* Quantum computing and quantum networking demonstrations
* Healthcare and biomedical research applications, with emphasis on data-intensive cancer research
* Community-engaged research leveraging advanced networking infrastructure
We invite researchers to utilize the SCinet network and cluster environment to showcase forward-looking technologies and transformative research workflows.
Core High-Performance Networking Themes
At the same time, we remain committed to SCinet’s foundational mission. Proposals demonstrating:
* Emerging network hardware and architectures
* Advanced protocols and transport mechanisms
* Network-intensive scientific workflows
* High-performance networking innovations
* HPC- and AI-driven distributed applications
are strongly encouraged.
Engage With the NRE Team
The NRE team is available for one-on-one consultations to help refine ideas and determine infrastructure feasibility. If you are unsure whether your research could benefit from what is arguably the fastest temporary network infrastructure in the world, we encourage you to reach out and schedule a session: nre(a)scinet.supercomputing.org <mailto:nre@scinet.supercomputing.org>
For additional details, visit the NRE information page:
https://sc26.supercomputing.org/scinet/network-research-exhibition/
We look forward to collaborating with you and showcasing groundbreaking research at SC26.
NRE Proposal Submissions
Pre-staging: Preliminary Network Requirements
It is critical to provide early input to SCinet in terms of WAN bandwidth requests. Significant lead times are required to work with service providers and equipment vendors to plan, build, and validate WAN circuits. Early input is key to ensuring that the network can meet the needs of NRE applicants.
Please indicate on the Network Resource Form your connectivity needs so we can understand whether this initiative will benefit NRE participants.
* Submission format: On-line form
* Submission location: https://submissions.supercomputing.org/
* Submission deadline: April 15th, 2026
Stage 1: Preliminary Abstract
A one-page document outlining the high-level goals and activities related to the proposal is required to start the process. Only a single experiment should be included. Additional experiments should be outlined in separate documents. Please include details on networking needs such as end points/sources and network connection requirements. Note that, just like in 2025, this year submissions will be captured in the SC submission system. You may need to create an account.
* Submission format: Download Template: https://bit.ly/sc26nre_template
* Submission location: https://submissions.supercomputing.org/
* Submission deadline: April 30th, 2026
Stage 2: Refined Network Requirements
Please provide additional documentation outlining the final network requirements for the planned exhibition including sources (city, state, country of origin), bandwidth needs, VLAN requirements, and destination booth drops. WAN bandwidth requests that differ significantly from those outlined in the Preliminary WAN Requirements and/or resources section of the Preliminary Abstract may not be able to be fulfilled.
* Submission format: Any relevant submission style will be accepted.
* Submission location: https://submissions.supercomputing.org/
* Submission deadline: April 30th, 2026
Stage 3: Final Publishable Proposal
A two- to three-page submission with all relevant details of the activities, drawings, impact, and other research details, will also be required. This document will be published on the public SCinet NRE webpages.
* Submission format: Updated Preliminary Abstract format with final details and any changes from the Preliminary Abstract.
* Download Template: https://bit.ly/sc26nre_template
* Submission location: https://submissions.supercomputing.org/
* Submission deadline: October 23rd, 2026
Stage 4: Research Results and Findings
Lastly, the submission of findings and results of the demonstration will complete the process.
* Submission format: Same as the Final Publishable Submission
* Submission location: https://submissions.supercomputing.org/
* Submission deadline: January 22nd, 2027
As a reminder, it is critical to adhere to the above deadlines to ensure a successful SCinet demo.
** Booth information **
The NRE must be presented or demonstrated on the show floor, therefore you must be associated with an SC26 booth. SC provides a theater setting where research presentations are scheduled.
Booth connections can be requested via the Connection Request System
https://scinet.supercomputing.org/crs/
Accepted NRE participants will receive a 100% discount on network services to support the research activities.
Please note: SCinet does not pay costs associated with the booth: this includes the space, furnishing, shipment of equipment, or the power required to operate technology equipment at booths. The booth owner / researcher MUST pay for all of these costs to participate
The NRE team will confirm receipt of submission documents and will start the review process. We will be in contact with the involved parties throughout the process.
We look forward to receiving your NRE Preliminary Abstract on or before April 30th, 2026. If you have questions prior to then, please contact us here: nre(a)scinet.supercomputing.org<mailto:nre@scinet.supercomputing.org>
NRE FAQ
1. Can you submit a proposal outside of network research?
Proposals are open to more than just networking research. Proposals are not limited to networking research. Demonstrations in other domains are welcome provided that high-performance networking and/or HPC resources are central to the research workflow.
1. Can you submit one proposal for multiple experiments?
No, each experiment / demonstration must be submitted individually.
1. Does SCinet pay for costs associated with an SC26 booth (e.g., space, furnishings, shipment of equipment, or power)?
No, these costs are the sole responsibility of the booth owner
1. Does SCinet pay for your NRE booth connection?
Yes. SCinet provides a 100% discount on network connectivity services supporting accepted NRE demonstrations, subject to resource availability.
1. Do presentations / demonstrations have to be in person / at a booth?
Yes, generally a demo representative must be available at a booth for the duration of the SC26 show to perform/explain the demonstration and be available to answer questions from attendees. We also encourage researchers to present their work at the SC Theater.
1. What is the preferred format for submissions?
PDF is the preferred format.
Want to know more about NRE? Check our slides: https://bit.ly/sc26_nre_slides
Kind Regards,
SC26 NRE Team
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[AARNet Official]
Hi All,
If you are trying to connect and it's sitting waiting, it appears there was an issue with the calendar invite, please use: https://internet2.zoom.us/j/84695445069
Kind regards,
Warrick Mitchell (He/Him)
Director of Architecture
Upcoming leave:
warrick.mitchell(a)aarnet.edu.au<mailto:warrick.mitchell@aarnet.edu.au>
+61 416 089 354
Perth (AWST, UTC+08:00)
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AARNet Pty Ltd
PO Box 5519, Chatswood, NSW 1515, Australia
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Hi Routing Working Group!
Please see slides and video recording from our February Meeting
2026-02-24 Folder
https://drive.google.com/drive/folders/15nOS7EmPUYp7tksb4ntVBn69M42pVNJ9?us…
I have attached the calendar invite for our March meeting
March 17, 2026 8 am EDT / 12 PM UTC
Agenda:
Speakers: Steve Wallace, Jeff Bartig
Topic: CAIDA / Internet2 ROOTBEER project
Discussion and questions
Possible new routing case
AOB
Let us know if you have any questions or any cases you'd like to discuss
Brenna Meade
Internet2
bmeade(a)internet2.edu<mailto:meadeb@internet2.edu>