The data collection has been implemented within scamper, We collect global traceroute data with scamper using the same methodology as The Ark IPv4 Routed /24 Topology Dataset (please see the description of this dataset for details of scamper and the collection methodology.) TNT works in two steps: (i) along with traceroute probes, it identifies evidence of a potential tunnel presence and, (ii) launches additional dedicated probing to reveal the content of the tunnel, if required.
Invisible MPLS tunnels:
Shortly after collecting a baseline traceroute path with scamper toward a target destination, we perform additional traceroutes to all IP addresses appearing in the traceroute path to infer router signatures. For each of these traces, we look at the last three hops and infer hopes revealed from invisible tunnels. A new trace is then launched towards those hopes as an attempt to reveal more hops. This recursive process stops either if no new addresses are revealed or if the new trace does not go through a potential endpoint of an invisible tunnel revealed by the original trace. For more information see:
- Y. Vanaubel et al.,2017,Through the Wormhole: Tracking Invisible MPLS Tunnels
- Y. Vanaubel et al.,2019, TNT, Watch me Explode: A Light in the Dark for Revealing All MPLS Tunnels
- TNT github repository
Data has been collected continuously since September 25, 2018, and daily measurements are available in warts format.
Reading TNT Data
You can analyze this data (in warts format) using Python scripts included in the TNT distribution package.
You can use additional tools (warts-dump and rb-wartslib, as described in The Ark IPv4 Routed /24 Topology Dataset, to read the baseline traceroute paths, but generally speaking, you will want to use the above TNT-specific tool to read the TNT data.
- Data older than one year is available as a public dataset. You can obtain access using this form.
- The most recent one year of data is available for use by academic researchers and US government agencies. This data is also available for corporate entities (including corporate researchers) who participate in CAIDA's membership program.
Please, complete and submit the online form to request access to the most recent TNT data. It usually takes about two to three business days to process your request. Upon approval you will receive an email with instructions on how to download the data you requested. If you have any questions or problems using this form, please contact email@example.com.
Acceptable Use Agreement
Access to these data is subject to the terms of the following CAIDA Acceptable Use Agreement (printable version in PDF format)
When referencing this data (as required by the AUA), please use:IPv4 TNT MPLS Topology Dataset - < dates used >, https://www.caida.org/data/active/ipv4_tnt_dataset.xml.
Please, report your publications using this dataset to CAIDA.
Request Data Access
- Freely Available Datasets
- The Ark IPv4 Routed /24 Topology Dataset (data older than one year only)
- The Ark IPv4 Routed /24 DNS Names Dataset (data older than one year only)
- IPv4 TNT MPLS Topology Dataset (data older than one year only)
- Ark Internet Topology Data Kits (ITDK) (data older than one year only)
- The Ark IPv6 Topology Dataset
- The Ark IPv6 DNS Names Dataset
- The IPv6 Routed /48 Topology Dataset
- IPv4 Routed /24 AS Links (September 2007 - ongoing)
- IPv6 AS Links (December 2008 - ongoing)
- AS Rank
- AS Relationships
- Skitter Macroscopic Topology Data
- Skitter Internet Topology Data Kits (ITDK) - April 2002 and April/May 2003
- Skitter AS Links (January 2000 - February 2008)
- Skitter Router Adjacencies
- AS Taxonomy
- PAM 2010 "Improving AS Annotations" Supplement
- Restricted Access Datasets
- The Ark IPv4 Routed /24 Topology Dataset (incl. most recent one year)
- The Ark IPv4 Routed /24 DNS Names Dataset (incl. most recent one year)
- IPv4 TNT MPLS Topology Dataset (incl. most recent one year)
- The Ark IPv4 Prefix-Probing Dataset (incl. most recent one year)
- Ark Internet Topology Data Kits (ITDK) (incl. most recent one year)
- Complete Routed-Space DNS Lookups
ReferencesFor more information on the "IPv4 TNT MPLS Topology Dataset" see:
For more information on CAIDA topology measurements, see:
For more information on topology measurements in general see: