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The IPv6 Topology Dataset

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The IPv6 Topology Dataset

The IPv6 Topology Dataset contains information useful for studying the IP- and AS-topology of the IPv6 Internet. The focus of this measurement is on discovering topology and not on finding responding destinations. A globally distributed set of Archipelago (Ark) monitors has continuously collected this data since December 12, 2008.

We use scamper to perform ICMP-based traceroutes using the Paris traceroute technique. For each probed path, we collect the IP address, RTT, reply TTL, and ICMP responses for all hops, including intermediate hops.

Each Ark monitor probes all announced IPv6 prefixes (/48 or shorter) once every 48 hours. One probing pass through all announced prefixes is called a cycle. In each cycle, a monitor probes only a single random destination in each prefix. Different monitors probe prefixes in independently-chosen random orders and probe to an independently-chosen random destination in each prefix. Prefixes are randomly ordered in such a way that a given monitor never probes the same prefix within 16 hours across cycle boundaries (a monitor can never re-probe a prefix within the same cycle, by definition).

As of April 2014, 35 of the deployed Ark monitors are probing 10,269 routed IPv6 prefixes.

Data availability

The IPv6 Ark topology data are available as a public dataset since February 2014.

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:

The CAIDA UCSD IPv6 Topology Dataset - <dates used>,
Also, please, report your publication to CAIDA.

Request Data Access

Access the publicly available CAIDA IPv6 Topology Dataset (and other topology data)

Topology Datasets


For more information on CAIDA topology measurements, see:

For more information on topology measurements in general see:

  Last Modified: Thu Jun-9-2016 17:04:59 PDT
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