CAIDA Skitter Router-Level Topology Measurements

CAIDA releases the adjacency matrix of the Internet router-level graph computed from the ITDK0304 skitter data collected between Apr 21 and May 8, 2003.

Router-Level Topology and Degree Distribution

Acceptable Use Agreement

Access to these data is subject to the terms of the following CAIDA Acceptable Use Agreement (printable version in PDF format)
CAIDA ACCEPTABLE USE AGREEMENT for PUBLICLY ACCESSIBLE DATASETS The following terms comprise the Acceptable Use Policy and Data License Agreement for all publicly accessible datasets (the "Public Agreement") made available by the Center for Applied Internet Data Analysis (CAIDA), a research unit at the University of California San Diego (UCSD) and governed by The Regents of the University of California. LICENSE CAIDA's authorization to access the data grants You a limited, non-exclusive, non-transferable, non-assignable, and terminable license to copy, modify, and use the data in accordance with this Public Agreement. No license is granted for any other purpose and there are no implied licenses in this Agreement. Nothing in this License is intended to limit any rights You may have arising from fair use or due to other limitations on CAIDA's exclusive rights under copyright law or other applicable laws. CAIDA has the authority and reserves the right, in its sole discretion, to discontinue further access and use to anyone who violates this AUA. If You create a publication (including web pages, papers published by a third party, and publicly available presentations) using data from this dataset, You should cite the data as follows: The CAIDA UCSD [DataSet Name] - [dates used], https://www.caida.org/data/[dataset-URL] We encourage You to provide CAIDA with a copy of (or a link to) the publication. We use this information in reports to our funding agencies. DISCLAIMER OF WARRANTIES. CAIDA USES ITS BEST EFFORTS TO PROVIDE DATA IN ACCORDANCE WITH ETHICAL PRINCIPLES AND SCIENTIFIC INTEGRITY. HOWEVER, THE DATA PROVIDED HEREIN IS ON AN "AS IS" BASIS. NEITHER CAIDA, ITS RESEARCHERS, RESEARCH PARTNERS, LICENSORS, AND DATA PROVIDERS, NOR THE UNIVERSITY OF CALIFORNIA AND ITS TRUSTEES, OFFICERS, EMPLOYEES, AND AGENTS MAKE ANYWARRANTY, EITHER IMPLIED OR EXPRESS, OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, INCLUDING, BUT NOT LIMITED TO, THE ACCURACY, TIMELINESS, COMPLETENESS, RELIABILITY, OR AVAILABILITY OF CAIDA DATA, APPLICATIONS, OR SERVICES ACCESSIBLE THROUGH OR MADE AVAILABLE BY CAIDA. LIMITATION OF LIABILITY. TO THE EXTENT ALLOWED BY LAW, IN NO EVENT SHALL CAIDA AND THE UNIVERSITY OF CALIFORNIA BE LIABLE TO YOU OR ANY THIRD PARTY FOR ANY INDIRECT, CONSEQUENTIAL, INCIDENTAL, SPECIAL OR PUNITIVE DAMAGES, ARISING FROM YOUR USE OF THE DATA. If You have any questions about the data or about this Public Agreement, please email data-info@caida.org.

When referencing this data (as required by the AUA), please use:

CAIDA Skitter Router-Level Topology and Degree Distribution,
https://www.caida.org/data/router-adjacencies/

Also, please, report your publication to CAIDA.

Data Access

directed graph: itdk0304_rlinks_directed.gz;
undirected graph: itdk0304_rlinks_undirected.gz.

The two files available for download above constitute a CAIDA release of the adjacency matrix of the Internet router-level graph computed from ITDK0304 skitter and iffinder measurements. More precisely, we used the following methodology to obtain the above data:

generate IP links from ITDK skitter traces;
merge interface aliases found with iffinder into routers;
map IP links to router links;
remove all nodes with either in-degree 0 or out-degree 0 (note that the majority of nodes removed this way are end hosts);
anonymize IP addresses.

The first data file holds link directions corresponding to the traceroute directions, while the second file is an undirected version of the first file. There are a total of 192244 nodes, 636643 directed links, and 609066 undirected links. The average and maximum node degrees (undirected) are 6.34 and 1071 respectively, and the node degree distribution is plotted below: