Thanks for your
interest in the AS topology data used for the analysis in our IMC'08
paper
"
Ten Years in the Evolution of the
Internet Ecosystem"
Topology files
The
rel_files.tar.gz file
contains the AS topology snapshots collected every 3 months over the
last 10 years.
Note that these topologies are NOT the most complete topologies
available in each time period. The topology
here represents the
primary
topology, meaning that we remove backup and transitent links that may
occur
during routing events. Please refer to the paper for the details of the
majority filtering algorithm
used to
remove backup and transient links.
Each snapshot file contains the AS relationships as inferred by Lixin
Gao's
relationship inference algorithm.
This algorithm is described in the paper "
On
Inferring Autononomous System Relationships in the Internet"
File format:
AS1 AS2 rel
where the relationships are:
0 = sibling
1 = customer-provider
2 = provider-customer
3 = peer
AS
classification
We classify ASes according to their
business functions. Our classification is based on the average customer
and peer degrees of an AS over the entire lifetime of that AS. Please
refer to our paper for details of the
classification.
Data:
sn.3m.all.AS.class
File format
AS_number AS_type
The 4 AS types are:
1 = Enterprise Customer (EC)
2 = Small Transit Provider (STP)
3 = Large Transit Provider (LTP)
4 = Content, Access and Hosting Provider (CAHP)
Additional
AS information
We extract additional information about
each AS using WHOIS queries. For this purpose, we use the WHOIS
service provided by Team Cymru.
Their WHOIS service provides information such as the registry where an
AS is registered (arin/ripencc/apnic/lacnic/afrinic), the country code
for that AS, and a brief description.
Data: sn.3m.all.AS.info
File format
AS_number | country | registry | description
Contact
Please contact Amogh Dhamdhere (amogh AT cc DOT gatech DOT
edu) with questions/comments or requests
for additional data.