Skip to Content
[CAIDA - Center for Applied Internet Data Analysis logo]
Center for Applied Internet Data Analysis > data : passive : passive_trace_statistics.xml
Statistical information for the CAIDA Anonymized Internet Traces

|   Data Sources:    Realtime Monitors    Passive    Active    Other    External   |

The CAIDA Anonymized Internet Traces Dataset

CAIDA routinely collects traces on several backbone OC192 links: equinix-chicago (since April 2008) and equinix-sanjose (since July 2008). These monthly traces of one hour each are provided to interested researchers on request in pcap files containing payload-stripped, anonymized traffic organized in the annual datasets listed below.

Mainly driven by cost and size issues for disk storage, a decision was made in summer 2010 to reorganize the passive trace datasets on a quarterly schedule: each quarter the best of the three monthly traces is selected; each year only the four selected traces for each quarter are included in the online datasets. For the omitted traces only metadata are retained. These primarily include statistical information, and a breakdown in flow and protocol characteristics.

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 Statistical information for the CAIDA Anonymized Internet Traces,
Also, please, report your publication to CAIDA.

Statistics for monthly traces

This table provides a summary of statistics for all traces. The columns shows are from left to right:
  • Monitor
  • Year and month (including a link to a graphical display of breakup by protocol, application and country)
  • Start time of trace (UTC)
  • Stop time of trace (UTC)
  • Number of IPv4 packets
  • Number of IPv6 packets
  • Unknown packets (as fraction of total number of packets)
  • Transmission rate in packets per second
  • Transmission rate in bits per second
  • Link load (as fraction of nominal maximum load for an OC192 link (9.953×109 bits/s)
  • Average packet size (bytes) (including a link to a graph of the packet size distribution)

Anonymized Internet Traces Datasets

Restricted Datasets

Public Datasets

The data collection monitors

  Last Modified: Tue Mar-29-2016 16:55:53 PDT
  Page URL: