On the Usage of DSCP and ECN codepoints in internet backbone traffic traces for IPv4 and IPv6

Nils Roddav, Klement Streit, Gabi Dreo Rodosek, Aiko Pras

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

1 Citation (Scopus)

Abstract

Differentiated Services Code Points are values that can be used on IP packets to mark traffic and allow for different Quality of Service treatment during the traversal through a network. Explicit Congestion Notifications are used to indicate that congestion on a network occurred. Both values are encoded in the previously called Type of Service field in the IP header. In this paper, we look at codepoint values for DSCP and ECN in relation to the ports used on the transport layer, which lets us infer the application that is generating the traffic. We provide new measurement data by analyzing traffic from Internet backbone links collected by CAIDA from the months March, April, and May 2018 in New York City. Our results show that DSCP codepoints are rarely used in IPv4 but even less in IPv6. Moreover, most traffic using DSCP codepoints is only using default values and not values designed for prioritization of packets. ECN-enabled traffic is scarce in IPv4, while in IPv6 it appears to be neglectable. However, we could observe differences for certain application traffic in the usage of DSCP and ECN codepoints and elaborate on their distribution.

Original languageEnglish
Title of host publication2019 International Symposium on Networks, Computers and Communications, ISNCC 2019
PublisherIEEE
ISBN (Electronic)9781728112435
DOIs
Publication statusPublished - 21 Nov 2019
Event6th International Symposium on Networks, Computers and Communications, ISNCC 2019 - Istanbul, Turkey
Duration: 18 Jun 201920 Jun 2019
Conference number: 6

Conference

Conference6th International Symposium on Networks, Computers and Communications, ISNCC 2019
Abbreviated titleISNCC 2019
CountryTurkey
CityIstanbul
Period18/06/1920/06/19

Keywords

  • Differentiated Services Code Point
  • Explicit Congestion Notification
  • Internet Measurements
  • Quality of Service
  • Traffic Analysis
  • Type of Service

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