isp interconnection and its impact on consumer internet ...€¦ · research limitations • we...
TRANSCRIPT
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ISP Interconnection and its Impact on Consumer Internet Performance
Measurement Lab
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How Measurement Lab Collects Information About 200,000 Test Per Day
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How Measurement Lab Collects Information Measurements From Everyone
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Measurement has a Place in Policy We can measure this!
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Methodology
Inferring the Source of Congestion
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Methodology
Inferring the Source of Congestion
![Page 8: ISP Interconnection and its Impact on Consumer Internet ...€¦ · Research Limitations • We cannot determine which actors or actions are “responsible” for observed degradation](https://reader034.vdocuments.site/reader034/viewer/2022042320/5f0971be7e708231d426dd04/html5/thumbnails/8.jpg)
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![Page 9: ISP Interconnection and its Impact on Consumer Internet ...€¦ · Research Limitations • We cannot determine which actors or actions are “responsible” for observed degradation](https://reader034.vdocuments.site/reader034/viewer/2022042320/5f0971be7e708231d426dd04/html5/thumbnails/9.jpg)
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Inferring the Source of Congestion
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Inferring Sources of Congestion in Practice
US Access ISPs and Cogent (2013-2014)
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Inferring Sources of Congestion in Practice
US Access ISPs and Cogent (2013-2014)
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Inferring Sources of Congestion in Practice
US Access ISPs and Cogent (2013-2014)
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Inferring Sources of Congestion in Practice
US Access ISPs and Cogent (2013-2014)
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Comparative Performance across ISPs
No Access ISPs or Transit ISPs Universally Underperforming
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Diurnal Trends Matter
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Diurnal Patterns Are Instructive Expectations of Normal Performance
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Diurnal Patterns Are Instructive Expectations of Congested Performance
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Diurnal Cycles In Practice
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Diurnal Patterns Are Instructive
Peak Congestion Can Augur Future Degradation
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Congestion affecting consumers has not been limited to interconnections with Cogent
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Level 3 and Verizon Ongoing
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XO and Time Warner Cable Ongoing
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Serendipitous Discovery
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What Happened in Late February? Cross the Board Increases
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What Happened in Late February? Cross the Board Increases
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DSCP Changes! Cross the Board Increases
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Extending the Interconnection Study
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Measurement Lab Telescope Python to extract M-Lab data
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Measurement Lab Observatory Currently US Only
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Measurement Lab Observatory Currently US Only
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Review, Clarifications and Conclusions
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Our data shows that traffic from specific Access ISP customers across interconnections
with specific Transit ISPs experienced degraded performance, and that this
degradation forms a pattern wherever specific Access ISPs and Transit ISPs exchange traffic.
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–Randy Bush
“This is a measurement study, not an answer study.”
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Although, Measurement Matters to the Public People Need Information
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Research Limitations
• We cannot determine which actors or actions are “responsible” for observed degradation.
• Path data is not included in the scope of this report (but it is collected and consulted by M-Lab).
• We cannot identify the precise cause of performance problems (e.g. a broken router) in a path between a client.
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Criticisms and Contributions
• Host a Measurement Lab site.
• Review Telescope, and extend it for your own purposes.
• Access our data and review our measurement methodology.
• Discuss this research on the [email protected] list.
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