Cristel Pelsser's blog

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Archive for the ‘Conference’ Category

On the Suitability of ping to Measure Latency

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While trying to detect the effect of routing configuration changes on network performance, we observed high RTT variability in ping measurements. We took a closer look and found stable per-flow RTTs but significant RTT difference between flows. The figure illustrates this finding. It shows the cumulation distribution of RTTs measured from Dallas to Ashburn. The red staircase is obtained with ping. The vertical curves are the RTT distributions observed for different flow ids.

CDF of RTTs between Dallas and Ashburn

More information on our experiments can be found in RIPE 66 or NANOG 58 presentations. See Olivier Bonaventure’s blog post for a brief explanation of ping and flow-based hashing.

The code to run the measurements is here.

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June 19th, 2013 at 12:33 pm

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Summarising a year and a half of research

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A few things happened since I last updated this blog. Research-wise, my publication list may be a good summary of the last events. Lately I worked on

  • IGP and BGP seamless reconfigurations,
  • Tamias, a distributed storage built on privacy and identity, and
  • the detection of unsafe BGP policies

See publications for the list of relative publications.

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June 18th, 2013 at 5:38 pm

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IGP migration paper accepted at SIGCOMM 2011

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Here is the reference:

Laurent Vanbever, Stefano Vissicchio, Cristel Pelsser, Pierre Francois and Olivier Bonaventure. “Seamless Network-Wide IGP Migrations”. In Proc. of SIGCOMM 2011, August 2011.

The complete list of accepted papers can be found here: accepted papers.

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May 9th, 2011 at 3:41 pm

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Tamia to be presented at FAST 2011

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Jean Lorchat, Cristel Pelsser, Randy Bush, Keiichi Shima. “Tamia: A Privacy Aware Distributed Storage”. FAST’2011 Poster, Feb 2011.

FAST 2011

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February 3rd, 2011 at 6:24 pm

oBGP accepted to Networking 2011

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Iuniana Oprescu, Mickael Meulle, Steve Uhlig, Cristel Pelsser, Olaf Maennel, Philippe Owzarski. “oBGP: an Overlay for a Scalable iBGP Control Plane”. IFIP Networking 2011, May 2011.

oBGP pdf

IFIP Networking 2011

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February 3rd, 2011 at 6:23 pm

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Route Flap Damping Made Usable

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Our paper, “Route Flap Damping Made Usable”, authored by C. Pelsser, O. Maennel, P. Mohapatra, R. Bush and K. Patel, has been accepted for publication at PAM 2011.

PAM 2011

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December 14th, 2010 at 4:43 pm

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Wide Camp

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Diner - each one has its own table

Diner - each one has its own table

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March 14th, 2010 at 9:51 pm

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ReArch 2009 (CoNEXT Workshop)

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Panel from Mark Handley

The data plane is well structured with the different layers of the OSI model. Comparatively, in the control plane, there are a lot of protocols but no structure. These protocols each solve a very specific issue. They do a good job about it but now is the time to take a step back.

The control plane protocols tend to solve three categories of problems:

  • congestion control
  • multi-homing
  • traffic engineering

Or problems resulting from the intersection of two of these categories.

In the presentation, Mark focusses on the intersection between congestion control and multi-homing. He proposes multi-path transport (multipath TCP) to solve this issue. For solving the congestion control and TE intersection problem, he proposes the re-ECN solution from BoB Briscoe.

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December 2nd, 2009 at 1:29 am

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