[lacnog] Fwd: [afnog] Four Years Tracking Unrevealed Topological Changes in the African Interdomain

Gael Hernandez gael en pch.net
Lun Abr 3 13:10:19 BRT 2017

Hago un cross-posting a petición del interesado…


Forwarded message:

> From: Roderick <roderick.fanou en imdea.org>
> To: Afnog <afnog en afnog.org>
> Subject: [afnog] Four Years Tracking Unrevealed Topological Changes in 
> the African Interdomain
> Date: Mon, 3 Apr 2017 16:30:44 +0200
> Dear all,
> We would like to share the url 
> https://authors.elsevier.com/a/1UoaAVwcQSH8w, on which are described 
> the results of a scientific study investigating the evolution of the 
> Interdomain routing in Africa using the RIPE Atlas infrastructure.
> This paper is entitled “Four Years Tracking Unrevealed Topological 
> Changes in the African Interdomain”.  It has been published at the 
> Computer Communications Journal, which provides a 50 days free access,
> i.e. the manuscript will be freely downloadable by anyone until May 
> 20, 2017. After that period, it will need to be purchased.
> Please find below its abstract:
> Abstract
> Despite extensive studies on the Internet topology, little is still 
> known about the AS level topology of the African Internet, especially 
> when it comes to its IXP substrate. The main reason for this is the 
> lack of vantage points that are needed to obtain the proper 
> information. From 2013 to 2016, we enhanced the RIPE Atlas measurement 
> infrastructure in the region to shed light on both IPv4 and IPv6 
> topologies interconnecting local ISPs. We increased the number of 
> vantage points in Africa by 278.3% and carried out measurements 
> between them at random periods. To infer results that depict the 
> behavior of ISPs in the region, we propose reproducible traceroute 
> data analysis techniques suitable for the treatment of any set of 
> similar measurements. We first reveal a large variety of ISP transit 
> habits and their dependence on socio-economic factors. We then compare 
> QoS within African countries, European countries, and the US to find 
> that West African networks in particular need to promote investments 
> in fiber networks and to implement traffic engineering techniques. Our 
> results indicate the remaining dominance of ISPs based outside Africa 
> for the provision of intra-continental paths, but also shed light on 
> traffic localization efforts. We map, in our traceroute data, 62.2% of 
> the IXPs in Africa and infer their respective peers. Finally, we 
> highlight the launch of new IXPs and quantify their impacts on 
> end-to-end connectivity. The study clearly demonstrates that to better 
> assess interdomain routing in a continent, it is necessary to perform 
> measurements from a diversified range of vantage points.
> Keywords
> African internet; IXP substrate; RIPE Atlas; Transit; Traffic 
> localization
> Please feel free to share this mail or the url 
> (https://authors.elsevier.com/a/1UoaAVwcQSH8w).
> Comments and questions are welcome.
> Thanks and regards,
> The authors.

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