Tag Archives: editorial

The Dagstuhl Beginners Guide to Reproducibility for Experimental Networking Research

Vaibhav Bajpai, Anna Brunstrom, Anja Feldmann, Wolfgang Kellerer , Aiko Pras, Henning Schulzrinne, Georgios Smaragdakis, Matthias Wählisch , Klaus Wehrle


Reproducibility is one of the key characteristics of good science, but hard to achieve for experimental disciplines like Internet measurements and network systems. This guide provides advice to researchers, particularly those new to the field, on designing experiments so that their work is more likely to be reproducible and to serve as a foundation for follow-on work by others.

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Open Collaborative Hyperpapers: A Call to Action

Alberto Dainotti, Ralph Holz, Mirja Kühlewind, Andra Lutu, Joel Sommers, Brian Trammell


Drawing on discussions at various venues, we envision a publishing ecosystem for Internet science, supporting publications that are self-contained, interactive, multi-level, open, and collaborative. These publications, which we dub hyperpapers, not only address issues with reproducibility and verifiability of research in Internet science and measurement, but have the potential to increase the impact of our work and change how collaborations work in the field. This note announces initial experiments with Internet measurement hyperpapers with the help of common, tested technologies in data science and software development, and is a call to action to others to come build out this vision with us.

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The October 2018 issue

SIGCOMM’18 was held in Hungary and the participants were pleased with both the technical program and the social interactions with all the members of the community. During her keynote on Networks Capable of Change, Jennifer Rexford mentioned two papers published in CCR that have had an important impact on our community : OpenFlow: enabling innovation in campus networks and P4: programming protocol- independent packet processors. These two editorial notes paved the way for Software-Defined Networks and then programmable switches. They are a good illustration of the benefits of having a venue like CCR that is open to other types of papers than the scientific papers that usually appear in our conferences and workshops.

This issue contains three regular papers, two editorial notes and the best papers of five recent SIGCOMM’18 workshops. Our first paper, On Max-min Fair Allocation for Multi-source Transmission, co-authored by G. Li et al., proposes and evaluates an algorithm to provide max-min fairness in a network where the same information can be downloaded from multiple sources. In On Collaborative Predictive Blacklisting, Luca Malis and his colleagues study collaborative predictive blacklisting (CPB) wherein differ- ent organizations share information about attacks in real time and use it to update their blacklists. Finally, in Bootstrapping Privacy Services in Today’s Internet, T. Lee et al. propose and analyse different services that could be provided by Internet Service Providers to provide better privacy to their users.

The two editorial notes published in this issue are very different. In Toward Demand- Aware Networking: A Theory for Self- Adjusting Network, C. Avin and S. Schmid propose to initiate the study of the theory of demand-aware, self-adjusting networks. In The 10th Workshop on Active Internet Measurements (AIMS-10) Report, kc Claffy and David Clark report the lessons learned from a recent workshop.

This issue also contains the best pa- pers selected by the organizers of five SIGCOMM’18 workshops:

• Learning IP Network Representations presented by M. Li et al. at BIG- DAMA’18

• Measuring the Impact of a Success- ful DDoS Attack on the Customer Behaviour of Managed DNS Service Providers presented by A. Abhista et al. at the workshop on traffic measure- ments for Cybersecurity

• Making Content Caching Policies ’Smart’ using the DeepCache Framework presented by A. Narayanan et al. at NetAI’18

• Refining Network Intents for Self- Driving Networks presented by A. Jacobs et al. at SelfDN’18

• A Formally Verified NAT Stack presented by S. Pirelli et al. at KBNets’18

The composition of the Editorial Board has also been modified recently. After several years of active participation, Costin Raiciu, Fahad Dogar, Alberto Dainotti and David Choffnes have concluded their term. I would like to thank them on behalf of the authors of all the papers that they handled during the last years. Sergey Gorinsky (IMDEA Networks, Spain) has agreed to join the Editorial board.

I hope that you will enjoy reading this new issue and welcome comments and suggestions on CCR Online (https: //ccronline.sigcomm.org) or by email at ccr-editor at sigcomm.org.

Olivier Bonaventure

CCR Editor

Toward Demand-Aware Networking: A Theory for Self-Adjusting Networks

Chen Avin, Stefan Schmid


The physical topology is emerging as the next frontier in an ongoing effort to render communication networks more flexible. While first empirical results indicate that these flexibilities can be exploited to reconfigure and optimize the network toward the workload it serves and, e.g., providing the same bandwidth at lower infrastructure cost, only little is known today about the fundamental algorithmic problems underlying the design of reconfigurable networks. This paper initiates the study of the theory of demand-aware, self-adjusting networks. Our main position is that self-adjusting networks should be seen through the lense of self-adjusting datastructures. Accordingly, we present a taxonomy classifying the different algorithmic models of demand-oblivious, fixed demand-aware, and reconfigurable demand-aware networks, introduce a formal model, and identify objectives and evaluation metrics.We also demonstrate, by examples, the inherent advantage of demand-aware networks over state-of-the-art demand-oblivious, fixed networks (such as expanders). We conclude by observing that the usefulness of self-adjusting networks depends on the spatial and temporal locality of the demand; as relevant data is scarce, we call for community action.

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The 10th Workshop on Active Internet Measurements (AIMS-10) Report

kc Claffy, David Clark


On 13-15 March 2018, CAIDA hosted its tenth Workshop on Active Internet Measurements (AIMS-10). This workshop series provides a forum for stakeholders in Internet active measurement projects to communicate their interests and concerns, and explore cooperative approaches to maximizing the collective benefit of deployed infrastructure and gathered data. An overarching theme this year was how to inform new legislation of communications policy in the U.S. Given the continued limited insight into Internet operations by researchers and policymakers, we tried to focus these discussions on what data is or could be measured to shape and support current and emerging policy debates. Materials related to the workshop are at http://www.caida.org/workshops/aims/1803/.

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The July 2018 issue

In May, the CCR Editorial board selects the two best papers that were published in the four previous issues (i.e. July 2017, October 2017, January 2018 and April 2018). For 2018, two measurement papers were chosen:

These two papers will be presented during the CCR session at SIGCOMM’18. Both papers have proposed a methodology, collected measurements and released artifacts to allow other researchers to reproduce and extend the paper results. CCR continues to encourage papers to release their artifacts by allowing them to be longer than six pages. SIGCOMM will do one further step to encourage the release of paper artifacts by the creation of an Artifacts Evaluation Committe that will organise the evaluation of the artifacts associated with papers accepted in CCR and the SIGCOMM sponsored conferences in 2018. The final details are still being discussed. They will be announced during SIGCOMM’18 and posted on https://www.sigcomm.org.

This issue starts with three technical articles. In Accelerating Network Measurement in Software, Y. Zhou, O. Alipourfard, M. Yu and T. Yang propose a new technique that leverages caching to improve network measurement software. They release the software
developed for the paper at https://github.com/zhouyangpkuer/Agg-Evict.

Our second technical paper looks at the BGP peerings and more precisely those maintained by the so called Hypergiants, i.e. the larget content providers and CDNs. T. Bottger, F. Cuadrado and S. Uhlig analyse in Looking for Hypergiants in PeeringDB the interconnections of those networks from IXP data. The authors also release the code and the dataset used to write their paper.

The third technical paper of this issue fo- cuses on the Domain Name System. R. AlDalky, M. Rabinovich and M. Allman propose and evaluate in Practical Challenge-Response for DNS a new technique that relies on challenge-responses to validate the authenticity of DNS requests.

In addition to the technical papers, this issue also contains three editorial notes. In Mosaic5G: Agile and Flexible Service Platforms for 5G Research, N. Nikaein, C. Chang and K. Alexandris describe Mosaic5G, an open-source software platform that can be used to create 5G networks. Given the buzz around 5G networks, I expect that many researchers will be interested by this platform. In NDN Host Model, H. Zhang, Y. Li, Z. Zhang, A. Afanasyev and L. Zhang discuss how the traditionnal host model must be reconsidered with Named Data Networking (NDN). Finally, KC Claffy, G. Huston and D. Clark summarise in Workshop on Internet Economics (WIE2017) Final Report the conclusions of a recent workshop that they organised.

I hope that you will enjoy reading this new issue and welcome comments and suggestions on CCR Online  or by email at ccr-editor at sigcomm.org.

Olivier Bonaventure

CCR Editor

Mosaic5G: Agile and Flexible Service Platforms for 5G Research

Navid NikaeinChia-Yu Chang, Konstantinos Alexandris

Network slicing is one of the key enablers to provide the required flexibility and to realize the service-oriented vision toward fifth generation (5G) mobile networks. In that sense, virtualization, softwarization, and disaggregation are core concepts to accommodate the requirements of an end-to-end (E2E) service to be either isolated, shared, or customized. They lay the foundation for a multi-service and multi-tenant architecture, and are realized by applying the principles of software-defined networking (SDN), network function virtualization (NFV), and cloud computing to the mobile networks. Research on these principles requires agile and flexible platforms that offer a wide range of real-world experimentations over different domains to open up innovations in 5G. To this end, we present Mosaic5G, a community-led consortium for sharing platforms, providing a number of software components, namely FlexRAN, LL-MEC, JOX and Store, spanning application, management, control and user plane on top of OpenAirInterface (OAI) platform. Finally, we show several use cases of Mosaic5G corresponding to widely-mentioned 5G research directions.

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NDN Host Model

Haitao ZhangYanbiao Li , Zhiyi Zhang, Alexander Afanasyev, Lixia Zhang

As a proposed Internet architecture, Named Data Networking (NDN) changes the network communication model from delivering packets to destinations identified by IP addresses to fetching data packets by names. This architectural change leads to changes of host functions and initial configurations. In this paper we present an overview of the host functions in an NDN network, together with necessary operations to configure an NDN host.We also compare and contrast the functionality and configuration between an NDN host and an IP host, to help readers see the differences in between clearly.

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Workshop on Internet Economics (WIE2017) Final Report

KC Claffy, Geoff Huston  David Clark,

On December 13-14 2017, CAIDA hosted the 8th interdisciplinary
Workshop on Internet Economics (WIE) at the UC San Diego’s Supercomputer Center. This workshop series provides a forum for researchers, Internet facilities and service providers, technologists, economists, theorists, policy makers, and other stakeholders to exchange views on current and emerging regulatory and policy debates. The FCC’s expected decision (released during the workshop, on 14 December 2017) — to repeal the 2015 classification of broadband Internet access service as a telecommunications
(common carrier) service — set the stage for vigorous discussion on what type of data can inform debate, development, and empirical evaluation of public policies we will need for Internet services in the future.

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The April 2018 Issue

This issue starts with two technical articles that provide artefacts. The first one, Scanning the Internet for Liveness, written by a team of eight researchers led by S. Bano uses the ZMap software to probe the IPv4 addressing space for Internet hosts that respond to different types of probes. They propose different liveness probes that use ICMP, TCP and UDP. Their scans of the IPv4 Internet revealed that different protocols (or ports for TCP/UDP) provide different results as different types of hosts respond or not to different types of probes. Furthermore, collecting ICMP error messages for the TCP and UDP probes is important to increase the coverage. The authors release their modification to ZMap that includes the proposed probes and data collected during their measurement campaigns.

The second technical paper that provides artefacts is A First Look at Certifi- cation Authority Authorization (CAA) was co-authored by eleven researchers led by Q. Scheitle. This is also a measurement paper that tries to understand how the Certification Authority Authorization (CAA) DNS record is actually used by Certification Authorities (CA), domain holders and DNS operators. This is a timely paper since RFC6844 mandates that CAs validate CAA records as of September 8, 2017. Their study reveals some anomalies for already-issued certificates and they provide some guidelines to improve the security impact of CAA. Their study continues and you can follow the updated results on https://caastudy. github.io. The authors release both the collected data and their analysis tools.

In our third technical paper, Towards Slack-Aware Networking, Fahad Dogar proposes a new architecture targeted at machine-to-machine communications where hosts could indicate some slack when transmitting packets to let the network optimise their delivery to reduce the consumption of network ressources. This new idea still needs to be implemented and validated but it could open new directions of research.

In addition to the technical papers, this issue also contains three editorial notes. In VANETs’ research over the past decade: overview, credibility, and trends, E. Caval- canti et al. provide a detailed survey of the research in Vehicular Ad hoc Networks (VANETs) during the last decade and analyse 283 papers according to different criterias. They release the collected data as paper artefacts. In Failures from the Environment, a Report on the First FAILSAFE workshop, M. Breza et al. summarise the FAILSAFE 2017 workshop held at the SenSys 2017 conference. Finally, I. Baldin et al. summarise in The Future of Distributed Network Research Infrastructure the lessons that they learned from the Global Environment for Network Innovations (GENI) infrastructure and provide several directions for future research projects.

I hope that you will enjoy reading this new issue and welcome comments and suggestions on CCR Online or by email at ccr-editor at sigcomm.org.

Olivier Bonaventure

CCR Editor