Selected Papers - ISBN 978-90-77559-00-0

TNC2011 - Enabling Communities


Enabling Communities

The 27th TERENA Networking Conference was held at the Clarion Congress Hotel in Prague, Czech Republic from 16-19 May 2011, hosted by the Czech National Research and Education Network (CESNET). The conference provided an opportunity for researchers, operators and suppliers of Research and Education Networks in Europe and beyond to meet, present and discuss their latest result and requirements in an ideal environment for promoting collaboration.

This year's conference theme was "Enabling Communities". Networks have evolved from being a pure data transporter to being an enabler of global communities with shared resources and goals. Networks enable new pervasive forms of collaboration and sharing, affecting all aspects of our lives. Networks enable teams, institutions and countries to come together to develop innovative solution to complex challenges.

Conference summary

Six plenary speakers addressed different topics related to the conference theme: "Enabling Communities". In Monday's Plenary, Jaroslav Koca brought us into the micro and nanoworld, where things like viruses or bacteria are extremely huge objects. It showed how these objects may recognize other objects, especially human cells. To be able to influence these nanoworld processes, e.g., to design new antiviral and antibacterial drugs, one has to be able to understand them at the molecular and atomic levels. Computer simulations and modeling may help substantially in this area. However, the required calculations are usually very intensive and the possibility to use a grid of computers via high performance networks is a big plus.

Two aspects related to the digital world we live in were addressed by Pradeep Sindhu and Cees de Laat in Tuesday's Plenary. Pradeep Sindhu addressed the outlook for networking in the face of rising demands, advanced applications and collaborations, new technologies and the complex interaction of technology and applications. Cees de Laat talked about the use of state-of-the-art network technologies in support of e-Science and the great benefit of networking and e-Infrastructure to researchers in many disciplines. With experience from projects in high-energy physics, radio-astronomy, dike engineering, medical research, and more, Cees de Laat showed us how networking enables research collaboration on a new scale.

Ian Bird talked about the successful first year of the LHC project, demonstrating that the Worldwide LHC Computing Grid (WLCG) infrastructure is able to support the huge volumes of data and large scale distributed analysis. He gave an overview of the technical implementation of the distributed computing infrastructure, mentioning some of the key successes and lessons learnt. Finally, Ian Bird described how the evolution of the collaboration and the infrastructure make use of evolving technologies and address areas of concern.
In his plenary presentation, "Building communities: bricks, rules or generosity", Andrew Cormack talked about how community is created and what can go wrong. The talk considered examples from both the real and on-line world, celebrated some of the NREN community's successes and suggested issues likely to arise as we continue to develop and expand our communities.

John Wilbanks had the opportunity, in the closing plenary, to look at open access, and how openness is vital to the transformational power of the Internet. The Sciences Commons Initiative provides an example of how National Research and Education Networks can support this effort.

Selected Papers Summary

Ten papers presented in parallel sessions have been selected for this publication. Like the conference, they cover a wide range of topics.

Cees De Laat, Cosmin Dumitru and Ralph Koning from the University of Amsterdam profile the performance of state-of-the-art server hardware combined with 40GE technology. Their paper on '40 Gigabit Ethernet' gives an insight into the issues involved with ultra high performance network adapters and suggest optimization approaches in order to reach transparent end-to-end connectivity.

Mark Prins (TNO) and Richa Malhotra (SURFnet) (Netherlands), in their paper on 'Ethernet Operation Administration and Management' address a related issue. The paper discusses new Ethernet Operation Administration and Management (OAM) mechanisms which could prove extremely beneficial in terms of network diagnostics, monitoring services and verifying their performance end-to-end. The results of the paper can be used as a starting point when planning to deploy monitoring for Ethernet services in a single and multi domain environment.

A different aspect is discussed in the paper by Lars Lange Bjorn (NORDUnet), Roeland Nuijts, Martin Nordal Petersen and Anna Manolova entitled 'Design and OAM&P aspects of a DWDM system equipped with a 40Gb/s PM-QPSK alien wavelength and adjacent 10Gb/s channels'. Here, though, OAM&P stands for Operation, Administration, Maintenance and Provisioning of an alien wavelength in CBF transmission systems. The paper describes the results of experiments conducted on the Hamburg-Copenhagen section of the Amsterdam-Copenhagen CBF (Cross Border Fiber) connection between SURFnet and NORDUnet.

A step further is taken in the paper by Bruno Hoeft (KIT), Andreas Hanemann, Robert Stoy (DFN-Verein) from Germany, on 'DFN@100G'. It describes the results of a field trial that was conducted by DFN together with two research institutions, two vendors and a fibre provider to try the 100 G technology in a real world environment. The test was not limited to only testing the optical transmission, but it included the transport of IP data packets over the 100 Gbps link demonstrating the behaviour during medium and high load.

The provocative title of the paper by Eduard Grasa, Eleni Trouva, John Day, Ibrahim Matta, Lubomir T. Chitkushev, Patrick Phelan, Miguel Ponce de Leon and Steve Bunch of Fundacio i2CAT (Spain) asks 'Is the Internet an unfinished demo?' It looks at the deficiencies of the current Internet architecture and contrasts the traditional beliefs on networking with new ones, coming from a network architecture based on the fundamentals. It presents RINA (Recursive InterNetwork Architecture), showing the fundamental principles from which RINA is derived, the core elements of the architecture and giving a simple example of communication.

Ognjen Dobrijevic and Maja Matijasevic (University of Zagreb) (Croatia) look at 'QoS Management for Multimedia Services Based on Session Reconfiguration'. The paper presents a Quality of Service (QoS) approach which maintains and adapts QoS for multimedia services by means of session reconfiguration.

The paper by William E. Johnston, Chin Guok and Evangelos Chaniotakis (ESnet / LBNL) (USA) on 'Motivation, Design, Deployment and Evolution of a Guaranteed Bandwidth Network Service' stipulates that two network services have emerged as essential for supporting high performance distributed applications: guaranteed bandwidth and multi-domain monitoring. The paper discusses the design of the OSCARS virtual circuit service and its evolution, with user experience showing some issues with the original design, and its deployment in a large production network. The result of the deployment is that ESnet is a fully integrated, hybrid packet-circuit network infrastructure.

Vladimir Smotlacha and Alexander Kuna (CESNET)(Czech Republic), in their paper entitled 'Time and Frequency Transfer in All-optical Network' describe the usage of an all-optical network for time and frequency transfer between two geographically distant sites. The method is based on newly developed adapters utilizing channels in a DWDM (Dense Wavelength-Division Multiplexing) network. The paper presents results of tests performed in a real production all-optical network including the time transfer between atomic clocks in Prague and Vienna over an optical path of more than 500 km.

The paper by Apollon Oikonomopoulos and Faidon Liambotis of GRNET (Greece) describes the work of GRNET, which over the past two years has gradually moved all of its services to an in-house developed virtualized infrastructure. The paper outlines the experience gained from the successive iterations of GRNET's virtualization service and provides best practices for working with consolidated systems. It covers the different architectural choices, the problems encountered and the solutions provided during the three iterations of the service.

Lastly, the paper by Stephane Ribas (INRIA) (France) looks at 'Ways of building open source projects and pitfalls to avoid.' It advocates a structured approach to build and sustain communities in this, based on five main steps derived from the research of Stan Garfield and Richard McDermott. Key factors are transparency, trust and people commitment.

Archives of live–streamed speeches, speakers’ slides and other TNC2011 information are all available via the conference website: We look forward to welcoming you, either in the real or virtual worlds, to TNC2012, which will be held in Reykjavik, Iceland, from 21 to 24 May 2012, and at

Miroslav Milinović
Vice-President Conferences TERENA


(alphabetically by presenting author)

  • Scaling up your virtualization infrastructure
    Apollon Oikonomopoulos , Faidon Liambotis (GRNET) pdf
  • DFN@100G - A Field Trial of 100G Technologies related to Real World Research Scenarios
    Bruno Hoeft (KIT), Andreas Hanemann, Robert Stoy (DFN-Verein) pdf
  • 40 Gigabit Ethernet: Prototyping Transparent End-to-End Connectivity
    Cees De Laat, Cosmin Dumitru, Ralph Koning (UvA) pdf
  • Is the Internet an unfinished demo? Meet RINA!
    Eduard Grasa Eleni Trouva, John Day, Ibrahim Matta, Lubomir T. Chitkushev, Patrick Phelan, Miguel Ponce de Leon and Steve Bunch (Fundacio i2CAT) pdf
  • Design and OAM&P aspects of a DWDM system equipped with a 40Gb/s PM-QPSK alien wavelength and adjacent 10Gb/s channels
    Lars Lange Bjorn (NORDUnet), Roeland Nuijts, Martin Nordal Petersen and Anna Manolova pdf
  • Ethernet Operation Administration and Maintenance - Opportunities for the NREN community
    Mark Prins (TNO), Richa Malhotra (SURFnet) pdf
  • QoS Management for Multimedia Services Based on Session Reconfiguration: A Future Internet Case Study
    Ognjen Dobrijevic, Maja Matijasevic (University of Zagreb) pdf
  • Build a FLOSS community from scratch? Ways of building open source projects and pitfalls to avoid.
    Stephane Ribas (INRIA) pdf
  • Time and Frequency Transfer in All-optical Network
    Vladimir Smotlacha, Alexander Kuna (CESNET) pdf
  • Motivation, Design, Deployment and Evolution of a Guaranteed Bandwidth Network Service
    William E. Johnston, Chin Guok, Evangelos Chaniotakis (ESnet / LBNL) pdf
TNC2011 Programme Committee
Lars Fischer NORDUnet Denmark
Bartosz Belter PSNC Poland
Serge Droz SWITCH Switzerland
Bartlomiej Idzikowski PSNC Poland
David Kelsey STFC Rutherford Appleton Laboratory United Kingdom
Otto Kreiter DANTE
Jiri Navratil CESNET Czech Republic
Ana Preston Hunsinger Internet2 USA
David Simonsen WAYF Denmark
Brook Schofield TERENA
Frans Ward SURFnet Netherlands
Stefan Winter RESTENA Luxembourg
TERENA support  
Miroslav Milinović TERENA VP Conferences, Srce Croatia
Karel Vietsch TERENA
Bert van Pinxteren TERENA
Gyöngyi Horváth TERENA