NorNet Core – A multi-homed research testbed

2014 28th International Conference on Advanced Information Networking and Applications Workshops

et al. 2014

Self Cite

The Internet is based on best effort communication, i.e. it tries to deliver packets but does not provide any guarantees. A transport protocol can make use of this best effort service to provide a suitable service to its applications. Also, its congestion control is responsible for a fair distribution of the resources within the Internet. However, background data transfer applications (like file sharing or update fetching) do not require "best effort"; they in fact could use a "lower-than-best-effort" service to leave resources to more important applications if needed. For this purpose, the Low Extra Delay Background Transport (LEDBAT) algorithm has been standardized by the IETF.Nowadays, multi-homing is becoming increasingly common in modern networks and several approaches to exploit this feature (e.g. CMT-SCTP, MPTCP) have evolved that are able to combine resources of multiple paths. For background traffic oriented algorithms like LEDBAT, this feature could be of great use, too, i.e. by increasing the overall bandwidth while shifting the transmission away from paths which are used by other flows. This could be particularly useful for non-critical bulk transfers in data centres. In this paper, we introduce our approach LEDBAT for Multi-Path -denoted as LEDBAT-MP -and analyze its performance by simulations. With this paper, we want to highlight some generic design questions and start a discussion on how a solid universal background multi-path congestion control strategy should behave.

Section: Discussionmentioning

confidence: 99%

LEDBAT-MP -- On the Application of "Lower-than-Best-Effort" for Concurrent Multipath Transfer

Adhari

Werner

2014 28th International Conference on Advanced Information Networking and Applications Workshops

et al. 2014

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“…The NORNET CORE [24], [25] testbed is the world's first, open, large-scale Internet testbed for multi-homed systems and applications. A unique characteristic of NORNET CORE is that most sites are multi-homed to several ISPs.…”

Section: A the Nornet Core Testbedmentioning

confidence: 99%

Performance comparison of congestion control strategies for multi-path TCP in the NORNET testbed

Zhou

2015 IEEE/CIC International Conference on Communications in China (ICCC)

et al. 2015

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Multi-path transport has become a hot topic in Internet protocol research with the evolution of emerging technologies, particularly with the market penetration of access terminals having multiple network interfaces (e.g. smartphones with LTE/UMTS and Wi-Fi interfaces). Multi-Path TCP (MPTCP) is an extension of TCP that allows a connection to create several subflows for utilizing multiple network paths. Using multiple endto-end TCP connections as subflows, MPTCP distributes data to different subflows over multiple ISPs, so as to enhance network robustness and improve throughput. This paper first presents MPTCP's architecture and multi-path congestion control algorithm concepts. Then, it examines three test scenarios in the NORNET testbed, particularly highlighting the performance difference between using uncoupled and coupled congestion controls in multi-homed, real-world Internet setups. The results show that MPTCP with coupled CCs gets more benefits than TCP and demonstrates the lower aggressiveness in comparison to MPTCP with uncoupled CCs.

“…To make it easier to run such experiments in the Internet, the Simula Research Laboratory [21] [24], [25]. In this paper, we focus on NORNET CORE, i.e.…”

Section: The Nornet Testbedmentioning

confidence: 99%

Maintaining and Monitoring the Infrastructure of the NORNET CORE Testbed for Multi-homed Systems

2015 IEEE 29th International Conference on Advanced Information Networking and Applications Workshops

Bjorgeengen

Werme

2015

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NORNET CORE is the world's first, open, largescale Internet testbed for multi-homed systems and applications. Particularly, it is currently used for research on topics like multipath transport and resilience. Researchers can run experiments on distributed, programmable nodes that are distributed over various locations and providing access to multiple different Internet service providers (ISP) with different access technologies. Clearly, a key feature of this testbed is to work in the real-world Internet. That is, it is especially desired to expose experiments to real Internet behaviour like background traffic. However, for the researcher, it is necessary to actually know how paths -being used for an experiment -actually behave: Are the paths actually working? How are the round-trip times among sites over different ISPs, etc.. How did the behaviour change over time?To provide such information to the researchers, we have designed and developed a maintenance and monitoring infrastructure for the NORNET CORE testbed. In this paper, we will first introduce this infrastructure. Furthermore, we will demonstrate its usefulness with some useful, real-world examples. Our infrastructure has now become part of the testbed, and it is therefore available for all users of NORNET CORE as well. 1