@InProceedings{ PAMS2015-Monitoring, author = "Thomas Dreibholz and Jarle Bjørgeengen and Jonas Werme", title = "{Monitoring and Maintaining the Infrastructure of the NorNet Testbed for Multi-Homed Systems}", booktitle = "{5th International Workshop on Protocols and Applications with Multi-Homing Support~(PAMS)}", pages = "611--616", numpages = "6", day = "25", month = mar, year = "2015", address = "Gwangju/South Korea", language = "english", isbn = "978-1-4799-1775-4", doi = "10.1109/WAINA.2015.76", note = "{ISBN} 978-1-4799-1775-4", keywords = "NorNet, Internet Testbed, Monitoring, Multi-Homing, Path Characteristics, Resilience", abstract = "{NorNet Core is the world's first, open, large-scale Internet testbed for multi-homed systems and applications. Particularly, it is currently used for research on topics like multi-path 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.}", url = "https://www.simula.no/file/pams2015-nornet-monitoring-webpdf/download", url.size = "550079", url.md5 = "de8568f766023dba008bb7201f92b6a3", url.mime = "application/pdf", url.pagesize = "595.276 x 841.89 pts (A4)", url.checked = "2015-02-22 12:12:13 CET" }