Lightning:The story of how eduroam went down for a day at Ulm University and the problem's peculiar resolution

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Description A few weeks ago on an early monday morning it was reluctantly determined by us and our staff that eduroam somehow stopped working at our university in Ulm over the weekend.

Quickly we found that none of the usual solutions would work this time as every service on its own was working just perfectly. Be part of an astonishing journey into the depth of the network of Ulm University, the protocol spanning tree and malconfiguration and see with your own eyes how an unplugged network device caused eduroam and our public wifi named welcome to break down and learn how to avoid these circumstances in your own network as they can be reproduced in many scenarios.

Slides https://drive.google.com/open?id=1Lkzm6g7Kq_fgqB3LX9dSs4qLW2ctjs-P
Tags eduroam, networking, spanning-tree, packet reflection
Person organizing User:Johannes Deger
Contact: johannes.deger@uni-ulm.de
Language en - English
en - English
Duration 5
Desired session Day 2
Desired timeframe middle

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Video starts at https://www.youtube.com/watch?v=67rh6jB2UVQ#t=1h08m48s