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EVPN for the rest of us – what happens when software people try to use EVPN (denog17)
Last year we migrated our datacentre networks from a flat layer 2-based architecture to EVPN-VXLAN. As an organisation whose primary technical background is in software, a network project of this complexity has been a journey into new and uncharted territory. Our previous network design had been showing signs of reaching its limits for several years, so in late 2023 we started designing a replacement based on EVPN-VXLAN, terminated directly on our Linux hypervisors. After not quite nine months of development the project culminated in an intensive week-long migration in our production datacentre – with zero...
200 GbE network processing with 100 W - or "can I *make* a chip for that?" (denog17)
This talk presents how to to offload networking tasks onto dedicated hardware/smartNICs/NPUs (network processing units) - chips, and why this is a great idea. First, we take a look at chips in general - how they are made, integrated into networks, and why time is playing to the advantage of dedicated chips vs. CPUs/software. Then, focus is on how offloading network tasks is a particularly beautiful example of the advantages of hardware-implementing logic, with examples like TCP offloading, cybersecurity applications, or traffic shaping. To be fair and balanced, there will also be a look at the downsides...
Entering the big Cloud Game: A journey of ups and downs towards sovereignity at scale (denog17)
This talk would be held by my two colleagues: Michael Bayr (artcodix) and Gerhard Bader (Yorizon Cloud) Yorizon Cloud is the joint venture of HOCHTIEF PPP Solutions and Thomas-Krenn.AG In these times of global political and technical threats and disruptions, we are driven by our spirit of digital sovereignty when we design a new European, de-centralized, sustainable and custom-made cloud infrastructure. In their talk, my two colleagues would give an insight into the technologies we apply, open source based and European to the core. One basic focus will be the network technology and the standardized stack that...
Security.txt across the industry (denog17)
This talk explores the adoption of `security.txt`, as defined in [RFC 9116](https://www.rfc-editor.org/rfc/rfc9116), that enables websites to publish security contact information in a consistent and accessible way. We begin with a brief introduction to the RFC and the motivation behind standardized vulnerability disclosure.
But is this even important to the network industry? To find out, we conclude with a focused analysis of security.txt adoption among organizations represented by this conference’s attendees, highlighting real-world trends, blind spots, and where we go from here.
Licensed to the public under http://creativecommons.org/licenses/by/4.0
about this event: https://pretalx.com/denog17/talk/WKBJGE/
Video:denog17-75240-eng-Securitytxt_across_the_industry_hd.mp4
Sorry we messed up (denog17)
How we route-leaked everything to everyone due to a fun Arista bug.
A post-mortem kind of story about us changing Arista RCF function names, resulting in a global route leak. The talk includes the history of why we intended to make a change, how we rollout configurations, why it resulted in an unexpected behavior and how it was fixed.
Licensed to the public under http://creativecommons.org/licenses/by/4.0
about this event: https://pretalx.com/denog17/talk/KQ9JWA/
Video:denog17-75474-eng-Sorry_we_messed_up_hd.mp4
400G ZR+ BiDi does not exist, it can't hurt you. Or can it? (denog17)
As it's common practice, each new hacker event needs something weird and funky. For this years summer camp in the Netherlands called WHY2025, we build a 400G link over a single fibre. Since 400G BiDi does not exist (yet), we had to get creative and built something, which might be considered out of spec.
Licensed to the public under http://creativecommons.org/licenses/by/4.0
about this event: https://pretalx.com/denog17/talk/KLXJS8/
Video:denog17-78260-eng-400G_ZR_BiDi_does_not_exist_it_cant_hurt_you_Or_can_it_hd.mp4
Day 1 Closing (denog17)
That's a wrap on Day1, time for the social!
Licensed to the public under http://creativecommons.org/licenses/by/4.0
about this event: https://pretalx.com/denog17/talk/MVDVUL/
Video:denog17-81768-eng-Day_1_Closing_hd.mp4
Understanding and optimising transceiver efficiency using internal metrics for improved power savings (denog17)
In high-performance optical communication systems transceiver health and efficiency are critical to network reliability and energy consumption. This presentation explores the powerful capabilities of Versatile Diagnostics Monitoring (VDM) features found in modern optical transceivers (beyond the speed of 100G) with a particular focus on the Thermoelectric Cooler (TEC) current metrics. By analysing TEC current alongside temperature and cable length data we should be able to identify the optimal operating conditions that will minimise power consumption while maintaining performance. In order to prove this thesis we developed a couple of software prototypes to perform the...
Ultra Ethernet: Addressing AI/HPC Interconnect Challenges Beyond the InfiniBand Monopoly (denog17)
For years, InfiniBand has dominated high-performance interconnects. Yet for strategic and technical reasons, there has been a huge industry ask to develop a new next-generation protocol for use in AI and HPC environments. This session introduces Ultra Ethernet, an innovative standard designed to tackle the limitations seen in RDMA around scalability, latency and congestion management, crucial for democratizing future AI/HPC build outs. Join us for a comprehensive exploration of the technologies poised to redefine Storage or GPU interconnectivity and challenge the status quo. We also discuss the future of the UEC and how collaboration among...
Th3 Flock of Bird s (denog17)
As Bird is evolving over the years and we now have Bird version 3 available at our fingertips, maybe we should know the capabilities of it and what performance we can expect from it.
Get some numbers in comparison with other routing stacks.
Let's take a quick look on the shiny new feathers Bird prepared for us.
Licensed to the public under http://creativecommons.org/licenses/by/4.0
about this event: https://pretalx.com/denog17/talk/XRVTP3/
Video:denog17-78857-eng-Th3_Flock_of_Bird_s_hd.mp4