About
The Network Development Kit (NDK) is an open-source framework for high-speed FPGA network applications. Following up on last year's overview and feature set, this presentation dives into the technical implementation and specific design challenges of building 400 GE network monitoring probes. Monitoring probes perform wire-speed protocol parsing, traffic filtering, packet marking, and flow statistics calculation—tasks that overwhelm software-only solutions at high data rates. While HW offload is essential, implementing these functions at 400 Gbps in an FPGA is quite difficult. In the presentation, we will explain how we achieve this by processing multiple packets in each clock cycle, while delving into the pipeline of such a monitoring probe. Additionally, we will discuss the "causality" problem—where clock drift across different monitoring points causes network flows to appear out of order—and describe how we leverage White Rabbit synchronization to address it.
00:00:00 Slide 1
00:01:18 Slide 2
00:01:52 Slide 3
00:02:28 Slide 4
00:03:07 Slide 5
00:04:46 Slide 6
00:05:23 Slide 7
00:06:13 Slide 8
00:07:05 Slide 9
00:07:45 Slide 10
00:08:02 Slide 11
The talk
Credits and licence
- Institution
- CERN
- Speaker
- Daniel Kondys
- Year
- 2026
- Language
- English
- Source
- CERN
- Licence
- CERN, as CERN states it. CERN's terms
- Attribution
- © CERN. CERN provides its audiovisual media free of charge for educational and informational use, credited to CERN; this lecture is shown in CERN's own player.
- Who can watch
- CERN gives no rating. Invisible Network shows it to Teens profiles and older, judged from what the source says about it. How courses are placed