Peter Phaal

Learn how standard measurements from data center switches provides visibility into RDMA traffic from AI / ML workloads. Troubleshoot latency and drops. Includes live dashboards showing production traffic. blog.sflow.com/2026/03/nanog9…

See how to visualize AI/ML RoCEv2 traffic flows. Includes live dashboard showing production traffic. blog.sflow.com/2026/02/real-t…

N96 Talks are Streaming! youtube.com/playlist?list=… The N96 talks are on YouTube! 🎥✨ Whether you couldn’t make it in person or just want to relive the best moments, the full lineup is available! Subscribe to our YouTube + keep the conversation going long after the conference.

Just published on YouTube from @nanog and #NANOG96. Lightning Talk: Seeing Through the RDMA Fog: Monitoring RoCEv2 with sFlow youtu.be/vM-M0vtvxLI?si…

The SDSC Expanse cluster live AI/ML metrics dashboard is a joint InMon / San Diego Supercomputer Center (SDSC) demonstration at SC25 conference being held this week in St. Louis. Click on the dashboard link during the show to see live traffic. blog.sflow.com/2025/11/sc25-s…

Real-time visibility into production Ultra Ethernet Transport (UET) traffic using industry standard data center switch telemetry blog.sflow.com/2025/11/ultra-…

Vector Packet Processor (VPP) release 25.10 extends the sFlow implementation to include support for dropped packet notifications. blog.sflow.com/2025/10/vector…

Industry standard packet sampling in data center switch hardware from all leading vendors (Arista, Cisco, Dell, Juniper, NVIDIA, etc.) provides a cost effective solution for even the largest AI / ML fabrics. blog.sflow.com/2025/10/ai-ml-…

Trimming packets that would otherwise be dropped in AI/ML networks is part of Ultra Ethernet congestion control and currently supported in NVIDIA switches and adapters. Monitoring trimmed packets is a useful metric for network visibility blog.sflow.com/2025/09/packet…

pwru (packet, where are you?) is an open source tool from Cilium that used eBPF instrumentation in recent Linux kernels to trace network packets through the kernel. Try it out using Multipass on your laptop. blog.sflow.com/2025/07/tracin…

Grafana dashboard showing performance metrics for AI/ML RoCEv2 network traffic. Step by step instructions using free Grafana Cloud account. blog.sflow.com/2025/06/ai-met…

Grafana dashboard showing performance metrics for AI/ML RoCEv2 network traffic used for inter-GPU communications. Includes step by step instructions to give it a try! blog.sflow.com/2025/04/ai-met…

The availability of the Cisco IOS XR Release 25.1.1 brings sFlow dropped packet notification support to Cisco 8000 series routers, making it easy to capture and analyze packets dropped at router ingress. blog.sflow.com/2025/04/droppe…

Interesting differences between network traffic patterns seen in two live AI / ML clusters. blog.sflow.com/2025/04/compar…

Video now available of must see lightning talk by Pim van Pelt describing recently released sFlow VPP implementation. fosdem.org/2025/schedule/…

The application provides performance metrics for AI/ML RoCEv2 network traffic, for example, large scale CUDA compute tasks using NVIDIA Collective Communication Library (NCCL) operations for inter-GPU communications. Step by step instructions. blog.sflow.com/2025/02/ai-met…

It can be very useful to capture telemetry from production networks so that it can be replayed later to perform off-line analysis, or to develop or evaluate collection tools. sFlow tcpdump sflowtool Prometheus Grafana blog.sflow.com/2025/01/replay…

Topology aware flow analytics with NVIDIA NetQ. Perform advanced fabric aware analytics, for example: detect flow collisions, trace flow paths, and de-duplicate traffic. blog.sflow.com/2024/11/topolo…

Over 10Tbps of WAN traffic at #SC24 #SCinet blog.sflow.com/2024/11/sc24-o…

Over 3Tbits/second of RoCEv2 traffic at SC24! Read how real-time network flow analytics helped troubleshoot performance issues. #SC24 #AI #ML blog.sflow.com/2024/11/sc24-r…